bicycle gearbox control device

Abstract

Bicycle transmission control device (70) configured to switch between a first control state for controlling the transmission (50) based on a first signal (S1) input by a first detector (54) detecting a rotation of a crank (32), and a second control state for controlling the transmission (50) based on a second signal (S2) input by a second detector (62) detecting a value reflecting a bicycle speed, wherein the first control state and the second control state are switched based on the first signal (S1) and the second signal (S2), wherein a control signal (SA) for controlling the transmission (50) based on the first signal (S1) is output when a rotational speed (NA) of the crank (32) based on the first signal (S1) is greater than or equal to the maximum rotational speed of the crank (32) based on the second signal (S2).and / or wherein a control signal (SA) is output to control the transmission (50) based on the second signal (S2) when a maximum speed of the crank (32) based on the second signal (S2) is greater than a speed (NA) of the crank (32) based on the first signal (S1).

Description

TECHNICAL AREA

[0001] The present invention relates to a bicycle transmission control device. STATE OF THE ART

[0002] Patent document 1 discloses a technology for controlling a transmission which is based solely on signals output by either a cadence sensor or a vehicle speed sensor, so that the rotational speed of a crank is maintained for a certain range. DOCUMENT OF THE STATE OF TECHNICAL PATENT DOCUMENTS

[0003] Patent document 1: Japanese publication no. 1997-123978 SUMMARY OF THE INVENTION; TASK TO BE SOLVED BY THE INVENTION

[0004] With conventional technology, there is a risk that the gear ratio will be changed at an inappropriate time depending on the riding condition of the bicycle.

[0005] It is an object of the present invention to provide a bicycle transmission control device which is designed to change the transmission ratio at an appropriate time. MEANS OF SOLVING THE TASK

[0006] The bicycle gear control device according to an embodiment of the present invention is configured to switch between a first control state for controlling the gear based on a first signal input from a first detector that detects the rotation of a crank, and a second control state for controlling the gear based on a second signal input from a second detector that detects a value reflecting a bicycle speed.

[0007] According to one embodiment of the bicycle gear control device, the second detector detects the rotation of a wheel of the bicycle.

[0008] According to one embodiment of the bicycle transmission control device, the first control state and the second control state are switched based on the first signal and the second signal.

[0009] According to one embodiment of the bicycle gear control device, the first control state and the second control state are switched based on the first signal, the second signal and a manual drive force applied to the crank.

[0010] According to one embodiment of the bicycle gear control device, the first control state and the second control state are switched based on the manual drive force applied to the crank.

[0011] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the first signal when the rotational speed of the crank, based on the first signal, is greater than or equal to the maximum rotational speed of the crank, based on the second signal.

[0012] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the second signal when the maximum speed of the crank based on the second signal is greater than the speed of the crank based on the first signal.

[0013] According to one embodiment of the bicycle gear control device, a control signal for controlling the gear is output based on the second signal when the maximum speed of the crank based on the second signal is greater than the speed of the crank based on the first signal, and the manual driving force is less than a predetermined value.

[0014] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the first signal when the maximum speed of the crank, based on the second signal, is greater than the speed of the crank, based on the first signal, and the manual driving force is greater than or equal to a predetermined value.

[0015] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the first signal when the manual driving force is greater than or equal to a predetermined value.

[0016] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the second signal when the manual driving force is less than a predetermined value.

[0017] According to one embodiment of the bicycle gear control device, the manual drive force is detected based on a third signal input from a drive force sensor, which outputs the third signal in response to a manual drive force applied to the crank.

[0018] According to one embodiment of the bicycle transmission control device, a control signal is output to control the transmission when the transmission is controlled based on the first signal, so that the speed of the crank based on the first signal will be a predetermined crank speed or a crank speed within a predetermined range.

[0019] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output when the transmission is controlled based on the second signal, so that the maximum speed of the crank, based on the second signal, will be a predetermined crank speed or a crank speed within a predetermined range.

[0020] According to one embodiment of the bicycle gear control device, the maximum speed of the crank is detected based on the second signal, on information regarding the gear ratio and on information regarding a diameter, radius or circumference of the wheel.

[0021] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the second signal if there is an anomaly in the first signal.

[0022] According to one embodiment of the bicycle transmission control device, a control signal for controlling the transmission is output based on the first signal if there is an anomaly in the second signal.

[0023] According to one embodiment of the bicycle gear control device, a minimum angle during a rotation of the crank that can be detected by the first detector is smaller than a minimum angle during a rotation of the wheel that can be detected by the second detector.

[0024] According to one embodiment of the bicycle transmission control device, the transmission is actuated such that the gear ratio increases when the transmission is controlled based on the first signal and the crank speed is greater than or equal to a first upper limit; the transmission is actuated such that the gear ratio decreases when the transmission is controlled based on the first signal and the crank speed is less than or equal to a first lower limit; the transmission is actuated such that the gear ratio increases when the transmission is controlled based on the second signal and the maximum crank speed corresponding to the second signal is greater than or equal to a second upper limit; and the transmission is actuated such that the gear ratio decreases when the transmission is controlled based on the second signal and the maximum crank speed is less than or equal to a second upper limit.which corresponds to the second signal, is less than or equal to a second lower limit.

[0025] According to one embodiment of the bicycle transmission control device, the second upper limit is smaller than the first upper limit.

[0026] According to one embodiment of the bicycle transmission control device, the second lower limit is greater than the first lower limit.

[0027] According to one embodiment of the bicycle transmission control device, the range between the second upper limit and the second lower limit is 25–50% of the range between the first upper limit and the first lower limit.

[0028] According to one embodiment of the bicycle transmission control device, the transmission is not actuated when the crank speed reaches a range below the first upper limit and above the first lower limit during a period from when the crank speed is greater than or equal to the first upper limit or less than or equal to the first lower limit until a first standby period expires, when the transmission is controlled based on the first signal, and the transmission is not actuated when the crank speed reaches a range below the second upper limit and above the second lower limit during a period from when the maximum crank speed is greater than or equal to the second upper limit or less than or equal to the second lower limit until a second standby period expires.when the transmission is controlled based on the second signal.

[0029] According to one embodiment of the bicycle gear control device, the second standby period is less than or equal to the first standby period.

[0030] According to one embodiment of the bicycle transmission control device, the first standby period and the second standby period are determined based on the driving load of the bicycle.

[0031] According to one embodiment of the bicycle transmission control device, the second standby period is less than or equal to the first standby period if the bicycle's driving load is within the same range.

[0032] According to one embodiment of the bicycle transmission control device, the first standby period and the second standby period are determined based on a previous shifting operation of the transmission and the driving load of the bicycle. EFFECTS OF THE INVENTION

[0033] The bicycle transmission control device according to the invention is designed to change the transmission ratio at an appropriate time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Fig. Figure 1 is a side view of a bicycle of a first embodiment.

[0035] Fig. 2 is a block diagram showing the electrical setup of the [device]. Fig. The bicycle shown is one example.

[0036] Fig. 3 is a flowchart of a switching process of the control state, which is initiated by the control device in Fig. 2 is carried out.

[0037] Fig. Figure 4 is a flowchart of a circuit process carried out by the control device in Fig. 2 is carried out.

[0038] Fig.Figure 5 is a flowchart of a circuit process carried out by the control device of a second embodiment.

[0039] Fig. Figure 6 is a flowchart of a circuit process in a modified example of a second embodiment.

[0040] Fig. Figure 7 is a flowchart of a circuit process in a modified example of a second embodiment.

[0041] Fig. Figure 8 is a flowchart of a switching process in a modified example of each of the embodiments.

[0042] Fig. Figure 9 is a flowchart of a switching process in a modified example of each of the embodiments.

[0043] Fig. Figure 10 is a flowchart of a switching process in a modified example of each embodiment. EXECUTIVE FORMS OF THE INVENTION (First embodiment)

[0044] The construction of a bicycle 10 will be with reference to Fig. 1 explained.

[0045] The bike 10 includes a framework 12 , a handlebar 14 , a front wheel 16 , a rear wheel 18 , a drive mechanism 20 , a gear shift control device 22 , a gearshift device 24 , a first detection device 26 (see Fig. 2) a second detection device 28 (see Fig. 2) a drive force sensor 30 , a gear change state detection device 68 (see Fig. 2) and a control device 70 .

[0046] The drive mechanism 20 includes a crank 32 , a front sprocket 34 , a rear sprocket 36 , a chain 38 and a pedal 44 .

[0047] The crank 32includes a crankshaft 40 , which are through the frame 12 is rotatably mounted, and has a left and right crank arm 42 Each of the left and right pedals 44 includes a pedal shaft 46 The left and right crank arms 42 are on a crankshaft 40 attached. The main body of the pedal 44 is around the pedal shaft 46 rotatable on the crank arm 42 attached.

[0048] The front sprocket 34 is attached to the crankshaft 40 coupled. The front pinion 34 is connected to the crankshaft 40 Designed to be coaxial. The front pinion 34 can be coupled in such a way that it is not relative to the crankshaft 40 rotates, or via a freewheel clutch (diagram omitted), so that the front sprocket 34 rolls forward when the crankshaft 40 rolls forward.

[0049] The rear sprocket 36 is about an axle shaft 18A of the rear wheel 18 Rotatably mounted. The rear sprocket. 36 is connected to the rear wheel via a freewheel clutch 18 coupled. The chain 38 is on the front sprocket 34 and the rear sprocket 36 wound up. When the crank arm 32 due to a problem with the pedal 44 When the applied manual driving force rotates, the rear wheel 18 through the front sprocket 34 , the chain 38 and the rear sprocket 36 turned.

[0050] The gear shift control unit 22 is on the handlebars 14 attached. The gear shift control unit 22 is electrically connected to the control device via a cable that is not shown. 70 connected. If the gear shift control unit 22 When activated by a driver, the gear shift control unit sends22 an up-switching signal or a down-switching signal to the control device 70 Upshifting is a shift in the direction that increases the gear ratio γ, and downshifting is a shift in the direction that decreases the gear ratio γ.

[0051] As in Fig. The gearshift device shown in section 2 includes 24 a motor unit 48 and a gearbox 50 The gearbox 50 is achieved through an internal gearbox that is connected to a hub of the rear wheel. 18 (see Fig. 1) is integrated. The gearbox 50 is designed to include a planetary gear mechanism that is driven by the motor unit 48 is controlled. The transmission 50 The gear ratio γ changes stepwise. The motor unit 48The transmission ratio γ changes by altering the coupling state of the gears that make up the planetary gear mechanism of the transmission. 50 form. The motor unit 48 is electrically connected to the control device via a cable that is not shown. 70 connected. The motor unit 48 It comprises an electric motor and a reduction gearbox to reduce the output rotation of the electric motor. The electric motor is connected to the gearbox via the reduction gearbox. 50 tied together.

[0052] The first detection device 26 detects the rotation of the crank 32 (see Fig. 1) The first detection device 26 includes two magnets 52A and 52B and a first detector 54 , which is attached to the frame 12 is attached. The magnet 52AA ring magnet is a type of magnet in which several magnetic poles are arranged alternately next to each other in the circumferential direction. 52A is on the crankshaft 40 or the crank arm 42 designed and coaxial with the crankshaft 40 arranged. The magnet 52B is on either the left or the right crank arm 42 attached.

[0053] The first detector 54 is electrically connected to the control device via a cable that is not shown. 70 connected. The first detector 54 sends in response to the rotation of the crank 32 a first signal S1 to the control device 70 The first detector 54 is a so-called cadence sensor. The first detector 54 includes an element 56A , which outputs a value that reflects changes in the magnetic field of the magnet 52A corresponds to, and an element 56, which is the magnetic field of the magnet 52B detected. The element 56A detects the relative angular position of the crank with respect to the frame. The element 56B detects a reference angle position of the crank relative to the frame.

[0054] The first detector 54 includes a first speed calculation unit 58 , which determines the rotational speed of the crank 32 per unit of time (hereafter referred to as the “first rotational speed NA”) from the output of the elements 56A and 56B calculated. The first detector 54 A first signal S1, containing information representing the first rotational speed NA, is sent to the control device. 70 out. The element 56A It outputs a signal where one cycle is the angle obtained by dividing 360° by the number of magnetic poles with the same polarity when the crankshaft makes one rotation. The element 56Boutputs a signal where one cycle is one rotation of the crankshaft.

[0055] The element 56B outputs a value corresponding to the rotation angle of the crank 32 (see Fig. 1) corresponds to the minimum angle of the crank. 32 (see Fig. 1), which is detected by the first detector 54 The angle that can be detected is less than or equal to 180 degrees, preferably 15 degrees, and more preferably six degrees.

[0056] The second detection device 28 detects the rotation of the front wheel 16 , which is the wheel at the front (see Fig. 1) The second detection device 28 includes a magnet 60 , which is attached to spokes 16A of the front wheel 16 is attached, and a second magnet 62 , which is attached to a front fork 12A of the frame 12 is attached. The magnet 60 can be attached to spokes 18B of the rear wheel 18be attached. In this case, the second detector 62 on a chainstay of the frame 12 attached. The second detector 62 is attached to the frame 12 It is fixed by a screw and nut, a strap, etc. The second detector is described below. 62 trained, the rotation of the front wheel 16 to detect, however, there is a case where the second detector 62 the rotation of the rear wheel 18 detected, with only the front wheel 16 through the rear wheel 18 is replaced; therefore, the description of this is omitted.

[0057] The second detector 62 is electrically connected to the control device via a cable that is not shown. 70 connected. The second detector 62 sends a signal in response to the rotation of the front wheel. 16 a second signal S2 to the control device 70The second detector 62 is a so-called vehicle speed sensor. The second detector 62 includes an element 64 , which outputs a value representing changes in the relative position to the magnet 60 corresponds to, and a vehicle speed calculation unit 66 , which calculates the distance traveled per unit of time (hereinafter referred to as the “vehicle speed V”) from the output of the element 64 calculated.

[0058] The element 64 outputs a signal where one cycle represents one rotation of the front wheel 16 (see Fig. 1) is. That is, the minimum angle of the front wheel. 16 , which is through the second detector 62 The detectable range is 360 degrees. The minimum detectable angle during one rotation of the crank is... 32 is smaller than the minimum detectable angle during a rotation of the front wheel 16 .

[0059] The vehicle speed calculation unit 66 calculates the vehicle speed V by using the circumferential length (hereafter referred to as the “circumferential length L”) of the front wheel 16 (see Fig. 1), which is previously stored, with the rotational speed of the front wheel 16 (see Fig. 1) multiplied per unit of time. The second detector 62 A second signal S2, containing information regarding the vehicle speed V, is sent to the control device. 70 Calculating the vehicle speed V using the diameter or radius of the front wheel. 16 (see Fig. Option 1) is also possible. In this case, the diameter or radius of the front wheel is... 16 (see Fig. 1) previously in the detector 62 saved.

[0060] The gear shift state detection device 68detects the current gear shift state of the gearshift device 24 The gear change state detection device 68 can be attached to the engine unit 48 or at the gear shift control unit 22 The gear-change state detection device is provided for. 68 It outputs information regarding the shift position, that is, regarding the gear ratio γ. The gear change state detection device 68 detects the rotation angle of a predetermined section of the electric motor or braking device in the motor unit 48 , the angle of rotation of a given section of the gearbox 50 , etc. The gear change state detection device 68 It consists of a potentiometer or a detection device that includes a magnet and a magnetic sensor that detects the magnet, etc. The gear-change state detection device 68 is with the control device70 electrically connected.

[0061] The drive force sensor 30 detects a manual driving force acting on the crank 32 (see Fig. 1) is exerted. The drive force sensor 30 It outputs a third signal S3, which includes a signal corresponding to the manual drive force. The drive force sensor 30 can be between the crankshaft 40 , which in Fig. 1 is shown, and the front sprocket 34 , the crankshaft 40 , the front sprocket 34 , the crank arm 42 or the pedal 44 be provided. The drive force sensor 30 This can be achieved by using, for example, a strain sensor, a magnetostrictive sensor, an optical sensor, or a pressure sensor; any sensor can be used as long as the sensor outputs a signal that corresponds to the manual driving force applied to the crank arm.42 or the pedal 44 is exercised.

[0062] As in Fig. The control device shown in section 2 includes... 70 a second speed calculation unit 72 , a speed comparison unit 74 , a drive force calculation unit 76 , a selection value setting unit 78 , a gearshift determination unit 80 , a storage unit 84 and an engine control unit 82 The control device 70 It is designed to include an arithmetic processor, such as a CPU, and a storage device on which software is stored, and is designed to implement a plurality of functions. The second speed calculation unit 72 , the speed comparison unit 74 , the drive force calculation unit 76 , the selection value setting unit 78 , the gearshift determination unit 80and the engine control unit 82 represent the functions of the control device 70 The control device 70 It can include multiple arithmetic processors and multiple microcomputers. The second signal S2 is fed into the second speed calculation unit. 72 The first signal S1 is entered into the speed comparison unit. 74 and the selection value setting unit 78 entered.

[0063] The second speed calculation unit 72 estimates the second rotational speed NB of the crank 32 based on the second signal S2 from the second detector 62 , Information regarding the circumference L of the front wheel 16 (see Fig. 1) and the transmission ratio γ at that time. The second speed calculation unit calculates this more precisely. 72the second rotational speed NB by dividing the vehicle speed V, which is contained in the second signal S2, by the circumferential length L of the front wheel 16 and the transmission ratio γ is divided. The second speed calculation unit 72 The second speed (NB) is sent to the speed comparison unit. 74 The relationship between the translation ratio γ and the detection results of the gear-change state detection device. 68 is predetermined, and such a relationship is stored in memory. The second speed calculation unit 72 performs a calculation using the corresponding translation ratio γ, or obtains the translation ratio γ by using a function from the detection results of the gear change state detection device. 68 .

[0064] The rotational speed of the front wheel 16 (see Fig.1) can be greater than a value obtained by multiplying the gear ratio by the crank rotation speed 32 is obtained. For example, there are cases where the front wheel 16 turns, even when the crank 32 is stopped, as when driving downhill. For this reason, there are cases where the second rotational speed NB, which is based on the output of the second detector, is not used. 62 The calculated value is greater than the first rotational speed NA. This is because the minimum detectable angle occurs during a rotation of the front wheel. 16 is greater than the detectable minimum angle during a rotation of the crank 32 Furthermore, there are cases where a delay occurs in calculating the second rotational speed NB, and the calculated second rotational speed NB is a value greater than the first rotational speed NA. The second rotational speed NB corresponds to the rotational speed of the crank. 32 , when the crank 32and the front wheel 16 to rotate synchronously, that is, at the maximum speed of the crank 32 .

[0065] The speed comparison unit 74 compares the first rotational speed NA, which is represented by information contained in the first signal S1, and the second rotational speed NB, which is represented by information contained in a signal provided by the second speed calculation unit. 72 is output. The speed comparison unit 74 It sends either the first speed NA or the second speed NB, based on whichever is larger, to the selection value setting unit. 78 out. The drive force calculation unit 76 The manual drive force T is calculated based on the third signal S3 from the drive force sensor. 30 and provides the manual drive force T to the selection value setting unit 78The first speed NA and the second speed NB are entered into the selection value setting unit. 78 entered. The selection value setting unit 78 sets the first speed NA or the second speed NB as the selection value N, based on the comparison results of the speed comparison unit. 74 and the manual drive force T or based solely on the comparison results of the speed comparison unit 74 , and gives the selection value N to the gearshift determination unit 80 out of.

[0066] The control device 70 switches between a first control state for controlling the transmission. 50 based on the first signal S1 and a second control state to control the gearbox 50 based on the second signal S2. The control device 70switches between the first control state and the second control state based on the first speed NA, the second speed NB and the manual drive force T.

[0067] The switching process of the control state by the control device 70 will be with reference to Fig. 3 described.

[0068] In step S11, the second speed calculation unit calculates 72 The second rotational speed (NB) is based on the vehicle speed (V). Next, in step S12, the selection value setting unit compares this. 78The first speed NA and the second speed NB are selected. The process proceeds to step S13 if the first speed NA is greater than or equal to the second speed NB and sets the first speed NA to the selection value N. If the first speed NA is set to the selection value N in the previous switching operation, the selection value N is maintained at the first speed NA. If the second speed NB is set to the selection value N in the previous switching operation, the selection value N changes from the second speed NB to the first speed NA, and the control state switches from the second control state to the first control state.

[0069] If in step S12 the second speed NB is greater than the first speed NA, the selection value setting unit returns. 78The process returns to step S14 and determines whether the manual drive force T is greater than or equal to a predefined value TX. If the manual drive force T is greater than or equal to the predefined value TX, the process continues to step S15 and sets the first speed NA to the selection value N. If the first speed NA is set to the selection value N in the previous switching operation, the selection value N is maintained at the first speed NA. If the second speed NB is set to the selection value N in the previous switching operation, the selection value N changes from the second speed NB to the first speed NA, and the control state switches from the first control state to the second control state.

[0070] If the manual drive force T is less than the specified value TX in step S14, the selection value setting unit moves 78The program proceeds to step S16 and sets the second speed NB to the selection value N. If the second speed NB is set to the selection value N in the previous switching operation, the selection value N is retained at the second speed NB. If the first speed NA is set to the selection value N in the previous switching operation, the selection value N changes from the first speed NA to the second speed NB, and the control state switches from the second control state to the first control state. For example, a value between 1 Nm and 3 Nm is selected as the preset value TX.

[0071] The gearshift determination unit 80 , which in Fig. As shown in 2, it sends an upshift signal or a downshift signal to the engine control unit. 82 based on the selection value N, which is in the selection value setting unit 78 is set. The gearshift control unit. 80can read a first determination value NX and a second determination value NY, which are stored in the memory unit 84 are stored. The first determined value NX and the second determined value NY are threshold values. The gear shift determination unit. 80 The device outputs a high-level signal when the selected value N is greater than or equal to the first determined value NX, and a low-level signal when the selected value N is less than or equal to the second determined value NY. Preferably, a value greater than or equal to the second determined value NY is selected as the first determined value NX. For example, 65 rpm–70 rpm is selected as the first determined value NX, and a value between 60 rpm–65 rpm is selected as the second determined value.

[0072] The first determination value NX and the second determination value NY are set as values ​​at which the gearbox 50It is controlled in such a way that the selection value N will be a predetermined crank speed or a crank speed within a prescribed range. In other words, the gear shift determination unit controls 80 the gearbox 50 so that the first rotational speed NA will be a predetermined crankshaft speed or a crankshaft speed within a predetermined range when it engages the transmission. 50 It controls based on the first signal S1. Furthermore, it controls the gear shift determination unit. 80 the gearbox 50 so that the second speed NB will be a predetermined crank speed or a crank speed within a predetermined range when it engages the gearbox. 50 based on the second signal S2.

[0073] The procedure for the shifting process, which is carried out by the gearshift determination unit 80 is carried out with reference to Fig. 4 described.

[0074] The gearshift determination unit 80 Step S21 determines whether the selection value N is greater than or equal to the first determination value NX. If the selection value N is greater than or equal to the first determination value NX, the gearshift determination unit generates an upshift signal and sends it to the engine control unit. 82 in step S22.

[0075] If the selection value N in step S21 is smaller than the first determination value NX, the gear shift determination unit determines 80 In step S23, it is determined whether the selection value N is less than or equal to the second determination value NY. If the selection value N is less than or equal to the second determination value NY, the gearshift determination unit generates 80 a downshift signal and sends it to the engine control unit 82 in step S24.

[0076] If the selection value N in step S23 is greater than the second determination value NY, the gear shift determination unit returns 80 no upshift or downshift signal to the engine control unit 82 out of.

[0077] The engine control unit 82 , which in Fig. As shown in section 2, the motor unit controls 48 based on a signal from the gear shift determination unit 80 is output, or a signal issued by the gear shift control unit 22 is entered. The engine control unit 82 gives a control signal SA to shift the gear shifting position up. 24 to the drive circuit (diagram omitted) of the motor unit 48 The engine control unit switches off when an upshift signal is input. 82 Provides a control signal SA to downshift the gearshift position of the gearshift device. 24to the drive circuit (diagram omitted) of the motor unit 48 The engine control unit switches off when a downshift signal is input. If an upshift signal is input at the time of the maximum gear ratio γ, and if a downshift signal is input at the time of the minimum gear ratio γ, the engine control unit switches off. 82 the engine unit 48 do not drive.

[0078] The activity and effects of the control device 70 is described. (1) The minimum angle of the crank 32 , which passes through the first detector 54 The angle that can be detected is smaller than the minimum angle of the front wheel. 16 , which is through the second detector 62 can be detected. That is, the first rotational speed NA, which depends on the output of the first detector. 54The calculated value is more accurate than the second rotational speed NB, which depends on the output of the second detector. 62 is calculated. For this reason, it is possible to more appropriately select the gearbox. 50 to change, as if the gearbox 50 based on the second speed NB is controlled by the gearbox 50 is controlled based on the first rotational speed NA.

[0079] If the gearbox 50 is controlled based on only the first rotational speed NA, for example when the rotation of the crank 32 is stopped while the bicycle 10 When the vehicle is driven, the transmission is controlled to downshift, thus reducing the gear ratio γ. In this case, this occurs immediately after the driver starts turning the crank. 32When it starts again, a situation arises in which the manual driving force is not immediately transferred to the wheels because the gear ratio γ is too small, and it becomes difficult to control the speed of the crank. 32 to make it fit into the specified area.

[0080] The control device 70 is designed to control the transmission from a first control state. 50 based on the first signal S1 and a second control state to control the gearbox 50 based on the second signal S2, it is possible to switch the gear ratio γ based on signals S1 and S2, which represent the riding situations, etc., of the bicycle. 10 are suitable. Therefore, it is possible to change the translation ratio γ at an appropriate time. (2) For example, the accuracy of the second rotational speed NB depends on the output of the second detector.62 is calculated less accurately than the first rotational speed NA, which depends on the output of the first detector. 54 is calculated. For this reason, there are cases where the second rotational speed NB becomes greater than the first rotational speed NA, even if the crank 32 and the front wheel 16 They should actually rotate synchronously, especially when the vehicle speed is suddenly increased or decreased.

[0081] If the gearshift device 24 Since the system is controlled by comparing only the second speed NB and the first speed NA, there are cases where the gear ratio γ becomes large due to gear shifting based on the second speed NB, even if the crank 32 and the front wheel 16 They should actually rotate synchronously.

[0082] The control device 70 controls the transmission 50Based on the first rotational speed NA, if the manual driving force T is greater than or equal to a predetermined value TX, even if the second rotational speed NB is greater than the first rotational speed NA. For this reason, steering the bicycle depending on the rider's load is possible, and it is possible to prevent an inappropriate gear ratio γ, even if the vehicle speed changes rapidly. (Second embodiment)

[0083] The structure of a control device 70 According to the second embodiment, with reference to Fig. 5 described. The control device 70 The second embodiment performs a switching process which is described in Fig. 5 is shown, instead of a circuit operation of the first embodiment, which is shown in Fig. Figure 4 shows the switching process. Fig. The sequence shown as 5 is repeated until the device is switched off. A memory unit also stores this information.84 (see Fig. 2) A first upper limit NA1, a first lower limit NA2, a second upper limit NB1, a second lower limit NB2, and a table relating to a first standby period PA and a second standby period PB, instead of the determined value NX, NY. The first upper limit NA1, the first lower limit NA2, the second upper limit NB1, the second lower limit NB2, the first standby period PA, and the second standby period PB are threshold values. Arrangements common to the first embodiment are indicated with the same reference numerals as in the first embodiment, and their descriptions are omitted.

[0084] The procedure of the shifting process, which is carried out by a gear shift determination unit 80 The process will be explained.

[0085] The gearshift determination unit 80determines whether a selection value N, which is determined by a selection value setting unit 78 In step S31, the first rotational speed NA was selected or not.

[0086] If the selection value N is the first speed NA, the gear shift determination unit determines 80 In step S31, it is determined whether the selection value N is greater than or equal to the first upper limit NA1. If the selection value N is greater than or equal to the first upper limit NA1, the gearshift determination unit determines 80 In step S33, it is determined whether the first standby period PA since a previous shift has expired. The previous shift is when either an upshift signal or a downshift signal was last sent to a transmission. 50 was issued. If the control device 70 an upshift signal and a downshift signal to the gearbox 50 The control device counts the output. 70From this moment on, the elapsed time is counted up.

[0087] When the first standby period PA since the previous shift has expired, the gear shift determination unit generates 80 a shift signal and sends this to an engine control unit 82 in step S34. If the first standby period PA in step S33 has not expired, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0088] If the selection value N in step S32 is less than the first upper limit NA1, the gear shift determination unit determines 80 In step S35, the system determines whether the selection value N is less than or equal to the first lower limit NA2. If the selection value N in step S35 is greater than the first lower limit NA2, the gearshift determination unit outputs a value. 80no upshift or downshift signal to the engine control unit 82 That is, if the initial rotational speed NA in a first control state is less than the first upper limit NA1 and greater than the first lower limit NA2, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0089] If the selection value N in step S35 is less than or equal to the first lower limit NA2, the gear shift determination unit determines 80 in step S36, whether the first standby period PA since the previous switching has expired or not.

[0090] When the first standby period PA since the previous shift has expired, the gear shift determination unit generates 80 a downshift signal and sends it to the engine control unit 82in step S37. If the first standby period PA in step S36 has not expired, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0091] That is, the control device 70 operates the gearbox 50 so that the transmission ratio γ increases when the gearbox 50 is controlled based on a first signal and when the first rotational speed NA, which is a rotational speed of a crank, 32 is greater than or equal to the first upper limit NA1, and operates the gearbox so that the gear ratio γ becomes smaller when the gearbox 50 is controlled based on the first signal and if the first rotational speed NA is less than or equal to the first lower limit.

[0092] The control device also operates 70 the gearbox 50not if the crank speed reaches a range below the first upper limit NA1 and above the first lower limit NA2 during a period from when the first speed NA is greater than or equal to the first upper limit NA1 or less than or equal to the first lower limit NA2 until when the first standby period PA expires, when the gearbox 50 It is controlled based on the first signal.

[0093] If the selection value N in step S31 is a second speed NB, the gear shift determination unit determines 80 In step S38, it is determined whether the selection value N is greater than or equal to the second upper limit NB1. If the selection value N is greater than or equal to the second upper limit NB1, the gearshift determination unit determines 80In step S39, the system checks whether the second standby period PB has expired since the previous shift. If the second standby period PB has expired, the gearshift determination unit generates a value. 80 a shift signal and sends it to the engine control unit 82 in step S40. If the second standby period PB in step S39 has not expired, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0094] If the selection value N in step S38 is less than the second upper limit NB1, the gearshift determination unit determines 80 In step S41, the system determines whether the selection value N is less than or equal to the second lower limit NB2. If the selection value N in step S42 is greater than the second lower limit NB2, the gearshift determination unit outputs a value. 80no upshift or downshift signal to the engine control unit 82 That is, if the second speed NB in ​​a second control state is less than the second upper limit NB1 and greater than the second lower limit NB2, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0095] If the selection value N in step S41 is less than or equal to the second lower limit NB2, the gear shift determination unit determines 80 In step S36, the system checks whether the second standby period PB has expired since the previous shift. If the second standby period PB has expired, the gearshift determination unit generates a signal. 80 a downshift signal and sends it to the engine control unit 82in step S43. If the second standby period PB in step S43 has not expired, the gearshift determination unit outputs 80 no upshift or downshift signal to the engine control unit 82 out of.

[0096] That is, the control device 70 operates the gearbox 50 so that the transmission ratio γ increases when the gearbox 50 It is controlled based on the second signal and if the second speed NB is greater than or equal to the second upper limit NB1, it actuates the gearbox. 50 so that the transmission ratio γ becomes smaller when the gearbox 50 is controlled based on the second signal and if the second rotational speed NB is less than or equal to the second lower limit NB2.

[0097] The control device also changes 70The gear ratio γ does not reach a range below the second upper limit NB1 and above the second lower limit NB2 during a period from when the second speed NB is greater than or equal to the second upper limit NB1 or less than or equal to the second lower limit NB2, until when the second standby period PB expires, if the gearbox is controlled based on the second signal.

[0098] The storage unit 84The system stores the first upper limit NA1, the first lower limit NA2, the second upper limit NB1, and the second lower limit NB2. The second upper limit NB1 is lower than the first upper limit NA1. The second lower limit NB2 is higher than the first lower limit NA2. Preferably, the range between the second upper limit NB1 and the second lower limit NB2 is 25–50% of the range between the first upper limit NA1 and the first lower limit NA2. For example, the first upper limit NA1 is 70 rpm, the first lower limit NA2 is 50 rpm, the second upper limit NB1 is 67.5 rpm, and the second lower limit NB2 is 52.5 rpm.

[0099] The storage unit 84The table stores the information relating to the first standby period PA and the second standby period PB. The first standby period PA and the second standby period PB are determined based on a control state, a driving load R, and a previous switching operation. The driving load R is determined based on at least one manual drive force applied to a pedal. 44 is exercised, a bicycle speed of a bicycle 10 and a rotation of the crank 32 The driving load R is calculated, for example, by subtracting the changed kinetic energy of the bicycle from the input energy. The input energy is obtained by applying a torque to the crank, which is generated by the force applied to the pedal. 44The applied manual driving force is used, and the rotational speed of the crank is integrated. The changed kinetic energy of the bicycle is obtained from the weight of the bicycle and rider and the bicycle's speed. The changed kinetic energy of the bicycle is, for example, calculated as 1 / 2m(v2 – V1) 2 received. The bicycle speed of the bicycle. 10 can use the first speed NA. The speed of the crank 32 The second rotational speed NB can be used. The driving load R comprises a first driving load RA and a second driving load RB. The first driving load RA is, for example, a relatively small driving load R, such as when the bicycle 10 The second driving load RB is, for example, a relatively large driving load R, such as when the bicycle is going downhill. 10 driving uphill. The second driving load RB is greater than the first driving load RA.

[0100] Table 1 shows a control state, a first driving load RA, a previous shifting operation, and a relationship table between a first standby period PA and a second standby period PB when an upshift condition is met. The upshift condition is met when the first speed NA is greater than the upper limit NA1 in the first control state, and when the second speed NB is greater than the upper limit NB1 in the second control state. [Table 1] First standby period PA and second standby period PB, when the up-switching condition is met. Driving load R Greater than or equal to the first driving load RA Smaller than first driving load RA Control state First control state Second control state First control state Second control state Previous switching operation Shifting up Pamid PBmin Pamid PBmin Downshifting PAmax PBmax Pamid PBmin

[0101] For a maximum period PAmax, a mean period PAmid, and a minimum period PAmin of the first standby period PA, the relationship PAmax > PAmid > PAmin holds. For a maximum period PBmax, a mean period PBmid, and a minimum period PBmin of the second standby period PB, the relationship PBmax > PBmid > PBmin holds. The maximum period PBmax can be equal to or different from the maximum period PAmax. The mean period PBmid can be equal to or different from the mean period PAmid. The minimum period PBmin can be equal to or different from the minimum period PAmin. For example, the maximum period PAmax, PBmax is 1000 milliseconds. The mean period PAmid, PBmid is, for example, a period that is half the maximum period PAmax, PBmax and is 500 milliseconds.The minimum period PAmin, PBmin, for example, is a period that is half the mean period PAmid, PBmid, and is 250 milliseconds.

[0102] If the upshift condition is met during the previous shift operation, which is upshifting, and if the driving load R is greater than or equal to the first driving load RA, the control device 70 The first standby period PA or the second standby period PB is set to the maximum period PAmax or the maximum period PBmax. In other words, the control device sets the first standby period PA or the second standby period PBmax to the maximum period PAmax or the maximum period PBmax. 70 a longer period in which upshifting is prohibited if the driving load R is high, such as when the bicycle 10 downshifting while driving on a level road, as if the driving load R is small, such as when the bicycle 10 goes downhill.

[0103] Table 2 shows a control state, a second driving load RB, a previous shifting operation, and a relationship table between a first standby period PA and a second standby period PB when a downshift condition is met. The downshift condition is met when the first speed NA is less than the lower limit NA2 in the first control state, and when the second speed NB is less than the lower limit NB2 in the second control state. [Table 2] First standby period PA and second standby period PB, if the shutdown condition is met. Driving load R Smaller than the second driving load RB Greater than or equal to the second driving load RB Control state First control state Second control state First control state Second control state Previous switching operation Shifting up PAmax PBmax Pamid PBmin Downshifting Pamid PBmin Pamid PBmin

[0104] If the downshift condition is met during the previous shift operation, which is an upshift, and if the driving load R is less than the second driving load RB, the control device 70The first standby period PA or the second standby period PB is set to the maximum period PAmax or the maximum period PBmax. In other words, the control device sets the first standby period PA or the second standby period PBmax to the maximum period PAmax or the maximum period PBmax. 70 a period during which downshifting is prohibited is longer if the driving load R is small, such as when the bicycle 10 performs an upshift while driving on a level road, as if the driving load R is high, such as after the bicycle 10 performed an upshift while driving uphill.

[0105] As shown in Table 1 and Table 2, the first standby period PA and the second standby period PB are based on the previous shifting operation of the gearbox. 50 and the driving load R of the bicycle 10 The second standby period PB is less than or equal to the first standby period PA when the cycling load R is set. 10is contained in the same area.

[0106] In addition to the effects of the first embodiment described in (1) and (2), the control device 70 to produce the following effects. (3) The second upper limit NB1 differs from the first upper limit NA1. For this reason, the control device 70 Change the translation ratio γ using the upper limit NA1, NB1, which is suitable for each of the first control state and the second control state. (4) The second lower limit NB2 differs from the first lower limit NA2. For this reason, the control device 70 The translation ratio γ is changed using the lower limit NA2, NB2, which is suitable for each of the first control state and the second control state. (5) The second upper limit NB1 is smaller than the first upper limit NA1. Likewise, the second lower limit NB2 is larger than the first lower limit NA2. That is to say, the range between the second upper limit NB1 and the second lower limit NB2 is smaller than the range between the first upper limit NA1 and the first lower limit NA2. For this reason, shifting is made easier in the second control state, or more precisely, when the rider stops and the cranks are turned. 32 does not turn, or if that affects the crank 32 The applied torque is small, such as when the first rotational speed NA is lower than the second rotational speed NB. Therefore, the driver hardly perceives any mismatch due to a gear shift. 50 , compared to when a shift is performed while a crank is engaged 32The applied torque is large. Since a shifting operation is facilitated when a force is applied to the crank, this is beneficial. 32 Furthermore, if the applied torque is large, the frequency of a malfunction in the shifting process can increase due to the fact that a force is applied to the crank. 32 The applied torque is large and can be reduced. (6) As the gear ratio γ increases, the rotational speed of the crank tends to increase. 32 to become smaller. For this reason, the downshift condition tends to be met immediately after the gear ratio γ increases. As the gear ratio γ decreases, the crank rotation speed also tends to decrease. 32 to become larger. For this reason, the upshift condition tends to be met immediately after the gear ratio γ decreases. When the upshift or downshift condition is met, the control device changes 70The conversion ratio γ does not change until the first standby period PA or the second standby period PB since the previous switching operation has elapsed. Therefore, repeated switching operations within a short period of time can be prevented. (7) The control device 70 The readiness period PA, PB is shorter when the upshift condition is met than when the previous shift was an upshift, and also shorter when the downshift condition is met while the driving load R is greater than or equal to the initial driving load RA. For this reason, upshifting is facilitated in conditions where the driving load R is low, such as when driving downhill. Therefore, the driver experiences little to no perceived imbalance due to a transmission shift. 50 , and the frequency of malfunctions in the circuit process can be reduced. (8) The control device 70 The readiness period PA, PB is shorter when the downshift condition is met than when the previous shifting operation was downshifting and when the upshift condition is met while the driving load R is less than the second driving load RB. For this reason, downshifting is made easier in a state where the driving load R is high, such as when driving uphill. (9) If the driving load R is contained within the same range, the second standby period PB is less than or equal to the first standby period PA. For this reason, switching is facilitated in the second control state, where the second speed NB is greater than the first speed NA. (Modified example)

[0107] The specific form that the present control device can assume is not limited to the forms shown in each of the embodiments described above. The present control device can assume various forms that differ from each of the embodiments described above. The modified example of each of the embodiments described above, shown below, is an example of the various forms that the present control device can assume. • Changing the circuit process of the second embodiment into the process that is in Fig. As shown in 6, this is also possible. In this modified example, the storage unit stores... 84 The first determination value NX and the second determination value NY. The gearshift determination unit. 80The system executes the operation of step S51 instead of the operation of step S32 to determine whether the selection value N is greater than or equal to the first determination value NX. The gearshift determination unit 80 The process of step S54 is executed instead of the process of step S38 to determine whether the selection value N is greater than or equal to the first determination value NX. The gearshift determination unit also executes the following steps: 80 The process of step S52 is used instead of the process of step S35 to determine whether the selection value N is less than or equal to the second determination value NY. The gearshift determination unit 80 executes the operation of step S54 instead of the operation of step S41 to determine whether the selection value N is less than or equal to the second determination value NY. The circuit operation, which is in Fig.The sequence shown in step 6 is repeated until the system is switched off. The gearshift control unit. 80 It proceeds to step S33 if an affirmative determination is made in step S51, and to step S52 if a negative determination is made in step S51. The gearshift determination unit 80 The system proceeds to step S36 if an affirmative determination is made in step S52, and terminates the shifting process if a negative determination is made in step S52. The gearshift determination unit 80 It proceeds to step S39 if an affirmative determination is made in step S53, and to step S54 if a negative determination is made in step S53. The gearshift determination unit 80 proceeds to step S42 if an affirmative determination is made in step S54, and terminates the switching process if a negative determination is made in step S54. In the process that occurs in Fig.As shown in Figure 6, threshold values, which are switching conditions, are not changed at the time of switching based on the first speed NA and at the time of switching based on the second speed NB. • In the switching process of the second embodiment, steps S33, S36, S39 and S42, which are described in Fig. 5 are shown, but omitted. That is, as in Fig. As shown in 7, the control device 70 The control device emits a switching signal and terminates the switching process if, in steps S32 and S38, the selection value N is greater than or equal to the upper limit NA1, NB1. 70 Outputs a down-switching signal and terminates the switching process if, in steps S35 and S41, the selection value N is greater than or equal to the lower limit NA2, NB2. • In the second embodiment, the control device 70at least one of the first upper limit NA1, the first lower limit NA2, the second upper limit NB1, and the second lower limit NB2 is obtained by calculation. For example, the storage unit stores 84 the first upper limit NA1 and the first lower limit NA2. In the second control state, the control device sets 70 a value obtained by multiplying a first coefficient greater than or equal to “1” with the first upper limit NA1 is set as the second upper limit NB1, and a value obtained by multiplying a second coefficient less than “1” with the second lower limit NA2 is set as the second lower limit NB2. • In the second embodiment, the first readiness period PA can be a constant value, regardless of the driving load R and the previous switching operation. • In the second embodiment, the second standby period PB can be a constant value, regardless of the driving load R and the previous switching operation. • In the second embodiment, the second standby period PB can be equal to the first standby period PA. • In the second embodiment, the second standby period PB can be set to be less than or equal to the first standby period, regardless of the driving load R and the previous switching operation. • In the second embodiment, the control device 70 at least one of the first standby periods PA and the second standby period PB is obtained by calculation. For example, the storage unit stores 84 the maximum period Pmax. The control device 70calculates the first standby period PA or the second standby period PB by multiplying a correction coefficient based on the control state, the driving load R and the previous switching operation by the maximum period Pmax. • In each of the embodiments, it is also possible to change the switching process to the process that is in Fig. 8 is shown. That is, the control device 70 It switches between the first control state and the second control state based on the manual drive force T. More precisely, it determines this after the second speed calculation unit. 72 the second rotational speed NB is calculated in step S61, the selection value setting unit 78 In step S62, it is determined whether the manual drive force T is greater than or equal to the predefined value TX. If the manual drive force T is greater than or equal to the predefined value TX, the selection value setting unit moves.78 proceeds to step S63 and sets the first speed NA to the selection value N; if the manual drive force T is less than the specified value TX, the selection value setting unit moves 78 proceeds to step S64 and sets the second speed NB to the selection value N. • During the switching operations of each embodiment, it is also possible to use the operations of step S14 and step S15 of the switching operation described in Fig. 3 is shown, to be omitted. That is, as in Fig. As shown in 9, the control device 70 The first speed NA is set to the selection value N if the first speed NA is greater than or equal to the second speed NB; the second speed NB is set to the selection value N if the first speed NA is less than the second speed NB. • It is also possible to integrate the switching process into the process of the embodiments in the Fig.To change the process shown in section 10. The control device 70 During the initial setup, the first speed NA is set to the selected value N. The control device 70 In step S71, the control unit determines whether the first speed NA is the selected value N. If the first speed NA is the selected value N, the control unit determines in step S72 whether an anomaly has occurred in the first signal S1 or not. If step S72 determines that an anomaly has occurred in the first signal S1, the control unit switches 70 In step S73, the second speed NB is set to the selection value N. If it was determined in step S72 that no anomaly occurred in the first signal S1, the control unit stops. 70 Furthermore, the selection value N is set at the first rotational speed NA, and the current process ends.

[0108] If in step S71 a determination is made that the first speed NA is not the selection value N, that is, if the second speed NB is the selection value N, the control device stops. 70 the selection value N at the second rotational speed NB, and the current process ends.

[0109] An anomaly is determined to have occurred in the first signal S1 if, for example, the first rotational speed NA contained in the first signal S1 does not change from a constant value, or if the first rotational speed NA is excessively high, even if a determination can be made based on the second signal S2 that the bicycle is in a riding state. Examples of cases in which the rotational speed NA does not change from a constant value, even if the bicycle 10 is in a driving state, includes the adhesion of contaminants, such as dirt, to the first detector. 54, a malfunction of the first detector 54 , the falling of the magnets 52A and 52B from the crank 32 and the disconnection of a telegraph line (diagram omitted), which connects to the first detector 54 and the control device 70 connects them. Furthermore, an example of a case where the first rotational speed NA is excessively large is a short-circuit malfunction within the first detector. 54 , etc.

[0110] In the Fig. The modified example shown in 10 can be used for the control device 70During the initial setup, the second speed (NB) is set to the selection value N, and the first speed (NA) is switched to the selection value N if an anomaly occurs in the second signal (S2). The rider can select whether the second speed (NB) or the first speed (NA) is selected during the initial setup. In this case, a bicycle computer, personal computer, or similar device with an input interface can be electrically connected to the control unit. 70 be connected, and the initial setting can be made via such a device. • Adding the process of the in Fig. 10 modified examples shown for the one in Fig. The switching process shown in Figure 3 is also possible. That is, the processes of steps S51–S53 can be repeated after steps S13 and S15. Fig. 3 carried out, and the process described above of the in Fig.The example shown in step 10 is carried out after step S16. • During the switching operations of each embodiment, it is also possible to change the processing sequence of the operations of step S12 and step S14, which are described in Fig. 3 are shown, to be exchanged for each other. In this case, for example, the control device determines 70In step S12, the process determines whether the manual drive force T is greater than or equal to a predefined value TX. If the manual drive force T is greater than or equal to a predefined value TX, the process continues to step S13. Furthermore, if the manual drive force T in step S12 is less than the predefined value TX, step S14 determines whether the first rotational speed NA is greater than or equal to the second rotational speed NB. If step S14 determines that the first rotational speed NA is greater than or equal to the second rotational speed NB, the process continues to step S15 and sets the first rotational speed NA to the selected value N. If step S14 determines that the first rotational speed NA is less than the second rotational speed NB, the process continues to step S16 and sets the second rotational speed NB to the selected value N. • In each of the embodiments, it is also possible to use the magnet 52Athe first detection device 26 on the pedal 44 to attach. • In each of the embodiments, it is also possible to use the first detector 54 the first detection device 26 at the crank 32 to attach and the magnets 52A and 52B on the frame 12 to attach. In this case, the first detector sends 54 The first signal S1 is sent to the control device via wireless communication. 70 . • In each of the embodiments, the output of the elements can be 56A and 56B the first detection device 26 directly into the control device 70 can be entered, or it can be inserted into the control device 70 to be entered after the output of the elements 56A and 56B was amplified. In this case, the control device includes 70 the function of the first speed calculation unit58 , and the first rotational speed NA is determined by the control device 70 calculated. • In each of the embodiments, it is also possible to use the element 56A the first detection device 26 to leave a rotation angle sensor that rotates around the crankshaft 40 is attached around it. • In each of the embodiments, it is possible to use at least one of the elements 56A , 56A the first detection device 26 or the element 64 the second detection device 28 to be formed from an optical sensor. • In each of the embodiments, it is possible to modify the setup so that the second detection device 28 on a rear wheel 18 It is attached, which has a wheel on the back, and the magnet 60 on the frame 12 is attached to prevent the rotation of the rear wheel 18to detect. In this case, the second detector sends 62 The first signal S1 is sent to the control device via wireless communication. 70 . • In each of the embodiments, the output of the element can be 64 the second detection device 28 directly into the control device 70 can be entered, or it can be inserted into the control device 70 to be entered after the output of the element. 64 was amplified. In this case, the control device includes 70 the function of the vehicle speed calculation unit 66 , and the control device 70 The second rotational speed is calculated by NB. • In each of the embodiments, a hub dynamo can be used instead of the magnet. 60 and of the element 64 the second detection device 28 They can be used. A hub dynamo provides power for each predetermined angle of rotation of the front wheel. 16a periodic signal or a pulse signal to the vehicle speed calculation unit 66 out of. • It is also possible to use the second detection device 28 Each embodiment is comprised of a GPS (Global Positioning System) receiver. In this case, the second detection device calculates 28 or the control device 70 The second rotational speed NB is based on the distance traveled per unit of time by the bicycle. 10 , Information regarding the circumference L of the front wheel 16 and the translation ratio γ at that time. • It is also possible to adjust the minimum angle of the front wheel. 16 , which is through the second detector 62 Each of the embodiments can be detected if it is less than or equal to the minimum angle of the crank. 32 to make, which passes through the first detector 54can be detected. In this case, for example, the first detector includes 54 no magnet 52B or the element 56B and features a setup for detecting the position of the magnet 52 only once per turn of the crank; also, the second detector 62 designed to include a hub dynamo. In this modified example, the accuracy of the rotational speed depends on the output of the second detector. 62 The calculated value is higher than the accuracy of the rotational speed, which depends on the output of the first detector. 54 is calculated. In this case, the control device 70 perform the aforementioned switching process by adjusting the rotational speed, which depends on the output of the second detector. 62 is calculated, resulting in the first rotational speed NA, and by determining the rotational speed, which depends on the output of the first detector 54is calculated, resulting in the second rotational speed NB.

[0111] In each of the embodiments, it is possible to adjust the control device. 70 to provide a storage unit into which a control signal SA is input, which is from the engine control unit 82 is output, and the translation ratio γ is detected based on the control signal SA, which is stored in the memory unit. • In each of the embodiments, it is also possible to use the gearshift device 24 to be modified into an electric external gearshift device. The electric external gearshift device may include a front external gearbox and a rear external gearbox. Furthermore, the gearshift device may 24 so that they are modified on the crankshaft 40is attached. In short, any gearshift device can be used as long as the gearshift device is designed to control the gear ratio γ with a control device. 70 to change. Reference symbol list 10 bicycles 16 Front wheel (wheel) 30 Drive force sensor 32 crank 50 gearboxes 54 First Detector 62 Second Detector 70 Control device QUOTES INCLUDED IN THE DESCRIPTION

[0112] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0113] JP 1997-123978

[0003]

Claims

[1] Bicycle transmission control device configured to switch between a first control state for controlling the transmission based on a first signal input from a first detector detecting a rotation of a crank and a second control state for controlling the transmission based on a second signal input from a second detector detecting a value reflecting a bicycle speed. [2] Bicycle transmission control device according to claim 1, wherein the second detector detects a rotation of a wheel of the bicycle. [3] Bicycle transmission control device according to claim 1 or 2, wherein the first control state and the second control state are switched based on the first signal and the second signal. [4] Bicycle transmission control device according to claim 1 or 2, wherein the first control state and the second control state are switched based on the first signal, the second signal and a manual drive force applied to the crank. [5] Bicycle transmission control device according to claim 1 or 2, wherein the first control state and the second control state are switched based on the manual drive force applied to the crank. [6] Bicycle transmission control device according to claim 3, wherein a control signal for controlling the transmission is output based on the first signal when a rotational speed of the crank based on the first signal is greater than or equal to the maximum rotational speed of the crank based on the second signal. [7] Bicycle transmission control device according to claim 3 or 6, wherein a control signal for controlling the transmission is output based on the second signal when a maximum speed of the crank based on the second signal is greater than a speed of the crank based on the first signal. [8] Bicycle transmission control device according to claim 4, wherein a control signal for controlling the transmission is output based on the second signal when a maximum rotational speed of the crank based on the second signal is greater than the rotational speed of the crank based on the first signal, and the manual driving force is less than a predetermined value. [9] Bicycle transmission control device according to claim 4 or 8, wherein a control signal for controlling the transmission is output based on the first signal when a maximum speed of the crank based on the second signal is greater than the speed of the crank based on the first signal, and the manual driving force is greater than or equal to a predetermined value. [10] Bicycle transmission control device according to claim 5, wherein a control signal for controlling the transmission is output based on the first signal when the manual drive force is greater than or equal to a predetermined value. [11] Bicycle transmission control device according to claim 5 or 10, wherein a control signal for controlling the transmission is output based on the second signal when the manual drive force is less than a predetermined value. [12] Bicycle transmission control device according to one of claims 4, 5 and 8-11, wherein the manual drive force is detected based on a third signal input from a drive force sensor which outputs the third signal in response to a manual drive force applied to the crank. [13] Bicycle transmission control device according to one of claims 1 to 12, wherein a control signal for controlling the transmission is output when the transmission is controlled based on the first signal, such that the rotational speed of the crank based on the first signal will be a predetermined crank rotational speed or a crank rotational speed within a predetermined range. [14] Bicycle transmission control device according to one of claims 1 to 13, wherein a control signal for controlling the transmission is output when the transmission is controlled based on the second signal, such that the maximum speed of the crank based on the second signal will be a predetermined crank speed or a crank speed within a predetermined range. [15] Bicycle transmission control device according to claim 14, wherein the maximum speed of the crank is detected based on the second signal, on information regarding the gear ratio and on information regarding a diameter, radius or circumference of the wheel. [16] Bicycle transmission control device according to any one of claims 1 to 15, wherein a control signal for controlling the transmission is output based on the second signal when an anomaly has occurred in the first signal. [17] Bicycle transmission control device according to any one of claims 1 to 16, wherein a control signal for controlling the transmission is output based on the first signal when an anomaly has occurred in the second signal. [18] Bicycle transmission control device according to claim 2 or one of claims 3 to 17 relating to claim 2, wherein a minimum angle during a rotation of the crank that can be detected by the first detector is smaller than a minimum angle during a rotation of the wheel that can be detected by the second detector. [19] Bicycle transmission control device according to any one of claims 1 to 18, wherein the transmission is actuated such that the gear ratio increases when the transmission is controlled based on the first signal and when the rotational speed of the crank is greater than or equal to a first upper limit, The gearbox is operated in such a way that the gear ratio becomes smaller when the gearbox is controlled based on the first signal and when the crank speed is less than or equal to a first lower limit, the transmission is operated in such a way that the gear ratio increases when the transmission is controlled based on the second signal and when the maximum speed of the crank corresponding to the second signal is greater than or equal to a second upper limit, and The gearbox is operated in such a way that the gear ratio becomes smaller when the gearbox is controlled based on the second signal and when the maximum speed of the crank corresponding to the second signal is less than or equal to a second lower limit. [20] Bicycle transmission control device according to claim 19, wherein the second upper limit is smaller than the first upper limit. [21] Bicycle transmission control device according to claim 19 or 20, wherein the second lower limit is greater than the first lower limit. [22] Bicycle transmission control device according to one of claims 19 to 21, wherein a range between the second upper limit and the second lower limit is 25–50% of a range between the first upper limit and the first lower limit. [23] Bicycle transmission control device according to one of claims 19 to 22, wherein The transmission is not operated if the crankshaft speed reaches a range below the first upper limit and above the first lower limit during a period from when the crankshaft speed is greater than or equal to the first upper limit or less than or equal to the first lower limit until when a first standby period expires, if the transmission is controlled based on the first signal, and The gearbox will not be operated if the crankshaft speed reaches a range below the second upper limit and above the second lower limit during a period from when the maximum crankshaft speed is greater than or equal to the second upper limit or less than or equal to the second lower limit until a second standby period expires, if the gearbox is controlled based on the second signal. [24] Bicycle transmission control device according to claim 23, wherein the second standby period is less than or equal to the first standby period. [25] Bicycle transmission control device according to claim 23, wherein the first standby period and the second standby period are determined based on a driving load of the bicycle. [26] Bicycle transmission control device according to claim 25, wherein the second standby period is less than or equal to the first standby period if the driving load of the bicycle is contained in the same range. [27] Bicycle transmission control device according to claim 26, wherein the first standby period and the second standby period are determined based on a previous shifting operation of the transmission and the driving load of the bicycle.