Method and device for judging mistakenly stepping on accelerator pedal

Abstract

The invention discloses a method and a device for judging mistakenly stepping on an accelerator pedal. According to the judgment method, the accelerator pedal still has the additional stroke after the normal stroke, the accelerator mechanism is configured to set the transition resistance threshold value for the normal stroke to enter the additional stroke, the transition resistance threshold value is obviously larger than the maximum resistance of the normal stroke and smaller than the foot strength of a driver, and the driver with sober consciousness can obviously perceive and cannot step by mistake; an unconscious driver has enough foot force to step the accelerator pedal into the additional stroke, and whether the accelerator pedal is stepped by mistake can be judged by detecting whether the accelerator pedal enters the additional stroke or not through the detection element; the judgment device is provided with an accelerator mechanism according to a judgment method, an accelerator connecting rod with a torque limiting function or a resistance device can be adopted, setting of a transition resistance threshold value can be equivalently achieved, an accelerator pedal mistaken stepping signal is output when it is detected that an accelerator pedal enters the additional stroke, and the judgment device can be used for braking or electrically connected to a brake control unit for automatic braking.

Description

Technical Field

[0001] The invention relates to the field of automobile engineering, and in particular to automobile emergency automatic braking control technology. Background Art

[0002] Accidents in which drivers mistakenly press the accelerator pedal for the brake pedal, causing personal injury and property damage, often occur. How to take technical measures to avoid or reduce the damage caused by such accidents has become a difficult problem that society is eager to solve.

[0003] In this document, "accelerator pedal misapplication" refers to the driver mistakenly pressing the accelerator pedal instead of the brake pedal.

[0004] Some cars currently in production are equipped with an Automatic Emergency Brake (AEB) system. The AEB system detects the distance to the obstacle ahead, the speed of the vehicle, etc. and performs calculations. When the calculation results determine that the vehicle may hit the obstacle ahead, a brake signal is sent to the brake control unit, and the vehicle automatically brakes. In other words, the brake control unit receives the brake signal and the vehicle can brake automatically.

[0005] Therefore, based on the existing technology, if it is possible to accurately determine whether the accelerator pedal is accidentally stepped on and send a judgment signal to the brake control unit, the vehicle can automatically brake if the accelerator pedal is accidentally stepped on, thereby avoiding or reducing accident damage caused by accidentally stepping on the accelerator pedal.

[0006] The prior art has different automatic brake control devices and methods for mis-stepping on the accelerator pedal or devices and methods for preventing mis-stepping on the accelerator pedal, which have different shortcomings or defects. For example, the Chinese invention patent CN118439042A, whose application was published on August 6, 2024, needs to collect the accelerator pedal opening, the change value of the accelerator pedal opening, the vehicle speed, the slope of the vehicle, etc. for normalization processing, and make decisions through clustering judgment through the kmeans algorithm. There are many shortcomings such as collecting signals, complex algorithms, difficult to quantify thresholds, and high hardware equipment requirements; the Chinese invention patent CN110758355A, whose application was published on February 7, 2020, uses non-Newtonian fluids as accelerator pedal mis-stepping braking auxiliary devices. There are many types of non-Newtonian fluids, and there are many factors that affect shear stress. The acceleration of stepping on the accelerator pedal (i.e., the shear rate borne by the non-Newtonian fluid) is difficult to quantify. It is difficult to prepare suitable non-Newtonian fluids and make them into universal components. Other methods have one or more of the shortcomings such as complex principles, high costs, low judgment accuracy, and difficulty in implementation. Summary of the invention

[0007] The purpose of the present invention is to use simple parts and components to achieve high reliability judgment of mis-stepping on the accelerator pedal in a simple combination. The judgment result can be electrically connected to other control units for controlling the brakes or connecting mechanical components for braking; it can be used in new car manufacturing and also conveniently used in old car modification. The present invention is suitable for fuel vehicles, electric vehicles, hybrid vehicles, fuel cell vehicles, etc.

[0008] The accelerator pedal, also known as "accelerator" or "accelerator pedal", the corresponding parts of electric vehicles or hybrid vehicles are also called "electric accelerator pedal", etc., are generally referred to as "accelerator pedal" in this document, and the "accelerator pedal" in this document specifically refers to the plate in the vehicle that is stepped on by the foot for controlling the vehicle speed, and does not include the throttle connecting rod and other components of the suspended (hanging) throttle mechanism or the reset components and other components of the floor throttle mechanism; whether it is for fuel vehicles, electric vehicles, hybrid vehicles or fuel cell vehicles, this document refers to the mechanism composed of the accelerator pedal and other components in the vehicle for controlling the vehicle speed as a "throttle mechanism"; for the suspended throttle mechanism, the component with one end fixed to the accelerator pedal and the other end hinged to the vehicle body is called a "throttle connecting rod"; the component of the throttle mechanism equipped with a reset elastic member is called a "reset component", and for the electronic throttle, the reset component may also be equipped with a throttle position sensor.

[0009] When the throttle mechanism controls the vehicle to drive normally, the full stroke of the throttle pedal's active range is called the "normal stroke", the throttle pedal's position when the throttle pedal is not pressed is called the "normal stroke start", and the other end corresponding to the normal stroke start is called the "normal stroke end"; for a suspended throttle, the throttle linkage's normal stroke start and normal stroke end correspond to the throttle pedal's normal stroke start and normal stroke end.

[0010] Vehicle brakes, also known as "brakes", are referred to as "brakes" in this document; brake pedals, also known as "brakes" or "brake pedals", are referred to as "brake pedals" in this document.

[0011] The accelerator pedal of existing vehicles is limited when it is stepped on to the end of the normal stroke (the resistance can be regarded as infinite), so it is impossible to distinguish whether the driver's stepping on the accelerator pedal to the end of the normal stroke is a normal need or an accidental stepping on the accelerator pedal. If the resistance after the end of the normal stroke is reduced and the resistance is less than the driver's foot force, the driver can step on the accelerator pedal into another range (this document refers to this range as "extra stroke") with more force, and the detection element can be used to detect the accelerator pedal entering the extra stroke to determine whether the driver has stepped on the accelerator pedal by mistake.

[0012] The accelerator pedal is forced to move from the normal stroke start to the normal stroke end, and the stroke beyond the normal stroke end is called "extra stroke". For the throttle linkage of the suspended throttle: ——If the throttle linkage is not deformed, the additional travel of the throttle linkage corresponds to the additional travel of the accelerator pedal; ——If the throttle connecting rod is deformed, the relative position between the part of the rod section fixed to the throttle pedal and the throttle pedal remains unchanged, and the additional stroke of the throttle pedal corresponds to the additional stroke of the part of the rod section, that is, the additional stroke of the throttle connecting rod at this time refers to the additional stroke of the part of the rod section. Detecting whether the throttle connecting rod enters the additional stroke is to detect whether the part of the rod section enters the additional stroke.

[0013] "Force" or "positive force" refers to the force in the same direction as the force applied when the foot is pressing the accelerator pedal during normal driving.

[0014] If the accelerator pedal entering the extra stroke is judged as an accidental step on the accelerator pedal, the accelerator pedal should not be stepped on to enter the extra stroke during normal driving. If a larger transition resistance is set from the normal stroke to the extra stroke, this transition resistance is larger than the maximum resistance of the normal stroke, and is large enough to alert the driver. A conscious driver will not use force to overcome this resistance, and thus will not step on the accelerator pedal to enter the extra stroke. That is, when the accelerator pedal transitions from the normal stroke to the extra stroke, a transition resistance threshold needs to be set. The transition resistance threshold is larger than the maximum resistance of the normal stroke. In order for the driver to clearly distinguish between the normal stroke and the extra stroke, it is recommended that the resistance be greater than 1.2 times the maximum resistance of the normal stroke.

[0015] When an unconscious driver presses hard, the accelerator pedal needs to enter an additional stroke, so the transition resistance threshold must be less than the driver's foot force. Referring to the provisions of Section 7.2.9 of the "Technical Conditions for Motor Vehicle Operation Safety" (GB7258-2017) that the brake pedal force of passenger cars shall not exceed 500N and other motor vehicles shall not exceed 700N, it means that the driver's foot force can reach 700N, and it is recommended that the transition resistance threshold should not exceed 700N.

[0016] The maximum resistance of the accelerator pedal in normal travel is equal to the maximum pedal force of the accelerator mechanism. The maximum pedal force of the accelerator mechanism can be measured by a pedal force sensor and is usually around 30N to 70N.

[0017] The key point of the present invention is that the transition resistance and the resistance of the normal stroke of the throttle mechanism can be clearly distinguished by a sober driver and the throttle pedal cannot be easily stepped into the extra stroke. It can be seen that the transition resistance threshold does not need to be accurately set, and can be determined within a rough numerical range. There is no strict requirement for the stability of the transition resistance threshold, especially when the transition resistance threshold is much larger than the maximum resistance value of the normal stroke. The maximum resistance of the normal stroke in this document refers to any measurement result, calculation result or estimation result of the maximum resistance of the normal stroke of the throttle pedal, which can be an approximate value. The maximum resistance of the normal stroke is a static value; the transition resistance threshold is a static value.

[0018] The transition resistance threshold can be determined by an experimental method to verify that the transition resistance threshold can enable a conscious driver to clearly distinguish between the normal range and the extra range and to forcefully step on the accelerator pedal into the extra range.

[0019] This document refers to the movement of the accelerator pedal or accelerator linkage from the normal travel to the additional travel direction as "advancement", and the movement of the accelerator pedal or accelerator linkage from the end of the normal travel to the additional travel as "transition".

[0020] The technical solution of the judgment method of the present invention is based on the above ideas.

[0021] A method for judging whether an accelerator pedal is accidentally stepped on, comprising: The invention comprises a throttle mechanism and a detection element, wherein the throttle mechanism comprises an accelerator pedal, and the accelerator pedal has a normal stroke and an extra stroke; The throttle mechanism is configured to set a transition resistance threshold of the throttle pedal from a normal stroke to an additional stroke, wherein the transition resistance threshold is greater than 1.2 times the maximum resistance of the normal stroke and less than 700N; Detecting the accelerator pedal position by the detection element; When the detection element detects that the accelerator pedal has not entered the additional stroke, it is determined that the accelerator pedal is not stepped on by mistake; When the detection element detects that the accelerator pedal enters an additional stroke, it is determined that the accelerator pedal is incorrectly depressed.

[0022] The positions of the throttle connecting rod and the throttle pedal correspond to each other, and detecting the throttle pedal position can be replaced by detecting the throttle connecting rod position, or detecting both positions at the same time. The phrase "detecting the throttle pedal position" in the present invention cannot be understood as a limitation to the claims.

[0023] The detection element may be an electrical element, an electromagnetic element, a photoelectric element, a distance sensor, a pressure sensor, a mechanical component, etc. The use of electrical elements, electromagnetic elements, photoelectric elements, distance sensors, pressure sensors, etc. to detect the position of a mechanical component is understandable and achievable by ordinary technicians in the field; the use of mechanical components to detect the position of other mechanical components will be illustrated in the embodiments.

[0024] The present invention describes that the judgment is made based on whether the accelerator pedal enters the additional stroke. Of course, the judgment can also be made based on whether the accelerator pedal leaves the normal stroke. This should not be understood as a limitation to the claims.

[0025] The present invention uses whether the accelerator pedal enters the extra stroke for judgment, and there are different implementation methods, such as using a component or connection with lower strength in the accelerator mechanism, so that the driver's foot force exceeds its strength, and the accelerator pedal is separated from other components of the accelerator mechanism, which can realize the present method. It can judge the accidental stepping of the accelerator pedal and apply the signal to the brake, avoiding or reducing the accident damage caused by the accidental stepping of the accelerator pedal, even if the accelerator mechanism is damaged, it is also valuable.

[0026] Configuring the throttle mechanism means that certain parts of the throttle mechanism adopt functional parts, or functional parts are installed around the throttle mechanism, so that the throttle pedal enters an additional stroke when the force applied exceeds the transition resistance threshold.

[0027] According to the judgment method of the present invention, the overall technical solution of the device for judging the mis-stepping of the accelerator pedal can be obtained.

[0028] A device for judging whether an accelerator pedal is pressed incorrectly, comprising: The invention comprises a throttle mechanism and a detection element, wherein the throttle mechanism comprises an accelerator pedal, and the accelerator pedal has a normal stroke and an extra stroke; The throttle mechanism is configured to set a transition resistance threshold of the throttle pedal from a normal stroke to an additional stroke, wherein the transition resistance threshold is greater than 1.2 times the maximum resistance of the normal stroke and less than 700N; The detection element detects the position of the accelerator pedal; When the detection element detects that the accelerator pedal has not entered the additional stroke, the detection element does not output a mis-pressed accelerator pedal signal; When the detection element detects that the accelerator pedal enters an additional stroke, the detection element outputs a mis-operation accelerator pedal signal.

[0029] The method for realizing the device is that for the suspended throttle mechanism, a throttle connecting rod with a torque limiting function is used, and there is a moment center on the throttle connecting rod. A limit component is set in the interval corresponding to the two ends of the throttle connecting rod (excluding the two ends, the same below), and the limit component limits the throttle connecting rod whose torque transmission function has not failed to advance to the normal stroke terminal and cannot enter the additional stroke. The limit component can be installed on the throttle connecting rod or fixed on the vehicle body. The transition resistance threshold is equivalently set as the torque threshold by applying the method of calculation based on mechanical principles or verification through physical tests. When the throttle pedal is positively stressed and the equivalent moment center torque is less than or equal to the moment threshold, the throttle connecting rod torque transmission function is normal; when the throttle pedal is positively stressed and the equivalent moment center torque is greater than the moment threshold, the throttle connecting rod torque transmission function fails, the throttle connecting rod is deformed, and the throttle connecting rod will twist or rotate around the moment center, and the throttle pedal and the part of the throttle connecting rod section fixed to the throttle pedal enter the additional stroke.

[0030] The failure of the throttle linkage's torque transmission function means that the throttle linkage is subjected to a force that causes the torque at the center of the moment to exceed the maximum torque it can withstand, causing the throttle linkage to deform around the center of the moment, losing or reducing its ability to transmit torque. The torque transmission function is normal, which means that the torque transmission function has not failed.

[0031] The setting of the transition resistance threshold is equivalent to the setting of the centroid torque threshold, and the setting can be verified through physical tests. After the throttle mechanism is configured, the pedal force sensor is used to measure. When the pedal force of the accelerator pedal reaches the set transition resistance threshold, the throttle linkage torque transmission function fails, and the torque threshold setting is achieved.

[0032] There are many ways to implement the throttle linkage torque limiting function. The throttle linkage can be implemented by processing weak points on the throttle linkage to form a stress concentration point (centre of moment), or by hinged connection of the torque limiting component using a torque wrench. When the centroid torque exceeds the torque threshold, the throttle linkage will twist or rotate around the centroid.

[0033] Since the centroid moment exceeds the torque threshold, the throttle connecting rod will produce torsion or rotation deformation around the centroid, and the throttle pedal enters the additional stroke. At this time, only the part of the rod that is fixed to the throttle pedal and whose relative position remains unchanged enters the additional stroke, and "the throttle connecting rod enters the additional stroke" refers to the part of the rod that enters the additional stroke.

[0034] A further solution 1 can be derived based on the overall technical solution for implementing the present device.

[0035] A further embodiment 1 is characterized in that it further comprises: Limiting components; The throttle mechanism further comprises a throttle connecting rod, and the throttle connecting rod has a torque limiting function; The method for configuring the throttle mechanism includes installing the limit component in the interval corresponding to the two ends of the throttle link, and the limit component limits the throttle link whose torque transmission function has not failed to move forward to the terminal end of the normal stroke but cannot enter the additional stroke, and the centroid torque threshold of the positive force of the throttle link is equivalently set according to the transition resistance threshold.

[0036] For floor-type throttle mechanisms and suspension-type throttle mechanisms, this solution can be implemented by setting a resistance component, which can be installed on the vehicle body or on the throttle mechanism. The resistance component causes the throttle pedal to suddenly increase its resistance when it moves to the end of the normal stroke. The resistance of the resistance component and the resistance of the throttle mechanism when entering the additional stroke together constitute the transition resistance. Because the transition resistance threshold does not need to be accurately set, the resistance of the throttle mechanism when entering the additional stroke can be considered as the maximum resistance of the normal stroke, so that the resistance threshold of the resistance device is calculated by subtracting the maximum resistance of the normal stroke from the transition resistance threshold.

[0037] The resistance threshold of the resistance component can also be set by experimental method. After the resistance component is installed, the pedal force sensor is used for measurement. The pedal force measured when the accelerator pedal transitions from normal stroke to extra stroke is the transition resistance. When the measured transition resistance does not meet the set value of the transition resistance threshold, the resistance of the resistance component is adjusted until the set requirements are met, thus achieving the transition resistance threshold setting.

[0038] A further solution 2 can be derived based on the overall technical solution for implementing the present device.

[0039] A further solution 2 is characterized in that it also includes: Resistance components; The method for configuring the throttle mechanism includes installing the resistance component, the resistance of the resistance component takes effect at a boundary position where the throttle linkage moves from the normal stroke to the additional stroke, and the resistance component and the throttle mechanism are combined to set the transition resistance threshold.

[0040] Optimally, if the accelerator pedal moves forward to a point close to the normal travel terminal and / or is at the normal travel terminal, the vehicle emits an audible and visual signal warning, which is more conducive to reminding the driver that if it is normal driving, the driver is conscious and will no longer step on the accelerator pedal hard.

[0041] Since the throttle linkage of the suspended throttle mechanism needs to follow the throttle pedal into the additional stroke, a throttle mechanism that limits the throttle linkage from entering the additional stroke cannot be used, that is, there should be no dead point to limit the throttle linkage from entering the additional stroke; for electronic throttles, when the throttle position sensor rotates to the end of the normal stroke, there should be no dead point to limit the sensor from continuing to rotate; for cable throttles, after the throttle plate rotates to the maximum angle, there should be no dead point to limit the throttle plate from continuing to rotate. There are similar requirements for floor throttles. In addition, the body or equivalent body components should not limit the throttle pedal or throttle linkage from entering the additional stroke.

[0042] The beneficial effects of the present invention are: the judgment method is concise, the device structure is simple, the threshold is easy to quantify, it can be mass-produced, it has the characteristics of high detection reliability and low implementation cost, it can be used in new car production, and it is also convenient for old car reconstruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of the throttle mechanism components; FIG2 is a schematic diagram of Embodiment 1 of “a device for determining whether the accelerator pedal is mis-stepped” of the present invention; FIG3 is a schematic diagram of Embodiment 2 of “a device for determining whether the accelerator pedal is mis-stepped” of the present invention; FIG4 is a schematic diagram of Embodiment 3 of “a device for determining whether the accelerator pedal is mis-stepped” of the present invention; FIG5 is a schematic diagram of Embodiment 4 of “a device for determining whether the accelerator pedal is mis-stepped” of the present invention; FIG. 6 is a schematic diagram of Embodiment 5 of “a device for determining whether the accelerator pedal is mistakenly stepped on” of the present invention. DETAILED DESCRIPTION

[0044] The determination method in the present invention is implemented by a device. To more clearly explain the implementation method of the determination device in the present invention, the implementation example of the present invention is described in conjunction with the accompanying drawings. The directional words in the description are determined according to the directions in the accompanying drawings and do not represent the directions in actual implementation.

[0045] FIG1 is a schematic diagram of the throttle mechanism components, wherein 100 is the cab where the suspended throttle mechanism is located, 101 is the throttle pedal, 102 is the throttle connecting rod, 103 is the hinge point between the throttle connecting rod and the vehicle body, and 104 is the throttle mechanism reset component; 200 is the cab where the floor-type throttle mechanism is located, 201 is the throttle pedal, 202 is the throttle mechanism reset component, and 203 is the throttle pedal reset force base plate.

[0046] FIG2 is a schematic diagram of Embodiment 1 of the "device for judging whether the accelerator pedal is mis-stepped" of the present invention, in which the accelerator mechanism is a suspension type. In the schematic diagram of FIG2, 100, 101, 102, 103, and 104 are the same as FIG1, 500 is a normal stroke, 501 is an extra stroke, 20 is a limit component, 21 is a detection rod for the accelerator pedal to enter the extra stroke, 22 is a reset spring for the detection rod, 23 is a sliding hinge support, 24 is a straight rod, 25 is a brake pedal, 26 is a brake pedal connecting rod, 27 is a brake vacuum booster pump, in the I enlarged view, A-direction view, and BB cross-sectional view, 1021 is an upper section of the accelerator connecting rod, 1022 is a lower section of the accelerator connecting rod, 1023 is a hinge point (i.e., a moment center) between the upper section 1021 of the accelerator connecting rod and the lower section 1022 of the accelerator connecting rod, 1024 is a tongue-shaped member, and 1025 is a moment adjustment spring. The throttle link 102 , which is composed of the throttle link upper section 1021 , the throttle link lower section 1022 , the inter-section hinge point 1023 , the tongue-shaped piece 1024 and the torque adjustment spring 1025 , has a torque limiting function, and the torque threshold can be adjusted and set by the torque adjustment spring 1025 .

[0047] The force on the accelerator pedal 101 is equivalent to the force torque of the inter-segment hinge 1023. When the positive force torque is less than or equal to the torque threshold, the accelerator link 102 completely transmits the torque, and the accelerator link 102 and the accelerator pedal 101 move within the normal travel 500, or are limited by the position-limiting component 20 and cannot move forward; when the positive force torque is greater than the torque threshold, the torque transmission function of the accelerator link 102 fails, and the accelerator pedal 101 rotates around the inter-segment hinge 1023 to enter the additional travel 501. At this time, only the lower section 1022 of the accelerator link, which is fixed to the accelerator pedal 101 and whose relative position remains unchanged, enters the additional travel. "The accelerator link enters the additional travel" means that the lower section 1022 of the accelerator link enters the additional travel.

[0048] The accelerator pedal 101 enters the additional stroke 501 and presses the detection rod 21. The detection rod 21 overcomes the resistance of the detection rod return spring 22 and moves to the left, pressing the straight rod 24. Since the upper end of the straight rod 24 is a sliding hinge and the lower end is hinged to the brake connecting rod, the brake connecting rod 26 is driven by the straight rod 24 to move to the left, acting on the brake vacuum booster pump 27 to play a braking role, thereby realizing not only the judgment of accidentally stepping on the accelerator pedal, but also automatic braking when the accelerator pedal is accidentally stepped on.

[0049] For example, for a certain vehicle model, the maximum resistance of the normal travel is measured by the pedal force sensor as 35N, and the transition resistance threshold can be set to 300N, which can make the driver in the awake state clearly alert and will not apply more force to step on the accelerator pedal into the extra travel. However, if the driver is not conscious, he can step on the accelerator pedal into the extra travel by applying force. The force arm from the fixed point of the accelerator pedal 101 and the accelerator connecting rod 102 to the inter-segment hinge point (i.e., the moment center) 1023 is 0.08m, and the torque threshold can be calculated to be 24N·m, that is, the set torque threshold is 24N·m.

[0050] The torque threshold can be set by experiment. A pedal force sensor is used to measure the pedal force of the accelerator pedal 101 when the torque transmission function fails. The torque adjustment spring 1025 is adjusted. When the pedal force of the accelerator pedal 101 is 300N, the torque threshold is set.

[0051] In the first embodiment, the detection element is a detection rod, which is a mechanical component. The combination of mechanical components such as a steel wire rope and a pulley can also realize the judgment of the accidental stepping on the accelerator pedal and automatic braking.

[0052] FIG3 is a schematic diagram of Embodiment 2 of the "device for judging whether the accelerator pedal is mis-stepped" of the present invention, in which the accelerator mechanism is a suspension type. In the schematic diagram of FIG3, 100, 101, 102, 103, and 104 are the same as FIG1, 500 is a normal stroke, 501 is an additional stroke, 30 is a limit component, 31 is a limit switch, 32 is an articulated connecting rod group, and in the enlarged view of II, 33 is a notch. The limit component 30 is a rigid component fixed on the accelerator connecting rod (with sufficient strength and rigidity without deformation), the articulated connecting rod group 32 is to prevent the accelerator pedal from being separated from the accelerator mechanism after the accelerator connecting rod 102 is broken, and the notch 33 is a stress concentration point (i.e., the moment center) processed according to the torque limiting function.

[0053] The force on the accelerator pedal 101 is converted into the force torque of the stress concentration point 33. When the positive force torque is less than or equal to the torque threshold, the accelerator link 102 completely transmits the torque, and the accelerator link 102 and the accelerator pedal 101 move within the normal stroke 500, or are limited by the position-limiting component 30 and cannot move forward; when the positive force torque is greater than the torque threshold, the accelerator link 102 breaks at the stress concentration point 33, and the torque transmission function of the accelerator link 102 fails. Due to the action of the articulated link group 32, the accelerator pedal 101 is still hung on the accelerator mechanism and enters the additional stroke 501. At this time, only the lower section of the accelerator link (the section below the stress concentration point 33) that is fixed to the accelerator pedal 101 and whose relative position remains unchanged enters the additional stroke. "The accelerator link enters the additional stroke" means that the lower section of the accelerator link enters the additional stroke.

[0054] The limit switch 31 is activated by the impact of the accelerator pedal 101, thereby outputting an electric signal indicating that the accelerator pedal is accidentally stepped on, which can be connected to an ECU (electronic control unit) or a brake control unit for automatic braking and other purposes.

[0055] For a certain vehicle model, the maximum resistance of normal travel is measured by the pedal force sensor as 40N, and the transition resistance threshold can be set to 600N. The throttle rod 102 is 0.2m long, the equivalent length from the fixed point of the throttle pedal 101 and the throttle rod 102 to the limit component 30 is 0.08m, and the length from the notch 33 to the throttle rod hinge point 103 is 0.07m. When the throttle pedal 101 is subjected to a force of 600N, the throttle rod hinge point 103 is subjected to a force of 400N, and the torque of the notch 33 is 28N·m, that is, the set torque threshold is 28N·m.

[0056] The torque threshold can be set by experiment. A pedal force sensor is used to measure the pedal force of the accelerator pedal 101 when the torque transmission fails. The shape and depth of the notch 33 are adjusted. When the pedal force of the accelerator pedal 101 is 600N, the torque threshold setting is achieved.

[0057] FIG4 is a schematic diagram of Embodiment 3 of the present invention "A device for judging whether the accelerator pedal is mis-stepped", in which the accelerator mechanism is a suspension type. In the schematic diagram of FIG4, 100, 101, 102, 103, and 104 are the same as FIG1, 500 is a normal stroke, 501 is an extra stroke, 41 is a resistance rod, and 42 is an accelerator position sensor with extra stroke detection.

[0058] When the force applied to the accelerator pedal 101 minus the maximum resistance in the normal stroke is ≤ the pressure bearing capacity of the resistance rod 41 that breaks (fails), the accelerator pedal 101 and the accelerator connecting rod 102 move within the normal stroke 500, or are blocked by the resistance rod 41 and cannot move forward; when the force applied to the accelerator pedal 101 minus the maximum resistance in the normal stroke is greater than the pressure bearing capacity of the resistance rod 41 that breaks (fails), the resistance rod 41 breaks (fails), and the accelerator pedal 101 drives the accelerator connecting rod 102 to enter the additional stroke 501.

[0059] The throttle position sensor 42 with additional stroke detection can be used to control vehicle travel within the normal stroke 500, and can also be used to detect whether the throttle connecting rod 102 and the throttle pedal 101 enter the additional stroke 501. The electrical signal detecting that the throttle connecting rod 102 enters the additional stroke 501 can be connected to the ECU or the brake control unit for automatic braking and other purposes.

[0060] The maximum resistance of a certain vehicle model in normal travel is measured by the pedal force sensor as 45N, and the transition resistance threshold is set to 400N. The pressure bearing capacity of the resistance rod 41 when it breaks (failed) is 400N-45N=355N, that is, the resistance threshold of the resistance rod 41 is 355N. The material and rod type can be selected as the resistance rod 41 according to the compression rod calculation of material mechanics, or the material and rod type of the resistance rod 41 can be determined through experiments.

[0061] FIG5 is a schematic diagram of Embodiment 4 of the "device for judging whether the accelerator pedal is mis-stepped" of the present invention, in which the accelerator mechanism is of floor type. In the schematic diagram of FIG5, 200, 201, 202, and 203 are the same as FIG1, 500 is the normal stroke, 501 is the extra stroke, 51 is the resistance component, 52 is the pressure sensor, and 2011 is the T-shaped plate attached to the accelerator pedal 201; in the enlarged view of III, 511 is the tongue-shaped portion, 512 is the spring, and 513 is the bracket, which together constitute the resistance component 51. As shown in the figure, when the T-shaped plate 2011 does not contact the two tongue-shaped portions 511, the minimum distance between the two tongue-shaped portions 511 is slightly smaller than the lateral width of the middle structural portion of the T-shaped plate 2011.

[0062] When the force applied to the accelerator pedal 201 minus the maximum resistance of the normal stroke is ≤ the resistance threshold of the resistance component 51, the T-shaped plate 2011 attached to the accelerator pedal 201 is blocked by the two tongue-shaped portions 511 and cannot be embedded between the two tongue-shaped portions 511. The accelerator pedal 201 moves within the normal stroke 500, or is blocked by the two tongue-shaped portions 511 and stops moving forward; when the force applied to the accelerator pedal 201 minus the maximum resistance of the normal stroke is greater than the resistance threshold of the resistance component 51, the T-shaped plate 2011 is embedded between the two tongue-shaped portions 511, and the accelerator pedal 201 enters the additional stroke 501.

[0063] The pressure sensor 52 is used as a detection element. When the accelerator pedal 201 enters the additional stroke 501, the T-shaped plate 2011 presses the pressure sensor 52 laterally, thereby detecting that the accelerator pedal 201 enters the additional stroke 501. The electrical signal of the pressure sensor 52 can be connected to the ECU or brake control unit after processing for automatic braking and other purposes.

[0064] The maximum resistance of a certain vehicle model in a normal stroke is measured by a pedal force sensor and is 60N. The transition resistance threshold is set to 350N, and the resistance threshold of the resistance component is 350N-60N=290N. The pedal force sensor can be used to measure, adjust, and set the resistance threshold of the resistance component 51. When the resistance of the throttle mechanism from the normal stroke 500 to the additional stroke 501 is 350N, the resistance threshold setting of the resistance component 51 is completed.

[0065] FIG6 is a schematic diagram of Embodiment 5 of the "device for judging whether the accelerator pedal is mis-stepped" of the present invention, in which the accelerator mechanism is a suspension type. In the schematic diagram of FIG6, 100, 101, 102, 103, and 104 are the same as FIG1, 500 is a normal stroke, 501 is an extra stroke, 61 is a resistance component, 62 is a counter-beam photoelectric sensor, and in the C-direction diagram, 611 is a resistance crossbar, and 612 is a support rod, which together constitute the resistance component 61.

[0066] When the force applied to the accelerator pedal 101 minus the maximum resistance during normal travel is less than or equal to the resistance threshold of the resistance component 61, the resistance cross bar 611 does not deform, and the accelerator pedal 101 and the accelerator connecting rod 102 move within the normal travel 500, or are blocked by the resistance cross bar 611 and stop moving forward; when the force applied to the accelerator pedal 101 minus the maximum resistance during normal travel is greater than the resistance threshold of the resistance component 61, the resistance cross bar 611 deforms and breaks, and the accelerator pedal 101 drives the accelerator connecting rod 102 into the additional travel 501.

[0067] The maximum resistance of a certain vehicle model in normal travel is measured by the pedal force sensor as 40N, and the transition resistance threshold is set to 350N. Therefore, the resistance threshold of the resistance component 61 is 350N-40N=310N. The pedal force sensor can be used to measure, adjust, and set the resistance threshold of the resistance component 61. When the resistance of the throttle mechanism from the normal travel 500 to the additional travel 501 is 350N, the resistance threshold setting of the resistance component 51 is completed.

[0068] The through-beam photoelectric sensor 62 is used as a detection element to detect whether the throttle link 102 has an additional stroke. The output electrical signal can be connected to an ECU (electronic control unit) or a brake control unit for automatic braking and other purposes.

Claims

1. A method for judging whether the accelerator pedal is pressed accidentally, characterized in that: include: The invention comprises a throttle mechanism and a detection element, wherein the throttle mechanism comprises an accelerator pedal, and the accelerator pedal has a normal stroke and an extra stroke; The throttle mechanism is configured to set a transition resistance threshold of the throttle pedal from a normal stroke to an additional stroke, wherein the transition resistance threshold is greater than 1.2 times the maximum resistance of the normal stroke and less than 700N; Detecting the accelerator pedal position by the detection element; When the detection element detects that the accelerator pedal has not entered the additional stroke, it is determined that the accelerator pedal is not stepped on by mistake; When the detection element detects that the accelerator pedal enters an additional stroke, it is determined that the accelerator pedal is incorrectly depressed.

2. A device for judging whether the accelerator pedal is pressed incorrectly, characterized in that: include: The invention comprises a throttle mechanism and a detection element, wherein the throttle mechanism comprises an accelerator pedal, and the accelerator pedal has a normal stroke and an extra stroke; The throttle mechanism is configured to set a transition resistance threshold of the throttle pedal from a normal stroke to an additional stroke, wherein the transition resistance threshold is greater than 1.2 times the maximum resistance of the normal stroke and less than 700N; The detection element detects the position of the accelerator pedal; When the detection element detects that the accelerator pedal has not entered the additional stroke, the detection element does not output a mis-pressed accelerator pedal signal; When the detection element detects that the accelerator pedal enters an additional stroke, the detection element outputs a mis-operation accelerator pedal signal.

3. The device for judging whether the accelerator pedal is pressed incorrectly according to claim 2, characterized in that: Also includes: Limiting components; The throttle mechanism further comprises a throttle connecting rod, and the throttle connecting rod has a torque limiting function; The method for configuring the throttle mechanism includes installing the limit component in the interval corresponding to the two ends of the throttle link, and the limit component limits the throttle link whose torque transmission function has not failed to move forward to the terminal end of the normal stroke but cannot enter the additional stroke, and the centroid torque threshold of the positive force of the throttle link is equivalently set according to the transition resistance threshold.

4. The device for judging whether the accelerator pedal is pressed incorrectly according to claim 2, characterized in that: Also includes: Resistance components; The method for configuring the throttle mechanism includes installing the resistance component, the resistance of the resistance component takes effect at a boundary position where the throttle linkage moves from a normal stroke to an additional stroke, and the resistance component and the throttle mechanism are combined to set the transition resistance threshold.

5. A device for determining if the accelerator pedal is mis-stepped according to any one of claims 2, 3 and 4, characterized in that: Also includes: It also comprises an acoustic and optical signal device, which sends an acoustic and optical prompt signal when the accelerator pedal moves from the normal stroke to a distance less than a preset threshold from the normal stroke terminal.

6. A device for determining if the accelerator pedal is mis-stepped according to any one of claims 2, 3 and 4, characterized in that: Also includes: It also comprises an acoustic and optical signal device, which sends out an acoustic and optical prompt signal when the accelerator pedal is located at the normal travel terminal.

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