CN104325970A - Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system - Google Patents
Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system Download PDFInfo
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- CN104325970A CN104325970A CN201410442811.7A CN201410442811A CN104325970A CN 104325970 A CN104325970 A CN 104325970A CN 201410442811 A CN201410442811 A CN 201410442811A CN 104325970 A CN104325970 A CN 104325970A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001737 promoting effect Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000011217 control strategy Methods 0.000 abstract 1
- 238000011088 calibration curve Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
- B60T13/24—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 the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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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
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention relates to a brake power-assisted system based on ECU (electric control unit) auxiliary control and a control method of the brake power-assisted system. The brake power-assisted system comprises a brake power-assisted vacuum pump, an engine intake manifold and an ECU, wherein the brake power-assisted vacuum pump is connected with the engine intake manifold through a pipeline, the engine intake manifold is connected with the engine and is used for forming vacuum degree for the brake power-assisted vacuum pump, the engine intake manifold is provided with an intake manifold pressure sensor, the intake manifold pressure sensor is connected and communicated with the ECU, and is used for sending signals to the ECU, and the ECU is used for controlling the engine to control the vacuum degree of the engine intake manifold which is connected with the engine. The ECU is used as the auxiliary controller of the brake power-assisted system, so as to identify the brake action, and a control strategy algorithm is adopted to enable the vacuum degree of the manifold to meet the brake requirement. The influence on the requirement of oil consumption on low idle rotation speed is avoided, and the manifold is guaranteed to have certain vacuum degree to meet the brake requirement. The control method and the control method are innovatively developed. The brake power-assisted system has the advantages that the brake auxiliary control is realized by the ECU, the system is simple, the purpose is realized, and the cost is not increased.
Description
Technical field
The present invention relates to field of automobile electronic control, be specifically related to a kind of brake assist system and control method thereof of assisting control based on ECU.
Background technology
Along with the requirement of automobile fuel consumption is more and more lower, automotive engine idling speed is also more and more lower.But low idling speed easily causes intake manifold vacuum to reduce, thus impact brake power-assisted.Brake power-assisted is relevant to brake assist system, but because the vacuum of brake assist system is introduced come from collector pressure, therefore, in manifold, degree of vacuum has important correlation for brake power-assisted.In current actual techniques, the idle-speed control of engine management system controller ECU does not consider the auxiliary control for brake assist system.
In sum, there is following technical matters: during brake in prior art, idling collector pressure excessive (degree of vacuum is little), brake is hard.Especially summer high temperature turn on the aircondition or high altitude region more obvious.
Summary of the invention
The object of the present invention is to provide a kind of brake assist system and control method thereof of assisting control based on ECU, the auxiliary control algorithm model of brake is realized by ECU: ECU is engine electronic control unit, each car has such controller.Control policy algorithm software is integrated in ECU.Concrete technical scheme is as follows:
Assist a brake assist system for control based on ECU, comprise brake power-assisted vacuum pump, engine intake manifold, ECU (Electrical Control Unit) ECU, wherein,
Described brake power-assisted vacuum pump is by pipeline connecting engine induction maniflod;
Described engine intake manifold connecting engine degree of vacuum for setting up brake power-assisted vacuum pump;
Described engine intake manifold is provided with MAP Manifold Aabsolute Pressure Sensor, and MAP Manifold Aabsolute Pressure Sensor connecting communication is connected to ECU (Electrical Control Unit) ECU and can sends signal to it;
Described ECU (Electrical Control Unit) ECU controls, by controlling driving engine, to control the degree of vacuum of the engine intake manifold be connected with driving engine.
Further, described engine intake manifold is air-distributor pressure signal to the signal that ECU (Electrical Control Unit) ECU sends.
Further, described ECU (Electrical Control Unit) ECU controls the electronic throttle be arranged on induction maniflod, and installs fuel injector, high-tension coil etc. on the engine, carries out Injection Control, and throttle opening controls and signal feedback.
Further, described ECU (Electrical Control Unit) ECU Received signal strength is also dealt with, described signal comprises manifold pressure signal, throttle opening amount signal, clutch switch signal, BK Brake Switch signal, engine rotational speed signal and/or vehicle speed signal, described process comprises identification degree of vacuum state, and keeps manifold to set up certain degree of vacuum with satisfied brake power-assisted demand by ECU control igniting, throttle opening, engine speed.
Further, described pipeline is provided with check valve, and it can rely on difference of pressure to open.
Above-mentioned control method of assisting the brake assist system of control based on ECU, comprises the steps:
(1) ECU (Electrical Control Unit) ECU utilizes manifold pressure signal, throttle opening amount signal, clutch switch signal, BK Brake Switch signal, engine rotational speed signal, vehicle speed signal etc. to set up Controlling model;
(2) degree of vacuum state is identified;
(3) ECU (Electrical Control Unit) ECU control igniting, throttle opening, engine speed keep manifold to set up certain degree of vacuum with satisfied brake power-assisted demand.
Further, when air-distributor pressure is less than brake power-assisted vacuum pump internal pressure, connecting line check valve relies on difference of pressure to open, and manifold is bled to brake power-assisted vacuum pump and set up vacuum.
Further, when BK Brake Switch set, clutch switch set, and when the speed of a motor vehicle is greater than certain value, the auxiliary control of brake power-assisted is enable.
Further, when the speed of a motor vehicle is 0 time, jump out the auxiliary control of brake power-assisted, enable Conditional reset.
Further, when power-assisted of braking assists the enable SCC set conditionally of control, start the brake power-assisted ancillary control function carrying out promoting manifold vacuum, during this period, restriction ignition angle reduces, and idling torque coordination reduces suction quantity, thus promotes manifold vacuum, promote engine speed simultaneously and promote manifold vacuum, ignition angle reduces limit amount and promotes engine speed expected value relevant to collector pressure; When brake completes, when namely the speed of a motor vehicle is 0, brake power-assisted assignment controls enable Conditional reset, promotes manifold vacuum brake power-assisted ancillary control function and closes, get back to normal idle-speed control.
Compared with currently available technology, the present invention, using ECU as brake assist system subcontrol, identifies brake, meets brake requirement by control policy algorithm realization manifold vacuum.Neither affect the requirement that oil consumption is low to idling speed, guarantee that again the certain degree of vacuum of manifold meets the requirement of brake.Mode and control algorithm innovative development, advantage is that auxiliary control of brake is realized by ECU, and system is simple and can achieve the goal, and does not increase cost.
Accompanying drawing explanation
Fig. 1: the brake assist system constructional drawing of assisting control based on ECU
Fig. 2: brake data acquisition example
Fig. 3: certain vehicle different engine respective manifold vacuum monitor data
Fig. 4: different ignition angle respective manifold vacuum monitor data under certain vehicle idling
Fig. 5: control enable conditional policies algorithm model table 2: the gear speed of a motor vehicle that gearshift rotating speed breakpoint is corresponding
Fig. 6: promote vacuum degree control policing algorithm model
Detailed description of the invention
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
In a preferred embodiment, using ECU as brake assist system subcontrol, identify brake, meet brake requirement by control policy algorithm realization manifold vacuum.Neither affect the requirement that oil consumption is low to idling speed, guarantee that again the certain degree of vacuum of manifold meets the requirement of brake.
1, power-assisted of braking is auxiliary controls enable condition algorithm:
When BK Brake Switch set, clutch switch set, and when the speed of a motor vehicle is greater than certain value, the auxiliary control of brake power-assisted is enable.When the speed of a motor vehicle is 0 time, mean that vehicle stops, brake completes, and jump out the auxiliary control of brake power-assisted, enable Conditional reset.
2, the brake power-assisted promoting manifold vacuum assists control algorithm:
When power-assisted of braking assists the enable SCC set conditionally of control, start the brake power-assisted ancillary control function carrying out promoting manifold vacuum.During this period, restriction ignition angle reduces, and idling torque coordination reduces suction quantity, thus promotes manifold vacuum, promotes engine speed simultaneously and promotes manifold vacuum.Ignition angle reduces limit amount and promotes engine speed expected value relevant to collector pressure.When brake completes (speed of a motor vehicle is 0), brake power-assisted assignment controls enable Conditional reset, promotes manifold vacuum brake power-assisted ancillary control function and closes, get back to normal idle-speed control.
As shown in Figure 1, for assisting the brake assist system constructional drawing of control based on ECU.Brake power-assisted vacuum pump is connected to engine intake manifold by pipeline, is set up the degree of vacuum of brake power-assisted vacuum pump by manifold.When air-distributor pressure is less than brake power-assisted vacuum pump internal pressure, connecting line check valve relies on difference of pressure to open, and manifold is bled to brake power-assisted vacuum pump and set up vacuum.So the degree of vacuum of vacuum pump is directly related to intake manifold vacuum.And the degree of vacuum of manifold and the rotating speed that driving engine runs, ignition angle, suction quantity are relevant.The size of ignition angle and the number of suction quantity control by ECU.Therefore, principle of the present invention utilizes manifold pressure signal, throttle opening amount signal, clutch switch signal, BK Brake Switch signal, engine rotational speed signal, vehicle speed signal etc. to set up Controlling model exactly, identify degree of vacuum state, control igniting, throttle opening, engine speed etc. by ECU and keep manifold to set up certain degree of vacuum with satisfied brake power-assisted demand.
As shown in Figure 2, be certain vehicle brake data acquisition figure.Operating mode: 3 grades of speed of a motor vehicle 70km/h, touch on the brake, when engine speed drops into 900Rpm (speed of a motor vehicle 15km/h), steps on clutch.In figure, variable declaration is as follows:
IgaOut: ignition angle, unit CrA;
N: engine speed, unit Rpm;
Pim: collector pressure, unit hPa;
Vsp: the speed of a motor vehicle, unit km/h;
B_Brk: BK Brake Switch signal, Boolean quantity;
B_CltOn: clutch switch signal, Boolean quantity.
As can be seen from the figure, when not stepping on clutch when touching on the brake, because engine speed is from higher decline, and throttle gate is in closed condition, and collector pressure is at 200hpa, and degree of vacuum is better.But along with the reduction of rotating speed, after stepping on clutch, collector pressure improves rapidly, reaches 540hpa, and degree of vacuum reduces relatively.This is because enter idle-speed control, idling PID continues to regulate, and rotating speed is low, ignition angle is little, and manifold vacuum is deteriorated.Once run into highlands, also or high temperature turn on the aircondition high-power power load demand time, manifold vacuum can worsen more.Brake may be caused harder.Engine speed, the speed of a motor vehicle, clutch engagement signal state, brake signal state, collector pressure etc. are the modeling algorithm foundations that ECU of the present invention assists the enable condition of the brake assist system of control.
As shown in Figure 3, be respective manifold vacuum test pattern under the different engine target idling speed of certain vehicle.Ignition angle is fixed, and from idling rotating speed of target 950Rpm, at interval of 50Rpm, upwards improves target idling speed, test air-distributor pressure.As seen from Figure 3, along with the increase of target idling, manifold vacuum increases.Therefore, promoting target idling speed is that the present invention assists the method controlling brake assist system.
As shown in Figure 4, be respective manifold vacuum test pattern under the different idling ignition angle of certain vehicle.Idling 700Rpm, ignition angle is from-10CrA to 20CrA, and test collector pressure every increase 5CrA, under drawing fixing idling speed, manifold vacuum increases along with the increase of ignition angle.When drawing idling thus, improve engine speed and can promote the theoretical foundation of manifold vacuum as the invention process strategy with increase idling ignition angle.
1, the present invention is based on the brake assist system policing algorithm model that ECU assists control:
(1) the present invention is based on ECU and assist the brake assist system of control: control enable conditional policies algorithm model
Enable condition, need meet following four:
◆ BK Brake Switch set, B_Brk=True;
◆ clutch switch set, B_CltOn=True;
◆ manifold vacuum is less than threshold value;
This threshold value is scalar quantity VAL_AcumThrdL, determines according to actual brake effect.Bar pressure (Pam)-collector pressure (Pim)=manifold vacuum.But because collector pressure has and fluctuates a little, in order to avoid this fluctuation calculates the fluctuation produced to condition, algorithm introduces Hysteresis controller.The R end of controller is for demarcating variable V AL_AcumThrdR, and setting value is recommended as VAL_AcumThrdL+50 ~ 100hpa.
◆ vehicle velocity V sp is more than or equal to threshold value VAL_VspBrkThrd.
Reset condition, need meet one of following four:
◆ BK Brake Switch resets, B_Brk=False;
◆ clutch switch resets, B_CltOn=False;
◆ manifold vacuum is greater than threshold value;
◆ vehicle velocity V sp is less than reset gate limit value VAL_VspBrkThrdR (meaning vehicle close to stopping, having braked).
Variable declaration:
B_Brk: input variable, BK Brake Switch signal, types of variables: Boolean variable;
B_CltOn: input variable, clutch switch signal, types of variables: Boolean variable;
Pam: input variable, bar pressure, unit: hpa;
Pim: input variable, collector pressure, unit: hpa;
Vsp: input variable, the speed of a motor vehicle, unit: km/h;
VAL_AcumThrdR: demarcate variable, the auxiliary enable degree of vacuum higher limit of brake, unit: hpa;
VAL_AcumThrdL: demarcate variable, the auxiliary enable degree of vacuum threshold value of brake, unit: hpa;
VAL_VspBrkThrd: demarcate variable, the auxiliary enable vehicle speed threshold value of brake, unit: km/h;
VAL_VspBrkThrdR: demarcate variable, the auxiliary enable Conditional reset vehicle speed threshold value of brake, unit: km/h;
B_BrkCtrEn: output variable, the auxiliary enable condition of brake, types of variables: Boolean variable.
(2) the present invention is based on the brake assist system that ECU assists control: promote vacuum degree control policing algorithm model
When subsidiary conditions of braking meet (B_BrkCtrEn=True), idling rotating speed of target NIdcBrkCtrDsr is: higher value person between target idling speed NIdcDsr and brake assisted vacuum degree control objectives characteristic curve CUR_NIdcBrkCtrDsr_Acum.CUR_NIdcBrkCtrDsr_Acum is the curve relevant to manifold vacuum, and manifold vacuum is less, and idling rotating speed of target is higher.When subsidiary conditions of braking do not meet (B_BrkCtrEn=False), idling rotating speed of target gets back to normal idle-speed control, and expected value is target idling speed NIdcDsr;
When subsidiary conditions of braking meet (B_BrkCtrEn=True), idling target ignition angle IgaBrkCtrDsr is: higher value person between target idling ignition angle IgaDsr and brake assisted vacuum degree control objectives characteristic curve CUR_IgaBrkCtrDsr_Acum.CUR_IgaBrkCtrDsr_Acum is the curve relevant to manifold vacuum, and manifold vacuum is less, and idling target ignition angle is larger.When subsidiary conditions of braking do not meet (B_BrkCtrEn=False), idling target ignition angular convolution is to normal idle-speed control, and expected value is target idling ignition angle IgaDsr;
As can be seen here, under the intervention of target idling and ignition angle only appears at auxiliary enable condition of braking, the time is shorter.Idle-speed control quality and oil consumption can not be affected.
Variable declaration:
B_BrkCtrEn: input variable, the auxiliary enable condition of brake, types of variables: Boolean variable
NIdcDsr: input variable, target idling speed, unit: Rpm;
Acum: input variable, manifold vacuum, unit: hpa;
IgaDsr: input variable, demand ignition angle, unit: CrA;
CUR_NIdcBrkCtrDsr_Acum: calibration curve, brake auxiliary mark idling speed;
CUR_IgaBrkCtrDsr_Acum: calibration curve, brake auxiliary mark ignition angle;
NIdcBrkCtrDsr: output variable, the auxiliary idling rotating speed of target of brake, unit: Rpm;
IgaBrkCtrDsr: output variable, the auxiliary idling target ignition angle of brake, unit: CrA.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (10)
1. assist a brake assist system for control based on ECU, it is characterized in that, comprise brake power-assisted vacuum pump, engine intake manifold, ECU (Electrical Control Unit) ECU, wherein,
Described brake power-assisted vacuum pump is by pipeline connecting engine induction maniflod;
Described engine intake manifold connecting engine degree of vacuum for setting up brake power-assisted vacuum pump;
Described engine intake manifold is provided with MAP Manifold Aabsolute Pressure Sensor, and MAP Manifold Aabsolute Pressure Sensor connecting communication is connected to ECU (Electrical Control Unit) ECU and can sends signal to it;
Described ECU (Electrical Control Unit) ECU controls, by controlling driving engine, to control the degree of vacuum of the engine intake manifold be connected with driving engine.
2. brake assist system of assisting control based on ECU as claimed in claim 1, it is characterized in that, described engine intake manifold is air-distributor pressure signal to the signal that ECU (Electrical Control Unit) ECU sends.
3. brake assist system of assisting control based on ECU as claimed in claim 1 or 2, it is characterized in that, described ECU (Electrical Control Unit) ECU controls the electronic throttle be arranged on induction maniflod, and the fuel injector, high-tension coil etc. installed on the engine, carry out Injection Control, throttle opening controls and signal feedback.
4. the brake assist system of assisting control based on ECU as described in any one of claim 1-3 kind, it is characterized in that, described ECU (Electrical Control Unit) ECU Received signal strength is also dealt with, described signal comprises manifold pressure signal, throttle opening amount signal, clutch switch signal, BK Brake Switch signal, engine rotational speed signal and/or vehicle speed signal, described process comprises identification degree of vacuum state, and keeps manifold to set up certain degree of vacuum with satisfied brake power-assisted demand by ECU control igniting, throttle opening, engine speed.
5. the brake assist system of assisting control based on ECU as described in any one of claim 1-4 kind, it is characterized in that, described pipeline is provided with check valve, and it can rely on difference of pressure to open.
6. as described in claim 1-5, assist the control method of the brake assist system of control based on ECU, it is characterized in that, comprise the steps:
(1) ECU (Electrical Control Unit) ECU utilizes manifold pressure signal, throttle opening amount signal, clutch switch signal, BK Brake Switch signal, engine rotational speed signal, vehicle speed signal etc. to set up Controlling model;
(2) degree of vacuum state is identified;
(3) ECU (Electrical Control Unit) ECU control igniting, throttle opening, engine speed keep manifold to set up certain degree of vacuum with satisfied brake power-assisted demand.
7. the control method of the brake assist system of control is assisted as claimed in claim 6 based on ECU, it is characterized in that, when air-distributor pressure is less than brake power-assisted vacuum pump internal pressure, connecting line check valve relies on difference of pressure to open, and manifold is bled to brake power-assisted vacuum pump and set up vacuum.
8. assist the control method of the brake assist system of control as claimed in claims 6 or 7 based on ECU, it is characterized in that, when BK Brake Switch set, clutch switch set, and when the speed of a motor vehicle is greater than certain value, the auxiliary control of brake power-assisted is enable.
9. according to any one of claim 6-8, assist the control method of the brake assist system of control based on ECU, it is characterized in that, when the speed of a motor vehicle is 0 time, jump out the auxiliary control of brake power-assisted, enable Conditional reset.
10. according to any one of claim 6-9, the control method of the brake assist system of control is assisted based on ECU, it is characterized in that, when power-assisted of braking assists the enable SCC set conditionally of control, start the brake power-assisted ancillary control function carrying out promoting manifold vacuum, during this period, restriction ignition angle reduces, idling torque coordination reduces suction quantity, thus lifting manifold vacuum, promote engine speed simultaneously and promote manifold vacuum, ignition angle reduces limit amount and promotes engine speed expected value relevant to collector pressure; When brake completes, when namely the speed of a motor vehicle is 0, brake power-assisted assignment controls enable Conditional reset, promotes manifold vacuum brake power-assisted ancillary control function and closes, get back to normal idle-speed control.
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| CN201410442811.7A CN104325970A (en) | 2014-09-02 | 2014-09-02 | Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system |
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| CN201410442811.7A CN104325970A (en) | 2014-09-02 | 2014-09-02 | Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system |
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Cited By (5)
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| CN108622069A (en) * | 2017-03-23 | 2018-10-09 | 上海汽车集团股份有限公司 | A kind of control method for vehicle and ECU |
| CN110268150A (en) * | 2017-02-17 | 2019-09-20 | 法国大陆汽车公司 | Starting householder method and device for internal combustion engine |
| CN110979300A (en) * | 2019-12-25 | 2020-04-10 | 奇瑞汽车股份有限公司 | Method and device for adjusting brake vacuum degree and storage medium |
| CN111379639A (en) * | 2018-12-28 | 2020-07-07 | 联合汽车电子有限公司 | Method for estimating air flow in brake pump inflow manifold during braking |
| CN112550248A (en) * | 2020-12-11 | 2021-03-26 | 重庆美沣秦安汽车驱动系统有限公司 | Brake vacuum degree control method and system, storage medium and terminal |
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| CN111379639B (en) * | 2018-12-28 | 2022-07-01 | 联合汽车电子有限公司 | Method for estimating air flow in brake pump inflow manifold during braking |
| CN110979300A (en) * | 2019-12-25 | 2020-04-10 | 奇瑞汽车股份有限公司 | Method and device for adjusting brake vacuum degree and storage medium |
| CN112550248A (en) * | 2020-12-11 | 2021-03-26 | 重庆美沣秦安汽车驱动系统有限公司 | Brake vacuum degree control method and system, storage medium and terminal |
| CN112550248B (en) * | 2020-12-11 | 2022-02-11 | 重庆美沣秦安汽车驱动系统有限公司 | Brake vacuum degree control method and system, storage medium and terminal |
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Application publication date: 20150204 |