CN112943887B - Vehicle brake control method and device - Google Patents
Vehicle brake control method and device Download PDFInfo
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- CN112943887B CN112943887B CN202110127071.8A CN202110127071A CN112943887B CN 112943887 B CN112943887 B CN 112943887B CN 202110127071 A CN202110127071 A CN 202110127071A CN 112943887 B CN112943887 B CN 112943887B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H41/00—Rotary fluid gearing of the hydrokinetic type
- F16H41/24—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
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Abstract
The invention provides a vehicle brake control method and device, relates to the field of vehicle braking, and aims to solve the technical problem of how to eliminate vehicle towering during vehicle braking. The device structure comprises a control unit, an acquisition module and a gearbox, wherein the working radius of the conical wheel of the gearbox is adjusted to ensure that the rotating speed of a turbine of a hydraulic torque converter is not higher than the rotating speed of an engine all the time, so that the vehicle is not crossed when braked, the change of the driving state of the vehicle is avoided, the absolute value of the deceleration of the vehicle is reduced, the driving force generated by the vehicle is prevented, and the condition of vehicle shrugging when the vehicle is braked is eliminated.
Description
Technical Field
The invention relates to the field of vehicle braking, in particular to a vehicle braking control method and device.
Background
At present, a plurality of vehicles are provided with a Continuously Variable Transmission (CVT), the connecting mode of the CVT and an engine mainly comprises a hydraulic torque converter and a multi-plate clutch, and the multi-plate clutch does not have the natural and smooth flexible transmission function of the hydraulic torque converter and has high starting requirement, so the hydraulic torque converter is usually selected.
The power transmission path of the vehicle sequentially comprises an engine, a hydraulic torque converter, a gearbox, a driving shaft and tires, wherein the gearbox is connected with the tires through the driving shaft, the hydraulic torque converter is rigidly connected with an input shaft of the gearbox, the rotating speed of a main cone pulley and a driven cone pulley of the gearbox is the rotating speed of the hydraulic torque converter, the speed ratio of the gearbox is continuously changed in the driving process, the speed ratio change rate is the reduction rate of the vehicle speed, the gearbox improves the rotating speed of a turbine of the hydraulic torque converter and the speed ratio change rate by increasing the working radius of the cone pulley, and the gearbox reduces the rotating speed of the turbine of the hydraulic torque converter and reduces the speed ratio change rate by reducing the working radius of the cone pulley.
When the vehicle enters a braking working condition, the vehicle can be driven in two driving states, namely, when the rotating speed of a turbine of the hydraulic torque converter is lower than the rotating speed of the engine, the engine drives the vehicle to run, and when the rotating speed of the turbine is higher than the rotating speed of the engine, the engine is in a reverse dragging state, and the engine does not provide driving force.
The vehicle is in a braking condition, the engine speed is always consistent with the turbine speed of the hydraulic torque converter when the hydraulic torque converter is not opened, the turbine speed of the hydraulic torque converter is higher than the engine speed when the vehicle is in the braking condition and the hydraulic torque converter is opened, the vehicle is in the second driving state, the turbine speed of the hydraulic torque converter, which is in direct proportion to the change of the vehicle speed, is gradually reduced along with the reduction of the vehicle speed, and the engine speed is basically unchanged, so that the turbine speed of the hydraulic torque converter crosses over the engine speed, namely the engine speed exceeds the turbine speed, after crossing, the vehicle is in the first state, the driving state of the vehicle is changed, the vehicle generates driving force, the absolute value of the deceleration of the vehicle is reduced, and the vehicle running feeling, namely the vehicle shakes, and the driving experience of a driver is reduced.
Disclosure of Invention
The invention provides a vehicle brake control method and a vehicle brake control device aiming at the problems in the prior art, and solves the technical problem of how to prevent vehicle rising during braking.
The invention is realized by the following technical scheme: a vehicle brake control method, characterized by comprising the steps of:
the control unit acquires braking force and vehicle speed information in real time;
the control unit judges whether the hydraulic torque converter is in a braking working condition or not, judges whether a towering prevention function condition is met or not when the braking working condition is met, checks a preset towering prevention tachometer according to the obtained braking force and the obtained vehicle speed information to obtain a hydraulic torque converter turbine rotating speed calibration value which is not higher than the rotating speed of an engine when the towering prevention function condition is met, outputs the hydraulic torque converter turbine rotating speed calibration value information to a gearbox controller after the calibration value is obtained, and adjusts the working radius of a gearbox cone wheel to adjust the hydraulic torque converter turbine rotating speed to the turbine rotating speed calibration value after the gearbox controller receives the hydraulic torque converter turbine rotating speed calibration value information.
The control unit judges whether the vehicle is in a braking working condition or not, when the vehicle is in the braking working condition, the control unit judges whether a towering prevention function condition is met or not, when the towering prevention function condition is met, the control unit searches a preset towering prevention rotating speed table according to the braking force and the vehicle speed information to obtain an execution unit input shaft rotating speed calibration value which is not higher than the rotating speed of an engine, after the control unit obtains the execution unit input shaft rotating speed calibration value, the control unit outputs the execution unit input shaft rotating speed calibration value information to a gearbox controller, the gearbox controller adjusts the working radius of a conical wheel of the gearbox to enable the rotating speed of a turbine of a hydraulic torque converter to be adjusted to the turbine rotating speed calibration value, after the execution unit input shaft rotating speed calibration value which is not higher than the rotating speed of the engine is obtained by searching the preset towering prevention table, the working radius of the conical wheel of the gearbox is adjusted to enable the rotating speed of the turbine of the hydraulic torque converter to be not higher than the turbine rotating speed when the braking and the towering prevention function is activated The vehicle does not cross when the vehicle is braked under the rotating speed of the engine, so that the driving state change of the vehicle is avoided, the absolute value of the deceleration of the vehicle is reduced, the vehicle is prevented from generating driving force, the phenomenon of vehicle rising when the vehicle is braked is eliminated, and the driving experience of a driver is improved.
In the vehicle brake control method, the control unit searches a preset anti-towering vehicle speed ratio filter coefficient table to obtain a speed ratio filter coefficient calibration value according to brake force information when in a brake working condition, the control unit outputs a speed ratio adjusting signal to the gearbox controller after obtaining the speed ratio filter coefficient calibration value, the gearbox controller controls the working radius of the conical wheel of the gearbox after receiving the speed ratio adjusting signal so that the speed ratio filter coefficient is adjusted to the speed ratio filter coefficient calibration value, when the speed ratio change rate is large, the driver has obvious deceleration feeling due to too fast speed reduction and the driving experience of the driver is influenced, the gearbox controller adjusts the working radius of the conical wheel after receiving the speed ratio adjusting signal so that the speed ratio filter coefficient is increased and the speed ratio change rate of the gearbox is controlled to be reduced, so that the driver does not feel deceleration change when the whole vehicle brakes, namely does not feel obvious vehicle deceleration feeling, the driving experience of the driver is improved.
In the vehicle brake control method, the step of judging whether the vehicle is in the brake working condition comprises the steps of judging the opening degree of the brake pedal, judging that the vehicle is in the brake working condition when the opening degree of the brake pedal is larger than 0, indicating that the vehicle is about to brake when the opening degree of the brake pedal is larger than 0, judging whether the vehicle is in the brake working condition, improving the accuracy of vehicle shrugging elimination when the vehicle brakes, and improving the driving experience of a driver.
In the vehicle brake control method, the judging whether the vehicle-shrugging elimination function condition can be activated comprises the steps of judging whether the brake force is moderate or below, turning on an enabling switch, enabling the brake switch to be in an activated state, setting the opening degree of an accelerator pedal to be 0 and setting the vehicle speed to be less than 20km/h, and only if all conditions are met, the vehicle-shrugging prevention function can be realized, so that the vehicle-shrugging feeling can be eliminated when the vehicle is braked, and the driving experience of a driver is improved.
In the vehicle braking control method, the braking force comprises a severe braking force, a moderate braking force and a light braking force, the severe braking force comprises a braking force larger than a first preset value, the moderate braking force comprises a braking force not larger than the first preset value and not smaller than a second preset value, the light braking force comprises a braking force smaller than the second preset value, the braking force generated by severe braking is far larger than a driving force, the problem of the car rising does not occur, the problem of the car rising occurs only when moderate braking and light braking are carried out, the moderate braking and light braking are distinguished to better adjust the cone pulley, therefore, the accuracy of the car rising phenomenon during vehicle braking is eliminated, and the driving experience of a driver is improved.
In the vehicle brake control method, the torque converter opening condition comprises that the vehicle speed is lower than the preset speed, and the torque converter opening condition is judged to enable the anti-towering function to be more accurately activated.
The invention also comprises the following scheme: a vehicle brake control device comprises a gearbox and a hydraulic torque converter and is characterized by further comprising an acquisition module for acquiring vehicle brake force and vehicle speed information in real time and a control unit for receiving the vehicle brake force and the vehicle speed information, wherein the gearbox comprises a controller and a bevel wheel, the acquisition module is connected with the input end of the control unit, the input end of the controller is connected with the output end of the control unit, the input end of the bevel wheel is connected with the output end of the controller, the output end of the bevel wheel is connected with the hydraulic torque converter, the control unit is used for searching a preset anti-towering vehicle rotating speed table according to the brake force and the vehicle speed information output by the acquisition module when the gearbox is in a brake working condition and meets an anti-towering vehicle function condition, obtaining a hydraulic torque converter turbine rotating speed calibration value which is not higher than the engine rotating speed and then outputting the hydraulic torque converter turbine rotating speed calibration value to the gearbox controller, and the gearbox controller receives the hydraulic torque converter turbine rotating speed calibration value information and then adjusts the working radius of the bevel wheel of the gearbox to enable the hydraulic torque converter to rotate the turbine rotating speed And adjusting to a turbine speed calibration value.
The acquisition module acquires the braking force and the vehicle speed information of a vehicle in real time and outputs the information to the control unit, the control unit judges whether the vehicle is in a braking working condition, when the vehicle is in the braking working condition, the control unit judges whether a vehicle-rise-prevention function condition is met, when the vehicle-rise-prevention function condition is met, the control unit checks a preset vehicle-rise-prevention rotating speed table according to the braking force and the vehicle speed information to obtain an execution unit input shaft rotating speed calibration value which is not higher than the rotating speed of an engine, the control unit outputs the execution unit input shaft rotating speed calibration value information to a gearbox controller after obtaining the execution unit input shaft rotating speed calibration value, the gearbox controller adjusts the working radius of a conical wheel of the gearbox to enable the rotating speed of a turbine of a pressure torque converter to be not higher than the rotating speed of the engine, the control unit controls the gearbox controller to adjust the working radius of the conical wheel according to a vehicle braking control method to enable the rotating speed of the turbine of the hydraulic torque converter to be adjusted to the calibrated value to eliminate the vehicle-rise when the vehicle is braked, the driving experience of the driver is improved.
In the vehicle brake control device, the acquisition module comprises a brake pressure sensor for outputting brake force information to the control unit and a vehicle speed sensor for outputting vehicle speed information to the control unit, the brake pressure sensor and the vehicle speed sensor are connected with the control unit in an input mode, the brake pressure sensor and the vehicle speed sensor are short in reaction time and accurate in output data, and the control unit can control the accuracy of adjustment of the execution unit.
In the vehicle brake control device, the vehicle brake control device further comprises an enable switch, a brake pedal opening sensor for outputting the opening of the brake pedal, and an accelerator pedal opening sensor for outputting the opening of the accelerator pedal, wherein the enable switch, the brake pedal opening sensor, and the accelerator pedal opening sensor are all connected with the input end of the control unit, the control unit detects whether the enable switch is in an open state, the control unit detects a brake switch state signal to judge whether the brake is in an activated state, the control unit receives the opening of the accelerator output by the accelerator opening sensor to judge whether the opening of the accelerator is 0, the control unit receives the brake force to judge whether the brake force is in a medium state or below, the control unit receives the vehicle speed output by the vehicle speed sensor to judge whether the vehicle speed is less than a preset speed or not, and when the conditions are all yes, the anti-towering function condition is met, the control unit detects whether the hydraulic torque converter is in an open state, the control unit receives the opening degree of the brake pedal output by the brake pedal sensor to judge whether the opening degree of the brake pedal is larger than 0, and if the opening degree of the brake pedal is larger than 0 and the pressure torque converter is open, the vehicle is judged to be in a braking working condition.
Compared with the prior art, the vehicle brake control method and the vehicle brake control device have the following advantages:
1. according to the invention, the rotating speed of the turbine of the hydraulic torque converter is not higher than the rotating speed of the engine by adjusting the working radius of the cone wheel, so that the vehicle does not pass through when braking, the absolute value of the deceleration of the vehicle is reduced due to the change of the driving state of the vehicle, the vehicle is prevented from generating driving force, the vehicle-rising condition when braking the vehicle is eliminated, and the driving experience of a driver is improved.
2. According to the invention, when the vehicle is in a braking working condition and meets the function condition of preventing the vehicle from rising, the control unit controls the execution unit to adjust the working radius of the cone pulley, so that the accuracy of eliminating the vehicle from rising during vehicle braking is improved, and the driving experience of a driver is improved.
Drawings
FIG. 1 is a schematic illustration of a vehicle braking control method of the present invention;
FIG. 2 is a comparison of the correction effects of the present invention;
fig. 3 is a schematic structural diagram of a vehicle brake control device of the present invention.
In the figure 1, an acquisition module; 11. a brake pressure sensor; 12. a vehicle speed sensor; 2. a control unit; 3. a gearbox; 31. a controller; 32. a cone pulley; 4. an enable switch; 5. a brake switch; 6. an accelerator pedal opening sensor; 7. a brake pedal opening sensor; 8. a torque converter.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the steps of the present vehicle brake control method are as follows: the acquisition module 1 acquires braking force and vehicle speed information in real time and outputs the information to the control unit 2, the control unit 2 judges whether the vehicle is in a braking working condition, the judgment of the braking working condition comprises the judgment of whether the opening degree of a brake pedal is larger than 0, and if the opening degree of the brake pedal is larger than 0, the judgment of the braking working condition is carried out.
And if the brake working condition is met, judging whether the anti-towering function condition can be met, wherein the judgment of whether the anti-towering function condition can be met comprises the steps of judging whether the enable switch 4 is opened, whether the brake switch 5 is in an activated state, whether the accelerator opening is 0, whether the brake force is moderate or below and whether the vehicle speed is less than 20km/h, and if the enable switch 4 is opened, the brake switch 5 is activated, the accelerator opening is 0, moderate or below and the brake force is less than 20km/h and the vehicle speed is less than 20km/h, judging that the anti-towering function condition is met.
The braking force of the invention is divided into a severe braking force, a moderate braking force and a mild braking force, the severe braking force represents that the braking force is more than 800N, the moderate braking force represents that the braking force is not less than 400N and not more than 800N, the mild braking force represents that the braking force is less than 400N, the braking force generated by the severe braking is far more than the driving force, the problem of car shrugging does not occur, the moderate braking and the mild braking can generate the problem of car shrugging during braking, and the distinction between the moderate braking and the mild braking is used for better adjusting the cone pulley, so that the car shrugging feeling during vehicle braking is eliminated, and the driving experience of a driver is improved.
If the anti-towering function conditions can be met, the control unit 2 searches an anti-towering meter according to the braking force and the vehicle speed information output by the acquisition module 1, the anti-towering meter comprises an anti-towering rotating speed meter and an anti-towering filtering coefficient meter, the control unit obtains the calibration information of the rotating speed of the turbine of the hydraulic torque converter and the calibration value of the speed ratio filtering coefficient according to the anti-towering meter and outputs the calibration information of the rotating speed of the turbine of the hydraulic torque converter and the calibration value of the speed ratio filtering coefficient to the controller 31 of the gearbox 3, the controller 31 of the gearbox 3 reduces the rotating speed of the output shaft of the gearbox 3 by increasing the working radius of the cone pulley 32 so that the rotating speed of the turbine of the hydraulic torque converter 8 is adjusted to the calibration value of the rotating speed ratio filtering coefficient, and increases the working radius of the cone pulley so that the speed ratio filtering coefficient is adjusted to the speed ratio filtering coefficient.
The schematic table of the anti-shrugging vehicle rotating speed made by the rotating speed of the turbine of the hydraulic torque converter corresponding to the braking force and the vehicle speed is as follows:
the invention relates to a method for controlling a hydraulic torque converter 8, which comprises the steps that a control unit 2 obtains a turbine rotating speed calibration value of the hydraulic torque converter 8 according to a table look-up of braking force and vehicle speed information, namely obtains an input shaft rotating speed calibration value of a transmission 3, the control unit 2 outputs the turbine rotating speed calibration value of the hydraulic torque converter 8 to a transmission 3 controller 31, the transmission 3 controller 31 receives the turbine rotating speed calibration value of the hydraulic torque converter 8 to adjust the working radius of a conical pulley 32 of the transmission 3, the turbine rotating speed of the hydraulic torque converter 8 of a vehicle is higher than that of a gear shifting point, the turbine rotating speed of the hydraulic torque converter 8 is higher than that of an engine during braking, the turbine rotating speed of the hydraulic torque converter 8 is gradually reduced during braking, the engine rotating speed basically does not change, and the driving state of the vehicle is changed, the invention ensures that the turbine rotating speed of the hydraulic torque converter 8 of the vehicle is not higher than the engine all the vehicle speed by reducing the turbine rotating speed of the hydraulic torque converter 8, and the driving state is not changed during braking of the vehicle, thereby avoiding vehicle rising when the vehicle is braked, the driving experience of the driver is improved.
The anti-towering vehicle filter coefficient table made of the transmission speed ratio filter coefficient corresponding to the braking force is as follows:
according to the invention, the control unit 2 searches the anti-towering vehicle filter coefficient table according to the braking force information to obtain the speed ratio filter coefficient calibration value of the gearbox 3, the control unit 2 outputs the speed ratio filter coefficient calibration value to the speed changer 3 controller 31, the speed changer 3 controller 31 adjusts the working radius of the cone pulley 31 of the gearbox 3 after receiving the speed ratio filter coefficient calibration value, and the speed ratio change rate is higher.
As shown in FIG. 2, the effect of the invention before and after correction, the dotted line is the effect before correction, the solid line is the effect after correction, the engine speed during braking before correction is significantly lower than the turbine speed of the torque converter 8, the engine speed hardly changes during braking, the turbine speed of the torque converter 8 continuously decreases, when the engine speed is greater than the turbine speed of the torque converter 8, the engine speed crosses over, the vehicle driving state during braking is changed from engine drag-back to engine driving, the vehicle generates driving force, therefore, the acceleration obviously changes, thereby causing vehicle-lifting during vehicle braking, causing bad driver experience, fast speed ratio change before correction, bad vehicle braking experience, the engine speed at the shift point after correction is not much different from the turbine speed of the torque converter 8, the vehicle is in engine drag-back during braking, the vehicle does not generate driving force, and the acceleration change is not obvious, so that the vehicle cannot rise during braking, the driving experience of a driver is improved, the speed ratio change is also slowed after correction, the driver cannot feel obvious deceleration, and the driving experience of the driver is improved.
According to the invention, the preset anti-towering tachometer is checked to obtain the calibrated value of the rotating speed of the input shaft of the execution unit which is not higher than the rotating speed of the engine, and then the working radius of the cone pulley 32 of the gearbox 3 is adjusted, so that the rotating speed of the turbine of the hydraulic torque converter is not higher than the rotating speed of the engine all the time when braking and activating the anti-towering function, the vehicle is not crossed during braking, the driving state change of the vehicle and the absolute value reduction of the deceleration of the vehicle are avoided, the driving force generated by the vehicle is prevented, the towering phenomenon generated during braking of the vehicle is eliminated, and the driving experience of a driver is improved.
As shown in FIG. 3, a vehicle brake control device applying the vehicle brake control method comprises an acquisition module 1, a control unit 2, a gearbox 3, a hydraulic torque converter 8, an enable switch 4 and a brake switch 5, accelerator pedal opening sensor 6 and brake pedal opening sensor 7, acquisition module 1 includes brake pressure sensor 11 and speed sensor 12, brake pressure sensor 11, speed sensor 12, torque converter 8, enable switch 4, brake switch 5, accelerator pedal opening sensor 6 and brake pedal opening sensor 7 all are connected with the 2 input of the control unit, gearbox 3 includes controller 31 and cone pulley 32, 3 controller 31 inputs of gearbox are connected with the control unit 2, 3 cone pulley 32 inputs of gearbox are connected with 3 controller 31 outputs of gearbox, 3 cone pulley 32 outputs of gearbox are connected with torque converter 8.
The acquisition module 1 acquires pressure and speed information of a vehicle brake master cylinder in real time and outputs the pressure and speed information to the control unit 2, when a vehicle is in idle speed, the control unit 2 judges whether the vehicle is in a brake working condition or not according to signals output by the brake pedal opening sensor 7 and the hydraulic torque converter 8, when the brake pedal opening is 0 and the hydraulic torque converter 8 is opened, namely the vehicle is in the brake working condition, the control unit 2 judges whether a vehicle-shrugging eliminating function can be activated or not according to signals output by the enable switch 4, the brake switch 5, the accelerator pedal opening sensor 6, the brake pressure sensor 11 and the vehicle speed sensor 12, when the enable switch 4 is activated, the brake switch 5 is opened, the accelerator opening is 0, the braking force is within 0-800N, and the vehicle speed is less than 20km/h, namely the vehicle-shrugging eliminating function is activated, and after the braking force and speed information output by the acquisition module 1 check a vehicle-shrugging preventing rotating speed table, the control unit 2 controls the transmission 3 controller 31 to adjust the working radius of the cone pulley 32 to adjust the turbine rotating speed of the hydraulic torque converter 8 to adjust the turbine rotating speed And adjusting to a turbine speed calibration value.
Preferably, the control unit 2 of the present invention is a vehicle controller, and the vehicle controller is a core controller commonly used for vehicles at present.
According to the control unit 2, the transmission 3 is controlled by the controller 31 to adjust the working radius of the cone pulley 32 according to the vehicle braking control method, so that the turbine rotating speed of the hydraulic torque converter 8 is adjusted to the turbine rotating speed calibration value, the phenomenon of vehicle rising during vehicle braking is eliminated, and the driving experience of a driver is improved.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A vehicle brake control method, characterized by comprising the steps of:
the control unit (2) acquires braking force and vehicle speed information in real time;
the control unit (2) judges whether the vehicle is in a braking working condition, judges whether a vehicle-rise-prevention function condition is met or not when the braking working condition is met, searches a preset vehicle-rise-prevention tachometer according to the acquired braking force and vehicle speed information when the vehicle-rise-prevention function condition is met to obtain a turbine rotating speed calibration value of the hydraulic torque converter (8) which is not higher than the current engine rotating speed, outputs a rotating speed adjusting signal to the gearbox (3) controller (31) after the control unit (2) obtains the turbine rotating speed calibration value of the hydraulic torque converter (8), and controls the working radius of a conical wheel (32) of the gearbox (3) to adjust the turbine rotating speed of the hydraulic torque converter (8) to the turbine rotating speed calibration value after the gearbox (3) controller (31) receives the rotating speed adjusting signal.
2. The vehicle brake control method according to claim 1, wherein the control unit (2) searches a preset anti-towering speed ratio filter coefficient table according to the braking force information to obtain a speed ratio filter coefficient calibration value when the vehicle is in the braking condition, the control unit (2) outputs a speed ratio adjusting signal to the transmission (3) controller (31) after obtaining the speed ratio filter coefficient calibration value, and the transmission (3) controller (31) controls the working radius of a cone pulley (32) of the transmission (3) to adjust the speed ratio filter coefficient to the speed ratio filter coefficient calibration value after receiving the speed ratio adjusting signal.
3. The vehicle brake control method of claim 1, wherein the step of determining whether the vehicle is in the braking condition includes determining a magnitude of a brake pedal opening and determining that the vehicle is in the braking condition when the brake pedal opening is greater than 0.
4. The vehicle brake control method according to claim 1, wherein the satisfaction of the anti-shrugging function condition includes a determination that the degree of brake effort is moderate or less, an enable switch (4) is on, a brake switch (5) is in an activated state, an accelerator pedal opening degree is 0, and a torque converter (8) is on.
5. The vehicle brake control method according to claim 4, wherein the degree of braking includes a heavy degree of braking, a moderate degree of braking, and a light degree of braking, the heavy degree of braking includes a braking force greater than a first preset value, the moderate degree of braking includes a braking force not greater than the first preset value and not less than a second preset value, and the light degree of braking includes a braking force less than the second preset value.
6. The vehicle brake control method according to claim 4, characterized in that the torque converter (8) open condition includes a vehicle speed being lower than a preset speed.
7. The vehicle brake control device comprises a gearbox (3) and a hydraulic torque converter (8), and is characterized by further comprising an acquisition module (1) for acquiring vehicle brake force and vehicle speed information in real time and a control unit (2) for receiving the vehicle brake force and the vehicle speed information, wherein the gearbox (3) comprises a controller (31) and a cone pulley (32), the acquisition module (1) is connected with the input end of the control unit (2), the input end of the controller (31) is connected with the output end of the control unit (2), the input end of the cone pulley (32) is connected with the output end of the controller (31), the output end of the cone pulley (32) is connected with the hydraulic torque converter (8), and the control unit (2) is used for searching a preset anti-towering vehicle rotating speed table according to the brake force and the vehicle speed information output by the acquisition module (1) when the vehicle brake condition is in a brake working condition and the anti-towering vehicle function condition is met to obtain a turbine rotating speed calibration value of the hydraulic torque converter (8) which is not higher than the rotating speed of an engine And then the speed is output to a controller (31) of the gearbox (3), and the controller (31) of the gearbox (3) receives the turbine speed calibration value information of the hydraulic torque converter (8) and then adjusts the working radius of a cone pulley (32) of the gearbox (3) to adjust the turbine speed of the hydraulic torque converter (8) to the turbine speed calibration value.
8. The vehicle brake control device according to claim 7, characterized in that the acquisition module (1) comprises a brake pressure sensor (11) for outputting brake force information to the control unit (2) and a vehicle speed sensor (12) for outputting vehicle speed information to the control unit (2), and the brake pressure sensor (11) and the vehicle speed sensor (12) are connected with the input end of the control unit (2).
9. The vehicle brake control device according to claim 8, further comprising an enable switch (4), a brake switch (5), a brake pedal opening sensor (7) for outputting the magnitude of the brake pedal opening, and an accelerator pedal opening sensor (6) for outputting the magnitude of the accelerator pedal opening, wherein the enable switch (4), the brake switch (5), the brake pedal opening sensor (7), and the accelerator pedal opening sensor (6) are connected with the input end of the control unit (2).
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187463A (en) * | 2000-12-21 | 2002-07-02 | Nissan Motor Co Ltd | Acceleration and deceleration controlling device for vehicle equipped with continuously variable transmission |
| CN1699798A (en) * | 2004-05-20 | 2005-11-23 | 日产自动车株式会社 | Lock-up capacity control apparatus and method for torque converter |
| JP2007139004A (en) * | 2005-11-15 | 2007-06-07 | Toyota Motor Corp | Forward/backward travel switching mechanism |
| CN103253270A (en) * | 2013-05-10 | 2013-08-21 | 浙江吉利汽车研究院有限公司杭州分公司 | Method and device for lightening pause during shifting up |
| CN103867704A (en) * | 2012-12-12 | 2014-06-18 | 丰田自动车株式会社 | Shift control apparatus for continuously variable transmission |
| CN108496030A (en) * | 2016-02-01 | 2018-09-04 | 加特可株式会社 | The latching control device of vehicle |
| CN109162815A (en) * | 2018-09-27 | 2019-01-08 | 宁波吉利汽车研究开发有限公司 | A kind of vehicle motor control method and control system |
| CN111169456A (en) * | 2018-11-13 | 2020-05-19 | 丰田自动车株式会社 | Vehicle-mounted control device |
-
2021
- 2021-01-29 CN CN202110127071.8A patent/CN112943887B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187463A (en) * | 2000-12-21 | 2002-07-02 | Nissan Motor Co Ltd | Acceleration and deceleration controlling device for vehicle equipped with continuously variable transmission |
| CN1699798A (en) * | 2004-05-20 | 2005-11-23 | 日产自动车株式会社 | Lock-up capacity control apparatus and method for torque converter |
| JP2007139004A (en) * | 2005-11-15 | 2007-06-07 | Toyota Motor Corp | Forward/backward travel switching mechanism |
| CN103867704A (en) * | 2012-12-12 | 2014-06-18 | 丰田自动车株式会社 | Shift control apparatus for continuously variable transmission |
| CN103253270A (en) * | 2013-05-10 | 2013-08-21 | 浙江吉利汽车研究院有限公司杭州分公司 | Method and device for lightening pause during shifting up |
| CN108496030A (en) * | 2016-02-01 | 2018-09-04 | 加特可株式会社 | The latching control device of vehicle |
| CN109162815A (en) * | 2018-09-27 | 2019-01-08 | 宁波吉利汽车研究开发有限公司 | A kind of vehicle motor control method and control system |
| CN111169456A (en) * | 2018-11-13 | 2020-05-19 | 丰田自动车株式会社 | Vehicle-mounted control device |
Non-Patent Citations (1)
| Title |
|---|
| AT换挡过程实时监测与评价;黎晓然;《中国优秀硕士学位论文全文数据库（电子期刊）》;20150715;全文 * |
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