134 results about "Semi-automatic transmission" patented technology

A gear train of an automatic transmission realizes at least ten forward speeds and one reverse speed by combining four simple planetary gear sets with four clutches and two brakes. In addition, three friction elements are operated at each shift-speed. Therefore, the gear train has advantages of simplifying structures of the automatic transmission and improving power delivery performance and fuel economy.

The invention provides a hydraulic device for gear shift of a double-clutch automatic transmission, which belongs to the technical field of machinery and solves the problems of more execution elements of a gear shift system of the conventional double-clutch automatic transmission, high cost and complex system control. The hydraulic device for the gear shift of the double-clutch automatic transmission is arranged in the double-clutch automatic transmission provided with a first clutch and a second clutch, and comprises an odd gear hydraulic control system connected with the first clutch and an even gear hydraulic control system connected with the second clutch; an odd gear reversing valve capable of switching an oil flow direction is arranged in the odd gear hydraulic control system; an even gear reversing valve capable of switching the oil flow direction is arranged in the even gear hydraulic control system; the device also comprises a control valve connected with the odd gear reversing valve and the even gear reversing valve at the same time; and the control valve can drive the odd gear reversing valve and the even gear reversing valve to shift the gear. The gear shift system of the double-clutch automatic transmission has the advantages of few execution elements and low cost.

A shifting device for the preferably powerless transmission of shift commands to a fully automatic or semi-automatic transmission of a motor vehicle and a frame and/or housing and a gearshift lever mounted pivotably along a shift gate. A first shift stop and a second shift stop are provided for the gearshift lever which each define a shift position for the said gearshift lever. At least one detection device is provided for detecting the shift position(s). An inoperative position is provided into which the gearshift lever pivots back by itself from the deflected shift position, driven by a restoring force. The shifting device has an actuating device, which can countermand a shift stop, so that the gearshift lever can be pivoted beyond the shift position(s) defined by this shift stop.

The shift-lever apparatus of an automatic transmission for enabling manual mode operation includes a housing, a shift-lever connected to a rotating unit disposed at a lower portion of the housing such that the shift-lever can rotate about the rotating unit, and a base member fixed to the shift-lever and enclosed by the housing, such that the base member moves according to the movement of the shift-lever. The apparatus also includes “+” and “−” switches, each being disposed at either side of the base member, such that the “+” and “−” switches are selectively operated according to the movement of the shift-lever. Finally, the apparatus includes a switch operating unit disposed at the base member such that the switch operating unit selectively presses the “+” and “−” switches.

A vehicle (1) having a frame, at least two wheels (14, 16), a straddle seat (28), a handlebar (18) with first (20) and second (22) handles, an engine (30), and a semi-automatic transmission (32). A reverse actuator (152) is electronically connected to a control unit (46) of the semi-automatic transmission. At least one shifter (108) is electronically connected to the control unit such that moving the at least one shifter to an up-shift position causes the control unit to send a signal to the semi-automatic transmission to shift up and moving the at least one shifter to the down-shift position causes the control unit to send a signal to the semi-automatic transmission to shift down. The control unit sends a signal to the semi-automatic transmission to select the at least one reverse gear (34) only when the reverse actuator is actuated while the at least one shifter is moved. A method of controlling a semi-automatic transmission is also disclosed.

A vehicle (10) has a frame (12), at least two wheels (14, 16), a straddle seat (28), a handlebar (18) having first (20) and second (22) handles, an engine (30), a semi-automatic transmission (32), and a housing (24) disposed adjacent the first handle. A shift lever (108) is pivotally connected to the housing. At least a portion of the shift lever extends away from the handle side of the housing towards an end of the first handle and is disposed at least in part vertically below the first handle. The shift lever has rear (140) and front surfaces (142). The shift lever is movable to an up-shift position by pressing one of the front and rear surfaces, is movable to a down-shift position by pressing a remaining one of the front and rear surfaces, and is biased towards a rest position intermediate the up-shift and down-shift positions. The shift lever is operatively connected to the semi-automatic transmission.

The invention discloses a five-gear automatic transmission-based hybrid vehicle transmission system, which comprises an internal-combustion engine, a hydraulic torque converter, a main motor, a regulating motor, a first planet row, a first clutch, a second clutch, a spur gear A, a spur gear B, a spur gear C, a spur gear D, a spur gear E, an inverter, a storage battery, a differential mechanism and a five-gear automatic transmission gear structure. Power dividing is realized by utilizing the power dividing characteristics of the planet gears; when two paths of power are transmitted, the spur gears are used to improve the transmission efficiency; the main motor is used for realizing electric drive; and the engine load optimization or auxiliary drive is realized by changing the operating mode of the regulating motor. The integrated design of the system is compact, and the system is particularly suitable for front-engine vehicles; and the adopted five-gear automatic transmission gear structure has the advantages of simple shifting logic, a few shifting elements, high transmission efficiency and the like; and by various operating modes, the system can meet requirements of various working conditions.

An automatic transmission comprises: a double clutch comprising a first clutch and a second clutch, a first input shaft connected to the first clutch, a second input shaft connected to the second clutch through the first input shaft, and an output shaft. The automatic transmission also comprises a synchronizer, a one-way clutch, and a gear reduction mechanism including a first gear set and a second gear set. The first gear set comprises a first gear and a second gear meshed with each other, and the second gear set comprises a third gear and a fourth gear meshed with each other. The third gear is fixed on the second input shaft through the one-way clutch, and the synchronizer is fixed on the second input shaft. The automatic transmission and a vehicle including the automatic transmission are characterized in that the one-way clutch is disposed between the third gear and the second input shaft to prevent power from being transmitted to the second input shaft from the output shaft through the second gear set. Furthermore, wear of the double clutch is effectively reduced, and the service life of the double clutch is increased.

The invention provides an EPS semi-automatic gear-shifting system. A clutch actuator is controlled to work through an electronic device between a handle manipulating assembly and a transmission so as to save part of mechanical mechanism connection, and an installing space is saved; on the premise that a gear transmission main tank is not changed, only a gear-selecting and gear-shifting actuator assembly is arranged outside a transmission upper cover, the actuator is controlled to work through a controller, and the goal of gear selection and gear shifting is achieved. Compared with traditional pure manual transmissions, according to the system, a clutch pedal can be trod and is not trod, and automatic separation and connection motion of a clutch is finished through a vehicle-mounted computer when the clutch pedal is not trod; due to the fact that electronic control and pneumatic execution are adopted, the EPS semi-automatic gear-shifting system can be simplified on the basis of an existing gear-shifting control system, gear-shifting control force is relieved, gear-shifting finish touch prompt is provided, and the gear-shifting response speed and gear accuracy are improved. Due to the fact that semi-automatic transmission control is adopted, the EPS semi-automatic gear-shifting system has the advantages of both a manual transmission and an automatic transmission, such as a fast pace in manual transmission driving and comfort and safety of the automatic transmission.

A method of controlling a drive-train of a motor vehicle, which comprises an internal combustion engine with a driveshaft, an electric machine in driving connection with the driveshaft of the internal combustion engine, a semi-automatic transmission with an input shaft and a plurality of gears that can be engaged selectively, and an automated friction clutch arranged between the driveshaft of the internal combustion engine and the input shaft of the transmission, such that a gearshift of the transmission occurs in combination with suitable control of the internal combustion engine while the friction clutch is at least partially and/or briefly engaged. To speed up the shifting process and to attenuate torque and speed surges during the shifting process, the electric machine is operated briefly as a generator and/or as a motor.

The invention provides a gear shifting control method of a mechanical automatic transmission, which belongs to the technical field of automatic control of an automobile. The optimal dynamic or economical gear shifting operating point of an engine has been actually missed already even if gear shift is carried out when a vehicle meets the gear shifting condition as a result of mechanical delay of conventional mechanical automatic transmission during gear shift. The technical scheme provided by the invention is that the method comprises the steps of: calculating time from current start of operation to the gear shift point of the vehicle by current velocity and acceleration of the vehicle; comparing the time with the time of a clutch executing mechanism which travels freely; and controlling the clutch executing mechanism to travel freely in advance so that the clutch executing mechanism is in a standby state, therefore, the response time of a clutch is effectively shortened, and the economical efficiency and dynamic property of the vehicle are improved.

An electric actuator for an automatic transmission includes an adapter to transmit rotary motion between the adapter and the transmission. An electric motor has an output shaft operably connected the adapter by a gear set which includes a ring gear. A release mechanism includes a solenoid which selectively moves a lock member. In a first position, the lock member engages the ring gear to lock the ring gear so that the adapter is rotated by rotary motion of the output shaft and the adapter rotates to a predetermined zone about a desired gear position. In a second position, the lock member is out of engagement with the ring gear to permit rotation of the ring gear so that the adapter is rotated by internal forces of the transmission and the adapter automatically self-aligns to the exact desired gear position when the adapter is within the predetermined zone.

The invention relates to the technical field of vehicle running control, and discloses an automatic transmission control method. The automatic transmission control method comprises the steps that theaccelerator opening degree change rate of the current running state of a vehicle is acquired; whether the vehicle enters in a rapid accelerating state or not according to the accelerator opening degree change rate, and if the vehicle enters in the rapid accelerating state, the state of a hydraulic torque converter is acquired; if the hydraulic torque converter is in a locked state, a locking clutch is controlled to conduct a locking releasing action on the hydraulic torque converter to enable the hydraulic torque converter to release locking; the locking clutch is controlled to maintain the locking releasing action on the hydraulic torque converter in the preset time; whether the time that the locking clutch maintains the locking releasing action on the hydraulic torque converter reaches the preset time or not; and if the time reaches the preset time, the locking clutch is controlled to conduct a locking action on the hydraulic torque converter to enable the hydraulic torque converterto be locked. According to the automatic transmission control method, the problem that impact is generated due to the fact that the accelerator opening degree of an automatic transmission is increasedis solved, and the whole vehicle running steadiness is improved.

The invention relates to a power transmission mechanism for a double-clutch automatic transmission for an automobile. The power transmission mechanism comprises a power input shaft, an odd shift clutch input shaft, a first auxiliary shaft, a second auxiliary shaft, a middle shaft, a reverse gear idler shaft, an odd shift clutch, an even shift clutch, and a differential; the left end of the power input shaft is provided with a sun gear, a planetary gear, an internal gear ring, and a fixed planet carrier; an internal gear ring external gear is fixed outside the internal gear ring; the second auxiliary shaft is provided with an even shift driving gear, a reverse gear driving gear and an even shift synchronizer; the middle shaft is provided with a driven gear and first and second reverse gear driven gears; and the reverse gear idler shaft is provided with first and second reverse gear idler gears. The transmission mechanism is simple and is high in integrated level, and manufacturing cost of the double-clutch automatic transmission is reduced to certain extent.

A transmission having a main transmission and a splitter group, and including at least four spur gear planes formed with a countershaft and at least five shifting elements for engaging at least six gears between the transmission input and output shafts. When shifting between gears with the highest and the second-highest gear ratios, a shift occurs in the shifting elements associated with the splitter group but not in the shifting elements associated with the main transmission, whereas when shifting between gears with the lowest and second-lowest gear ratios, a shift occurs in the shifting elements associated with the main transmission but not in the shifting elements associated with the splitter group. An electric machine can be connected by a gearset, and depending on its shift position, the gearset acts as a pre-transmission ratio for the electric machine or as a superimposition transmission.

The invention provides a gear shift point calibration method, device and system of an automatic transmission, and relates to the technical field of automatic gear shift control of automobiles. The problem that in case of low-temperature start of an engine, the riding comfort is poor due to poor quality of gear shift of an automatic transmission is solved. The gear shift point calibration method of the automatic transmission comprises the steps of obtaining the maximum rotation speed of the engine in case of low-temperature start of the engine, and determining the maximum input rotation speed of the automatic transmission according to the maximum rotation speed of the engine, specifically, the maximum input rotation speed of the automatic transmission is equal to the maximum rotation speed of the engine; working out the maximum output rotation speed of the automatic transmission when the automatic transmission is at the first gear according to the maximum input rotation speed of the automatic transmission; and calibrating the maximum output rotation speed of the automatic transmission as the rotation speed of the gear shift point, from the first gear to the second gear, of the automatic transmission at the zero throttle. The gear shift point calibration method of the automatic transmission is applicable to automatic transmissions.

Disclosed therein is an automatic speed control system for a manual transmission. Clutch operating means using a combination of a motor and gears, transmission lever operating means using a combination of a motor and gears, and a control part, which check a driving state of a vehicle in real time and controls the motor if gear-shifting is needed, are additionally mounted to a general manual transmission, so that the general manual transmission can automatically shift the gear like an automatic transmission.

The invention discloses a seven-gear planetary automatic transmission. The seven-gear planetary automatic transmission comprises an input component, an output component, five transmission components, four brakes, two clutches and four planetary gear trains. The automatic transmission adopts the scheme with the four planetary gear trains, the four brakes and the two clutches and is provided with seven forward gears and two reversing gears. The structure is simple and compact, and the space occupied by the transmission is reduced; and the transmission ratio range is wide, the clearance ratio is low, and power of an engine is fully and advantageously utilized under different working conditions.