CN108545072B - Hydraulic brake boosting mechanism and boosting adjusting method thereof - Google Patents
Hydraulic brake boosting mechanism and boosting adjusting method thereof Download PDFInfo
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- CN108545072B CN108545072B CN201810562020.6A CN201810562020A CN108545072B CN 108545072 B CN108545072 B CN 108545072B CN 201810562020 A CN201810562020 A CN 201810562020A CN 108545072 B CN108545072 B CN 108545072B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
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Abstract
The invention discloses a hydraulic brake boosting mechanism and a brake boosting method, wherein the hydraulic brake boosting mechanism comprises: the brake system comprises a pedal input shaft, a power-assisted motor, a regulating motor, a hydraulic cylinder for injecting brake fluid, an input piston connected with the pedal input shaft, a power-assisted piston connected with the power-assisted input shaft of the power-assisted motor, a first regulating piston connected with the regulating input shaft of the regulating motor, a main piston, a regulating spring, a second regulating piston and a processor; the controller is in communication connection with the power-assisted motor and the adjusting motor, the power-assisted motor and the adjusting motor are controlled by the controller according to the acquired master cylinder pressure, hydraulic power-assisted cavity pressure and hydraulic adjusting cavity pressure, the power-assisted motor provides power assistance, the adjusting motor adjusts the pressure of the hydraulic adjusting cavity, and due to the existence of the adjusting spring, the pressure of the hydraulic adjusting cavity is linearly adjustable, so that the pedal stroke and the pedal force can be independently adjusted in a calibrated mode, and the adjusting precision is high and smooth.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a hydraulic brake power-assisted mechanism and a power-assisted adjusting method thereof.
Background
When the driver drives the vehicle, a large number of braking operations are involved. In order to facilitate the braking operation by the driver, the prior art alleviates the braking force applied when the driver performs the braking operation by increasing the braking assist force. The existing methods related to brake boosting mainly comprise:
1. the vacuum booster provides braking assistance by utilizing the air pressure difference between the atmospheric pressure and the vacuum pumped by the engine or the vacuum pump.
2. The electric brake booster directly performs brake boosting by using the motor.
These brake assist systems all have a brake assist capability, but have their limitations. The vacuum booster of the engine has unadjustable boosting ratio and is not suitable for pure electric vehicles. In order to maintain the vacuum degree, the vacuum pump booster may be delayed or may consume energy for a long time. The electric brake booster can adjust the boosting ratio, but the boosting ratio cannot be smoothly adjusted because of large rigidity and small buffer.
Disclosure of Invention
In view of the above, it is necessary to provide a hydraulic brake assist mechanism and an assist force adjusting method thereof, which solve the technical problem that the assist ratio cannot be smoothly adjusted in the conventional art.
The invention provides a hydraulic brake power-assisted mechanism, comprising: the brake system comprises a pedal input shaft, a power-assisted motor, a regulating motor, a hydraulic cylinder for injecting brake fluid, an input piston connected with the pedal input shaft, a power-assisted piston connected with the power-assisted input shaft of the power-assisted motor, a first regulating piston connected with the regulating input shaft of the regulating motor, a main piston, a regulating spring, a second regulating piston and a processor;
the hydraulic cylinder is divided into a hydraulic boosting cavity and a hydraulic adjusting cavity by the main piston, a first boosting piston hole and a second boosting piston hole are formed in the cylinder wall of the hydraulic boosting cavity by the hydraulic cylinder, the input piston is arranged in the first boosting piston hole, the boosting piston is arranged in the second boosting piston hole, a first adjusting piston hole and a second adjusting piston hole are formed in the cylinder wall of the hydraulic adjusting cavity by the hydraulic cylinder, the first adjusting piston is arranged in the first adjusting piston hole, and the second adjusting piston is arranged in the second adjusting piston hole;
an output shaft used for being connected with a power-assisted main cylinder is arranged on one side, close to the hydraulic adjusting cavity, of the main piston, one end of the adjusting spring is connected with the second adjusting piston, and the other end of the adjusting spring is connected with the main cylinder shell;
the processor is in communication connection with the power-assisted motor and the adjusting motor, and controls the power-assisted motor and the adjusting motor according to the acquired master cylinder pressure, hydraulic power-assisted cavity pressure and hydraulic adjusting cavity pressure.
Further, the pedal input shaft comprises an input main shaft connected with the input piston and a power-assisted shaft with a gap between the power-assisted piston, and the input main shaft is fixedly connected with the power-assisted shaft.
Further, the hydraulic kettle is communicated with the hydraulic cylinder.
Furthermore, the liquid pot is communicated with the hydraulic cylinder through a one-way valve.
Still further, the check valve is provided with a preset pretightening force.
Furthermore, the adjusting input shaft of the adjusting motor is provided with a self-locking mechanism.
Furthermore, the first adjusting piston hole is provided with a limiting block for limiting the moving distance of the first adjusting piston.
The present invention provides a brake boosting method of a hydraulic brake boosting mechanism as described above, the processor of the hydraulic brake boosting mechanism executing:
acquiring a braking request of a whole vehicle, and determining a target pressure of a main cylinder;
driving a power-assisted motor to enable the pressure of a main cylinder to reach a target pressure;
acquiring an adjustment setting, and determining a target adjustment force according to the adjustment setting;
while maintaining the pressure of the master cylinder at the target pressure, the adjustment motor is driven so that the pressure of the hydraulic adjustment chamber reaches the target adjustment force.
Further:
the method for acquiring the braking request of the whole vehicle and determining the target assistance of the hydraulic assistance cavity specifically comprises the following steps: obtaining a pedal travel signal and a vehicle braking demand, and determining a target pressure of a master cylinder according to the pedal travel signal and the vehicle braking demand;
the obtaining an adjustment setting, determining a target adjustment force according to the adjustment setting, specifically includes:
and acquiring an adjustment setting, and determining a target adjustment force corresponding to the pedal stroke signal according to the adjustment setting.
Further, the method also comprises the following steps:
and acquiring an assistance setting, and controlling the stroke of the assistance motor according to the assistance setting.
Further, the method also comprises the following steps:
and when the failure of the power assisting motor is detected, driving an adjusting motor to pull up the first adjusting piston.
The invention provides assistance by the assistance motor, adjusts the pressure of the hydraulic adjusting cavity by the adjusting motor, and enables the pressure of the hydraulic adjusting cavity to be linearly adjustable due to the existence of the adjusting spring, so that the pedal stroke and the pedal force can be independently adjusted in a calibration mode, and the adjusting precision is high and smooth.
Drawings
FIG. 1 is a schematic structural view of a hydraulic brake assist mechanism according to the present invention;
FIG. 2 is a flowchart illustrating a brake boosting method of a hydraulic brake boosting mechanism according to the present invention;
FIG. 3 is a logic diagram of a brake boosting method of a hydraulic brake boosting mechanism according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Fig. 1 is a schematic structural view of a hydraulic brake assist mechanism according to the present invention, which includes: a pedal input shaft 7, a booster motor M1, an adjusting motor M2, a hydraulic cylinder 11 for injecting brake fluid, an input piston S1 connected to the pedal input shaft 7, a booster piston S2 connected to a booster input shaft 8 of the booster motor M1, a first adjusting piston S4 connected to an adjusting input shaft 9 of the adjusting motor M2, a main piston S3, an adjusting spring 2, a second adjusting piston S5, and a processor (not shown in the figure);
the master piston S3 divides the hydraulic cylinder 11 into a hydraulic booster chamber C1 and a hydraulic adjustment chamber C2, the hydraulic cylinder 11 is provided with a first booster piston hole and a second booster piston hole in the cylinder wall of the hydraulic booster chamber C1, the input piston S1 is provided in the first booster piston hole, the booster piston S2 is provided in the second booster piston hole, the hydraulic cylinder 11 is provided with a first adjustment piston hole and a second adjustment piston hole in the cylinder wall of the hydraulic adjustment chamber C2, the first adjustment piston S4 is provided in the first adjustment piston hole, and the second adjustment piston S5 is provided in the second adjustment piston hole;
an output shaft 12 for connecting with a power-assisted master cylinder 13 is arranged on one side of the master piston S3 close to the hydraulic adjusting cavity C2, one end of the adjusting spring 2 is connected with the second adjusting piston S5, and the other end of the adjusting spring is connected with a shell of the master cylinder 13;
the processor is in communication connection with the power-assisted motor M1 and the adjusting motor M2, and controls the power-assisted motor M1 and the adjusting motor M2 according to the acquired master cylinder pressure, hydraulic power-assisted cavity pressure and hydraulic adjusting cavity pressure.
Specifically, the pedal input shaft 7 is connected to the pedal 1, when the driver steps on the pedal 1, the pedal input shaft 7 pushes the input piston S1, and according to the current situation of the vehicle, the boosting motor M1 pushes the boosting piston S2 under the drive of the processor, the push of the input piston S1 and the input piston S2 causes the hydraulic boosting chamber C1 to generate pressure to push the main piston S3 to advance, and at the same time, the processor drives the adjusting motor M2 to adjust the position of the first adjusting piston S4 based on the pressure of the hydraulic adjusting chamber C2, due to the sealing property of the hydraulic adjusting chamber C2, under the condition that the liquid amount of the hydraulic adjusting chamber C2 is fixed, the position of the second adjusting piston S5 can be regulated by the liquid flow rate, and further the compression amount or the extension amount of the adjusting spring 2 is controlled, so that the hydraulic pressure of the hydraulic adjusting chamber C2 is adjusted, further the differential pressure of the hydraulic boosting chamber C1 and the hydraulic adjusting chamber C2 is adjusted, and the master cylinder of the, the Master Cylinder 13 is preferably a Tandem Master Cylinder (TMC). Therefore, the pressure generated by the pressure in the hydraulic boost chamber C1 is equal to the pressure generated by the pressure in the hydraulic regulation chamber C2 + the reaction force of the master cylinder 13. Therefore, at a certain pedal stroke, the spring compression amount can be adjusted through the adjusting motor M2 to generate the pressure of the hydraulic power assisting cavity C1 with different sizes, so that the pedal force and the power assisting force can be adjusted. Due to the existence of the adjusting spring 2, the pressure of the hydraulic adjusting cavity C2 is linearly adjustable, and the adjusting precision is high and smooth. Therefore, the pedal force and the boosting ratio are linearly adjustable, and the adjustment precision is high and smooth.
The invention provides assistance by the assistance motor, adjusts the pressure of the hydraulic adjusting cavity by the adjusting motor, and enables the pressure of the hydraulic adjusting cavity to be linearly adjustable due to the existence of the adjusting spring, so that the pedal stroke and the pedal force can be independently adjusted in a calibration mode, and the adjusting precision is high and smooth.
In one embodiment, the pedal input shaft 7 includes an input main shaft 71 connected to the input piston S1, and a boosting shaft 72 having a gap with the boosting piston S2, and the input main shaft 71 is fixedly connected to the boosting shaft 72.
Specifically, the assisting shaft 72 of the pedal input shaft 7 and the assisting piston S2 of the present embodiment do not directly contact with each other, and only when the pushing stroke of the input main shaft 71 is larger than the pushing stroke of the assisting piston S2 and exceeds a certain range, the input main shaft 71 and the input piston S1 are fixedly connected, the input piston S1 and the assisting piston S2 are respectively matched with different piston holes on the same side of the hydraulic chamber housing and can move relatively in the axial direction of the hydraulic chamber, so that the assisting motor M1 can directly push the assisting piston S2 through the assisting input shaft 8, and by calculating the liquid amount pushed by the assisting piston S2 and the input piston S1 per unit time and the sectional areas of the input piston S1, the assisting piston S2 and the master piston S3, the relative displacement of the input piston S1 and the master piston S3 per unit time can be calculated, so that the relative speed of the master piston S3 and the input piston S1 can be adjusted, and the master piston S3 is directly connected, that is, the range of movement of the master piston S3 is fixed so that the stroke of the input piston S1 is variable, in this way, the pedal stroke is variable.
Meanwhile, when the adjusting motor M2 fails alone, the assisting motor M1 assists normally to meet the normal braking force requirement, but the pedal force and the assisting ratio cannot be adjusted. When the boosting motor M1 fails independently, a driver can directly push the boosting piston S2 and the input piston S1 to advance together through the pedal input shaft 7, so that the main piston S3 moves, the main cylinder 13 builds pressure, and the adjusting motor M2 can properly extend the adjusting spring 2 to provide lower boosting. When the boosting motor M1 and the adjusting motor M2 fail simultaneously, the driver can directly push the boosting piston S2 and the input piston S1 to advance together through the pedal input shaft 7, so that the main piston S3 moves, and meanwhile, the minimum braking requirement of the regulation needs to be guaranteed.
In the pedal releasing process, the pedal 1 drives the input piston S1 to return under the action of the return spring 6, and meanwhile, the boosting motor M1 drives the boosting piston S2 to return along with the input piston S1. Preferably, the boosting motor M1 is a non-self-locking motor, so that when the pedal is released in the failure mode, the boosting motor M1 is non-self-locking and can be pushed back under the high pressure of the hydraulic boosting cavity C1.
The structure of the embodiment can realize the following functions:
firstly, when the strokes of the input shafts are the same, the stroke of the power-assisted input shaft 8 of the power-assisted motor M1 is variable, so that the limit stroke of the pedal is adjusted;
when the automobile is driven automatically, the boosting motor M1 can independently push the boosting piston S2 to brake, and the input piston S1 is still, so that the phenomenon that the brake pedal acts autonomously to clamp feet can be avoided;
when the power-assisted motor M1 and the adjusting motor M2 fail, a driver can directly push the input piston S1 and the power-assisted piston S2 to advance together, and the lowest braking performance requirement of a legal failure mode is guaranteed;
and fourthly, under the working condition of braking energy recovery, the position of the main piston S3 can be kept by adjusting the power-assisted piston S2, and the master cylinder 13 is further prevented from being pressurized.
In one embodiment, the hydraulic kettle 4 is communicated with the hydraulic cylinder.
In this embodiment, the brake fluid is replenished to the hydraulic cylinder through the fluid pot 4.
In one embodiment, the pitcher 4 is in communication with the hydraulic cylinder through a one-way valve 10.
In the embodiment, the check valve 10 is used for controlling the hydraulic pot 4 to supplement brake fluid to the hydraulic cylinder, so that the brake fluid is prevented from entering the hydraulic pot 4 from the hydraulic cylinder.
In one embodiment, the check valve 10 is provided with a predetermined preload.
The check valve 10 at the position of the liquid pot 4 has a certain pretightening force, and the brake liquid is conducted in one direction only when the pressure difference between the two sides reaches a certain degree, so that the liquid pot 4 only supplements the brake liquid to the hydraulic cylinder when the brake liquid leaks.
In one embodiment, the adjustment input shaft 9 of the adjustment motor M2 is provided with a self-locking mechanism.
In this embodiment, the adjusting input shaft 9 of the adjusting motor M2 preferably has a self-locking characteristic on the transmission mechanism, so that the pressure in the hydraulic adjusting cavity C2 can be kept stable under the condition of power failure or other failures, and the accidental liquid supplement to the hydraulic adjusting cavity C2 caused by too low pressure is avoided. Meanwhile, if the first adjusting piston S4 is not needed to be used in the normal working process, the adjusting motor M2 can be in a standby state, and the power consumption and the requirements on the motor are reduced.
In one embodiment, the first adjusting piston hole is provided with a limiting block 3 for limiting the moving distance of the first adjusting piston S4.
This embodiment increases stopper 3, further avoids because of the pressure is low excessively to lead to the unexpected outside hydraulic pressure to adjust chamber C2 and mend liquid.
The effect of the invention is that,
(1) the liquid is used as a pressure transmission medium, so that the buffer property is better, and the controllability is high.
(2) The pedal stroke adjustment and the assistance ratio (pedal force) adjustment are decoupled, so that new brake feeling and real-time stepless brake feeling adjustment can be realized.
(3) The adjusting cavity can accurately adjust the boosting ratio, the pedal force and the stroke in real time through negative feedback, and compensate system errors and friction, so that the requirements on system assembly and manufacturing are low within a preset calibrated allowable range. And the brake force can be compensated when the power-assisted motor fails singly, and the brake capability of the whole vehicle is not influenced when the adjusting motor fails.
(4) The brake pedal can be ensured to be braked actively under the condition that the brake pedal is not sunk.
(5) The regenerative energy recovery of the brake can be supported, namely, the main pedal cylinder is not pressurized within a specified range.
As shown in fig. 2, the processor of the hydraulic brake assist mechanism according to the present invention executes:
step S201, acquiring a braking request of the whole vehicle, and determining a target pressure of a master cylinder;
step S202, driving a power-assisted motor to enable the pressure of a master cylinder to reach a target pressure;
step S203, obtaining adjustment setting, and determining target adjustment force according to the adjustment setting;
step S204, the pressure of the main cylinder is maintained at the target pressure, and meanwhile, the adjusting motor is driven, so that the pressure of the hydraulic adjusting cavity reaches the target adjusting force.
The invention realizes the adjustment of the pedal stroke of the driver by driving the power-assisted motor, and realizes the adjustment of the pedal force of the driver by adjusting the motor.
In one embodiment:
the method for acquiring the braking request of the whole vehicle and determining the target assistance of the hydraulic assistance cavity specifically comprises the following steps: obtaining a pedal travel signal and a vehicle braking demand, and determining a target pressure of a master cylinder according to the pedal travel signal and the vehicle braking demand;
the obtaining an adjustment setting, determining a target adjustment force according to the adjustment setting, specifically includes:
and acquiring an adjustment setting, and determining a target adjustment force corresponding to the pedal stroke signal according to the adjustment setting.
Specifically, the pedal stroke can be detected by an input shaft stroke sensor provided near the pedal input shaft 7, the pressure of the hydraulic booster chamber can be detected by a pressure sensor provided in the hydraulic booster chamber, the pressure of the hydraulic regulator chamber can be detected by a pressure sensor provided in the hydraulic regulator chamber, and the pressure of the main chamber can be detected by a pressure sensor provided in the main chamber.
As a preferred embodiment of the present invention, as shown in FIG. 3:
step S301, a driver steps on a pedal, and the processor receives a pedal signal and judges the braking requirement of the driver.
Step S302, the processor judges whether other braking requirements and energy recovery working conditions exist according to the working conditions of the whole vehicle, and determines the required mechanical braking size, namely the target pressure required to be generated by the TMC tandem type master cylinder.
And S303, controlling the power-assisted motor M1 according to the target pressure of the master cylinder, so as to control the power-assisted piston S2 to move, and determining the stroke of the main piston S3 together with the input piston S1, wherein the stroke of the main piston S3 can determine the pressure of the TMC tandem master cylinder as the main piston S3 is fixedly connected with the input shaft of the TMC tandem master cylinder. When TMC tandem master cylinder pressure is transmitted to the wheel cylinder, a corresponding mechanical braking force is generated.
Step S303, the detected TMC tandem type master cylinder and the deceleration of the whole vehicle are verified, and closed-loop control is realized through the control of the power-assisted motor M1, so that the master cylinder reaches the target pressure.
And S304, while mechanical braking force is realized, adjusting the M2 motor according to a pre-calibrated pedal feeling target curve, controlling the instantaneous pressure difference between the hydraulic power assisting cavity C1 and the hydraulic adjusting cavity C2, balancing the stress through the main piston S3 so as to adjust the pressure of the hydraulic power assisting cavity C1, and performing closed-loop control on the adjusting motor M2 according to the pressure feedback of the hydraulic power assisting cavity C1 so as to realize the target pedal force under the corresponding pedal stroke.
In one embodiment, the method further comprises the following steps:
and acquiring an assistance setting, and controlling the stroke of the assistance motor according to the assistance setting.
The present embodiment can determine the stroke of the boost piston S2 according to different settings of a user, and since the total volume of the hydraulic boost chamber C1 is fixed, the stroke of the boost motor M1 is adjusted to adjust the movement stroke of the boost piston S2, thereby adjusting the stroke of the input piston S1.
In one embodiment, the method further comprises the following steps:
and when the failure of the power assisting motor is detected, driving an adjusting motor to pull up the first adjusting piston.
In the embodiment, when the power-assisted motor M1 fails, the adjusting motor M2 can actively reduce the pressure of the hydraulic adjusting cavity C2 by pulling the S4 piston, so that a certain degree of braking power assistance is provided, and the foot force demand of a driver is reduced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A hydraulic brake assist mechanism, comprising: the brake system comprises a pedal input shaft, a power-assisted motor, a regulating motor, a hydraulic cylinder for injecting brake fluid, an input piston connected with the pedal input shaft, a power-assisted piston connected with the power-assisted input shaft of the power-assisted motor, a first regulating piston connected with the regulating input shaft of the regulating motor, a main piston, a regulating spring, a second regulating piston and a processor;
the hydraulic cylinder is divided into a hydraulic boosting cavity and a hydraulic adjusting cavity by the main piston, a first boosting piston hole and a second boosting piston hole are formed in the cylinder wall of the hydraulic boosting cavity by the hydraulic cylinder, the input piston is arranged in the first boosting piston hole, the boosting piston is arranged in the second boosting piston hole, a first adjusting piston hole and a second adjusting piston hole are formed in the cylinder wall of the hydraulic adjusting cavity by the hydraulic cylinder, the first adjusting piston is arranged in the first adjusting piston hole, and the second adjusting piston is arranged in the second adjusting piston hole;
an output shaft used for being connected with a power-assisted main cylinder is arranged on one side, close to the hydraulic adjusting cavity, of the main piston, one end of the adjusting spring is connected with the second adjusting piston, and the other end of the adjusting spring is connected with the main cylinder shell;
the processor is in communication connection with the power-assisted motor and the adjusting motor, and controls the power-assisted motor and the adjusting motor according to the acquired master cylinder pressure, hydraulic power-assisted cavity pressure and hydraulic adjusting cavity pressure.
2. The hydraulic brake assist mechanism according to claim 1, wherein the pedal input shaft includes an input main shaft connected to the input piston, and an assist shaft having a gap with the assist piston, the input main shaft being fixedly connected to the assist shaft.
3. The hydraulic brake assist mechanism of claim 1, further comprising a fluid reservoir in communication with the hydraulic cylinder.
4. The hydraulic brake assist mechanism according to claim 3, wherein the fluid pot is in communication with the hydraulic cylinder through a one-way valve.
5. The hydraulic brake assist mechanism according to claim 4, wherein the check valve is provided with a preset preload.
6. The hydraulic brake assist mechanism according to claim 1, wherein the adjustment input shaft of the adjustment motor is provided with a self-locking mechanism.
7. The hydraulic brake assist mechanism according to claim 1, wherein the first adjusting piston hole is provided with a stopper that defines a moving distance of the first adjusting piston.
8. A brake boosting method of a hydraulic brake boosting mechanism according to any one of claims 1 to 7, wherein said processor of said hydraulic brake boosting mechanism executes:
acquiring a braking request of a whole vehicle, and determining a target pressure of a main cylinder;
driving a power-assisted motor to enable the pressure of a main cylinder to reach a target pressure;
acquiring an adjustment setting, and determining a target adjustment force according to the adjustment setting;
while maintaining the pressure of the master cylinder at the target pressure, the adjustment motor is driven so that the pressure of the hydraulic adjustment chamber reaches the target adjustment force.
9. The brake boosting method according to claim 8, wherein:
the method for acquiring the braking request of the whole vehicle and determining the target assistance of the hydraulic assistance cavity specifically comprises the following steps: obtaining a pedal travel signal and a vehicle braking demand, and determining a target pressure of a master cylinder according to the pedal travel signal and the vehicle braking demand;
the obtaining an adjustment setting, determining a target adjustment force according to the adjustment setting, specifically includes:
and acquiring an adjustment setting, and determining a target adjustment force corresponding to the pedal stroke signal according to the adjustment setting.
10. The brake boosting method of claim 9, further comprising:
and acquiring an assistance setting, and controlling the stroke of the assistance motor according to the assistance setting.
11. The brake boosting method of claim 8, further comprising:
and when the failure of the power assisting motor is detected, driving an adjusting motor to pull up the first adjusting piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562020.6A CN108545072B (en) | 2018-06-04 | 2018-06-04 | Hydraulic brake boosting mechanism and boosting adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562020.6A CN108545072B (en) | 2018-06-04 | 2018-06-04 | Hydraulic brake boosting mechanism and boosting adjusting method thereof |
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| CN108545072A CN108545072A (en) | 2018-09-18 |
| CN108545072B true CN108545072B (en) | 2021-01-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113085824A (en) * | 2019-12-23 | 2021-07-09 | 罗伯特·博世有限公司 | Brake system and method for detecting dual assistance of a brake booster and an auxiliary brake booster |
| CN117284252B (en) * | 2023-11-27 | 2024-02-06 | 天津所托瑞安汽车科技有限公司 | Vehicle self-adaptive braking method and device, electronic equipment and storage medium |
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|---|---|---|---|---|
| US3767274A (en) * | 1971-02-01 | 1973-10-23 | Graubremse Gmbh | Automatic load-dependent braking force regulator |
| CN103950445A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Hydraulic double-motor driving electronic hydraulic braking system |
| CN104724097A (en) * | 2015-02-03 | 2015-06-24 | 北京航空航天大学 | Dual-motor drive-by-wire pressure sequence adjusting brake system |
| CN106585602A (en) * | 2015-10-20 | 2017-04-26 | 上海汇众汽车制造有限公司 | Double-motor dynamo-electric brake power-assisted mechanism |
| CN206406908U (en) * | 2017-01-17 | 2017-08-15 | 吉林大学 | A kind of motor driving EHB for improving master cylinder |
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2018
- 2018-06-04 CN CN201810562020.6A patent/CN108545072B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3767274A (en) * | 1971-02-01 | 1973-10-23 | Graubremse Gmbh | Automatic load-dependent braking force regulator |
| CN103950445A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Hydraulic double-motor driving electronic hydraulic braking system |
| CN104724097A (en) * | 2015-02-03 | 2015-06-24 | 北京航空航天大学 | Dual-motor drive-by-wire pressure sequence adjusting brake system |
| CN106585602A (en) * | 2015-10-20 | 2017-04-26 | 上海汇众汽车制造有限公司 | Double-motor dynamo-electric brake power-assisted mechanism |
| CN206406908U (en) * | 2017-01-17 | 2017-08-15 | 吉林大学 | A kind of motor driving EHB for improving master cylinder |
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