CN1746062A - Hydraulic control device - Google Patents
Hydraulic control device Download PDFInfo
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- CN1746062A CN1746062A CN 200510082884 CN200510082884A CN1746062A CN 1746062 A CN1746062 A CN 1746062A CN 200510082884 CN200510082884 CN 200510082884 CN 200510082884 A CN200510082884 A CN 200510082884A CN 1746062 A CN1746062 A CN 1746062A
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- threshold value
- pressure
- hydraulic pressure
- working barrel
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- 239000012530 fluid Substances 0.000 claims description 12
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000035807 sensation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
A kind of vibration that can suppress to make the operating unit generation, and the hydraulic control device that can carry out efficient hydraulic control by the driving work of working barrel.Drive the mode of operation of the driving engine of oil pump, when threshold value Pmot_on that the hydraulic pressure Pacc in the pressure accumulator begins less than engine operation is fired state, and is flameout state when threshold value Pmot_off that the hydraulic pressure Pacc in the pressure accumulator stops more than or equal to engine operation.The threshold value Pmot_on that threshold value Pmot_on that engine operation begins and engine operation stop then to set successively according to the serviceability and the speed of a motor vehicle of brake pedal.
Description
Technical field
The present invention relates to a kind of hydraulic control device with the operation of hydraulic pressure service vehicle.
Background technology
Be arranged at the hydraulic control device in the vehicle, for example, can be used for operating conditions, the brake noise of supplying with brake wheel cylinder is carried out pressure control, make it produce required braking force according to brake pedal.At this moment, in the pressure control that is undertaken by hydraulic control device, sucking from petrol storage tank and the braking wet goods power fluid of pressurization is sent into the pressure accumulator stored, allow this working fluid enter and to discharge according to the operational circumstances of brake pedal with working barrel.
The pressure that is stored in the working fluid in the pressure accumulator is monitored by pressure sensor, in case pressure is lower than certain value, promptly drive working barrel and in petrol storage tank, suck working fluid, the hydraulic pressure in the pressure accumulator is increased, can be controlled at the hydraulic pressure in the pressure accumulator all the time in certain scope like this.In addition, when trampling brake pedal fast,, also can adopt an auxiliary braking control method, promptly drive the pressure rising gradient of working barrel control brake wheel cylinder in order to produce enough braking forces because of emergency braking.As in the open disclosed prior art of communique " spy opens flat 10-257604 " of Japanese application for a patent for invention, when carrying out the control of above-mentioned auxiliary braking, in order to reduce the noise of trampling brake pedal driving working barrel and producing, after auxiliary braking control beginning sometime, if the driver does not carry out brake operating energetically, can reduce the dutycycle of the driving engine that drives working barrel, or change the drive amount of other working barrels.
No matter whether carried out above-mentioned auxiliary braking control, the brake noise of storing in the pressure accumulator mainly is when the driver tramples brake pedal, is discharged to regulating control for pressure boost.Can cause the hydraulic pressure in the pressure accumulator to reduce like this, its pressure can be reduced to usually and be lower than below the threshold value that makes working barrel work.Therefore, when the driver trampled brake pedal, the frequency of operation of working barrel uprised.During working barrel work, be connected in and produce negative pressure pulsation in the induction pipe between working barrel and the petrol storage tank, this negative pressure pulsation conducts to brake pedal from petrol storage tank by master cylinder, produces the pedal vibration.As mentioned above, the pedal vibration takes place when the driver tramples brake pedal usually, makes the driver produce unhappy sensation.
Summary of the invention
To the objective of the invention is in order solving the problems of the technologies described above, a kind of vibration that can suppress the operating unit that caused by the driving work of working barrel etc. to be provided, and can carry out the hydraulic control device of efficient hydraulic control.
Hydraulic control device of the present invention has: pressure accumulator, and it carries out acute build up of pressure to the power fluid of supplying with the hydraulic efficiency gear of working by hydraulic pressure; The working barrel device, it supplies with above-mentioned pressure accumulator power fluid; Pressure-detecting device, it measures the hydraulic pressure value in the above-mentioned pressure accumulator; The working barrel control setup, it controls above-mentioned working barrel device, so that the interior hydraulic pressure of above-mentioned pressure accumulator is in certain hydraulic pressure scope according to the relation between the hydraulic pressure value of being measured by above-mentioned pressure-detecting device and the predetermined hydraulic pressure threshold value.Above-mentioned working barrel control setup, its basis change the feature of above-mentioned hydraulic pressure threshold value by the information of the operating conditions of the obtained above-mentioned hydraulic work device of operating conditions acquisition device.
Here, " hydraulic efficiency gear " for utilizing the hydraulic pressure such as brake system etc., cooperates the device of driver's operation etc., if brake system, it can comprise pressure regulating valve, brake wheel cylinder, pipe arrangement etc., also can comprise the operating unit of braking etc." pressure-detecting device " is pressure sensor or pressure switch etc.Hydraulic pressure value when " hydraulic pressure threshold value " begins and stop for the work of working barrel device can be set several threshold values according to the mode of operation of working barrel." operating conditions " is, is example with the brake system, and whether brake pedal is trampled, tread-on quantity and trample speed etc." operating conditions acquisition device " be, be example with the brake system, is arranged at pedal stroke sensor on the brake pedal or stop lamp switch etc.
According to the above, with reference to driver's operating conditions and necessary hydraulic pressure value can be suitable setting hydraulic pressure threshold value, can carry out suitable change to the frequency of operation of working barrel.For example, trample the driver under the state of brake pedal, in can guaranteeing the hydraulic pressure value scope of safety traffic, set the frequency of operation that the hydraulic pressure threshold value suppresses working barrel, the operating barrier factor that vibration that can reduce brake pedal etc. is caused by the driving work of working barrel device, and driver's unhappy sensation.
Hydraulic control device of the present invention also can be according to the obtained information of aforesaid operations situation acquisition device, and the information that obtains of speed of a motor vehicle acquisition device, changes described hydraulic pressure threshold value.
" information that speed of a motor vehicle acquisition device is obtained " comprises the speed of a motor vehicle and acceleration/accel.The information of the actual vehicle speed etc. reentried outside on the information such as operating conditions of braking, promptly can consider required hydraulic pressure in real time, so, for example feel the vibration of brake pedal easily the driver, and do not need to suppress the frequency of operation of working barrel device under the situation of elevated pressures.On the contrary, the driver is being influenced under the less situation, can make the work of working barrel device as required with pressure boost.In addition, size owing to the influence that the driver is produced, also relevant with speed of a motor vehicle etc., so set the hydraulic pressure threshold value by comprehensive judgement, the not fast etc. of operating barrier factor that the driving work owing to the working barrel device produces and driver can be reduced, and fluid control efficiently can be carried out.
In sum, hydraulic control device of the present invention can suppress because the vibration of the operating unit that the driving work of working barrel device produces etc. according to actual state, and reduces the not fast etc. of the barrier factors of driver behavior and driver.
Description of drawings
Fig. 1 is the pie graph that comprises the hydraulic brake system of hydraulic pressure control device among first embodiment.
Fig. 2 is the diagram of circuit of electronic control unit controls oil pump among first embodiment.
Fig. 3 is the diagram of circuit of electronic control unit controls oil pump among second embodiment.
The specific embodiment
First embodiment
Fig. 1 is for comprising the pie graph of the hydraulic brake system of hydraulic control device 100 in the present embodiment.Hydraulic control device 100 has: oil pump 24; Drive the driving engine 26 of oil pump 24; Storage is by the pressure accumulator 28 of the brake noise of oil pump 24 suctions; Measure the pressure sensor 30 of the hydraulic pressure Pacc in the pressure accumulator 28; Make the electronic control unit 200 of engine operation according to the hydraulic pressure value of pressure sensor 30 mensuration.Oil pump 24 is by induction pipe 20, is connected with petrol storage tank 18 by setting on (not shown) such as vacuum booster and the master cylinder 14 that brake pedal 12 is connected.The signal of the signal of the pedal stroke sensor 40 of the situation of trampling of mensuration brake pedal etc. and the car speed sensor 50 of the mensuration speed of a motor vehicle is then obtained by electronic control unit 200.
Fig. 2 is the diagram of circuit of electronic control unit 200 control oil pumps 24 in the present embodiment.This treating process, for example, when ignition device is in fired state, according to repeating such as certain rules such as certain time intervals.At first, in step S10, the threshold value Pmot_on that hydraulic pressure Pacc in the pressure accumulator 28 and engine operation are begun compares, if the hydraulic pressure Pacc in the pressure accumulator 28 is lower than the threshold value Pmot_on (YES of step S10) that engine operation begins, driving engine 26 in running order (ON) in step S12.At this moment, oil pump 24 carries out work, increases hydraulic pressure in the pressure accumulator 28 by brake noise is sucked and spues from petrol storage tank 18.Then, in step S14, the threshold value Pmot_off that hydraulic pressure Pacc in the pressure accumulator 28 and engine operation are stopped to compare, if the threshold value Pmot_off (YES of step S14) that the hydraulic pressure Pacc in the pressure accumulator 28 stops more than or equal to engine operation, driving engine 26 is in halted state (OFF) in step S16.At this moment, oil pump 24 quits work, and the increase of the hydraulic pressure Pacc in the pressure accumulator 28 that is produced by oil pump 24 also stops thereupon.
Table 1 shows the example of the criterion when electronic control unit 200 is set the threshold value Pmot_on that driving engines start working.In the table 1, whether brake pedal 12 is trampled, be that the state of brake pedal 12 is stepped on (ON) and still do not stepped on (OFF), and the speed of a motor vehicle be less than 15km/h or more than or equal to 15km/h as criterion, according to these standards Pmot_on is set at 15MPa or 17MPa.
Table 1
| The speed of a motor vehicle | Less than 15km/h | More than or equal to 15km/h |
| Brake pedal ON | 15MPa | 17MPa |
| Brake pedal OFF | 17MPa | 17MPa |
At first, in low vehicle speed range, when the driver tramples brake pedal 12,, preferably reduce the driving frequency of oil pump 24 for the frequency that the vibration that suppresses brake pedal 12 takes place.In addition, need the situation of bigger braking braking force less in the low vehicle speed range, the hydraulic pressure Pacc in the pressure accumulator 28 is out of question no matter reduce to what degree.On the other hand, in high vehicle speed range,, be in high pressure conditions so preferably can drive the hydraulic pressure Pacc that oil pump 24 keeps in the pressure accumulator 28 as far as possible even because the driver tramples the also difficult vibration of feeling brake pedal 12 of brake pedal 12.Afterwards, brake pedal 12 is trampled, and the speed of a motor vehicle arrives when being easier to feel in the low vehicle speed range of pedal vibration, can reduce the driving frequency of oil pump 24.In addition, brake pedal 12 is under the situation of not trampled, owing to seldom allow the brake noises in the pressure accumulator 28 discharge, so the hydraulic pressure Pacc in the pressure accumulator 28 are easy to keep high pressure, compare very little originally when the driving frequency of oil pump 24 is trampled with brake pedal 12.In view of above some, brake pedal 12 trampled and the situation of the speed of a motor vehicle less than 15km/h under, the threshold value Pmot_on that engine operation begins is set to smaller value 15MPa, under other the situation, is set to higher value 17MPa.
Set the threshold value Pmot_on that engine operation begins as described above, can be difficult for becoming under the situation of problem, drive to keep high pressure by oil pump 24 in the pedal vibration.Therefore become easily under the situation of problem in the pedal vibration, can suppress the driving frequency of oil pump 24, so, in whole driving engineering, can realize that the driver is difficult for the fluid control of feeling that pedal vibrates.
Table 2 shows the example of the criterion when electronic control unit 200 is set the threshold value Pmot_off that engine operation stop.In the table 2, state when trampling brake pedal 12, be that the state of brake pedal 12 is never stepped on (OFF) and switched to the state of being stepped on (ON), during the state of brake pedal 12 in addition, and the speed of a motor vehicle be less than 15km/h or more than or equal to 15km/h as criterion, according to these standards Pmot_off is set at 17MPa or 19MPa.
Table 2
| The speed of a motor vehicle | Less than 15km/h | More than or equal to 15km/h |
| Brake pedal OFF is to ON | 17MPa | 19MPa |
| Other states of brake pedal | 19MPa | 19MPa |
At first, in the driver is difficult for feeling the high vehicle speed range of pedal vibration,, before the hydraulic pressure Pacc arrival 19MPa pressure accumulator 28 in, can continue to drive oil pump 24 no matter whether brake pedal 12 is trampled.On the other hand, in the driver feels the low vehicle speed range of pedal vibration easily, when brake pedal 12 is trampled, if the hydraulic pressure Pacc in the pressure accumulator 28, also will stop it even oil pump is in driving condition before this more than or equal to 17MPa.Under other brake operating situation, particularly when low vehicle speed range inside brake pedal 12 is trampled state, promptly when the driver feels the state of pedal vibration easily, the threshold value Pmot_off that engine operation stops, the threshold value Pmot_off that stops with engine operation in the high vehicle speed range is similarly 19MPa.But as shown in table 1, because the threshold value Pmot_on that driving engine is started working is set as than low value 15MPa, the frequency that therefore drives driving engine is also low, even establish higherly, what influence the threshold value Pmot_off that engine operation stops not to have yet.
Set the threshold value Pmot_off that engine operation stops as mentioned above, in low vehicle speed range, even oil pump 24 is trampled brake pedal 12 when being in driving condition, oil pump 24 also quits work easily, and after brake pedal 12 trampled, the pedal vibration also was difficult for taking place.In addition, as above-mentioned, when brake pedal 12 is not trampled, because the hydraulic pressure in the pressure accumulator 28 do not reduce usually, so when trampling brake pedal 12, the hydraulic pressure in the pressure accumulator 28 seldom drop to below the 17MPa, that is to say that in fact under the brake pedal 12 quilt states of trampling, oil pump need not drive.Therefore, in whole driving engineering, can realize that the driver is difficult for the fluid control of feeling that pedal vibrates.
In addition, the inhibition to above-mentioned pedal vibration mainly just can reach by the control program that changes electronic control unit 200, so all is easy to realize technically still from cost.
In the present embodiment, as shown in Table 1 and Table 2, with being stepped on and do not stepped on state as criterion of brake pedal 12, at this moment, the stop lamp switch that also can be set on the vehicle as the pedal stroke sensor 40 of brake pedal status determinator replaces.
Second embodiment
Among first embodiment, the hydraulic pressure Pacc value by pressure sensor 30 is measured in the pressure accumulator 28 monitors by 200 pairs of these values of electronic control component again, carries out the control that driving engine 26 is worked and stopped.But also the available hydraulic servo-unit is as hydraulic control device 100, carries out control to driving engine 26 by being arranged at pressure switch on the hydraulic booster.The formation of braking oil pressure system at this moment is identical with Fig. 1, omits explanation here, only illustrates a bit that promptly 30 of pressure sensors are replaced by pressure switch, and is monitored by electronic control unit 200.In general, when pressure during greater than certain value, pressure switch is in out the state of (ON), so present embodiment adopts the hydraulic booster that is provided with a plurality of pressure switches, and these pressure switches switch to out state the time need different pressure.
In addition, in the present embodiment, whether electronic control unit 200 is measured brake pedal 12 by the state of opening (ON) or pass (OFF) that is arranged at the stop lamp switch on the vehicle and is trampled.
Fig. 3 is the diagram of circuit of electronic control unit 200 control oil pumps 24 in the present embodiment.Here, pressure switch Psw_i and the engine operation that engine operation begins (ON) stops the pressure switch Psw_j of (OFF), chosen respectively from a plurality of pressure switches that are provided with by electronic control unit 200.For example, introduce three pressure switches, they are respectively, in 15Mpa switch to out state pressure switch Psw_1, switch to out the pressure switch Psw_2 of state and switch to out the pressure switch Psw_3 of state in 17Mpa in 19Mpa, therefrom choose the pressure switch Psw_j that pressure switch Psw_i and engine operation that engine operation begins (ON) stop (OFF) according to the state of brake pedal 12 and the speed of a motor vehicle.At first, in step S20, the state of the pressure switch Psw_i that electronic control unit 200 mensuration engine operation begin if the pressure switch Psw_i that engine operation begins is in the state (YES among the step S20) of OFF, just is set at the driving engine among the step S22 26 state of ON.Like this, oil pump 24 drives, and sucks brake noise and spues the hydraulic pressure in the increase pressure accumulator 28 from petrol storage tank 18.Then, in step S24, the state of the pressure switch Psw_j that electronic control unit 200 mensuration engine operation stop just is set at the OFF state with the driving engine among the step S26 26 if the pressure switch Psw_j that engine operation stops to be in the state (YES of step S24) of ON.Like this, oil pump 24 stops to drive, and the hydraulic pressure Pacc in the pressure accumulator 28 also stops to increase thereupon.
Table 3 is shown as the example of the criterion of electronic control unit 200 when choosing the pressure switch Psw_i that driving engine starts working.Here the setting of criterion is identical with first embodiment.In the table 3, the speed of a motor vehicle below the 15km/h and the state of brake pedal 12 be under the ON situation, choose Psw_1 as pressure switch Psw_i, other situations are then chosen Psw_2 as pressure switch Psw_i.Here, as above example because adopted the pressure switch that switches to out state in 15Mpa as Psw_1, and has adopted the pressure switch that switches to out state in 17Mpa as Psw_2, so can reach as first
The effect that embodiment is same.
Table 3
| The speed of a motor vehicle | Less than 15km/h | More than or equal to 15km/h |
| Brake pedal ON | Psw_1 | Psw_2 |
| Brake pedal OFF | Psw_2 | Psw_2 |
Table 4 is shown as the example of the criterion of electronic control unit 200 when choosing pressure switch Psw_j.Here the setting of criterion is identical with first embodiment.In the table 4, the speed of a motor vehicle below the 15km/h and the state of brake pedal 12 be during to moment that the ON state switches, to choose Psw_2 as pressure switch Psw_j from the OFF state, other occasions are then chosen Psw_3 as pressure switch Psw_j.Here, pressure switch Psw_2, identical with table 1, adopted the pressure switch of the state that switches to out in 17Mpa, and pressure switch Psw_3, then adopted the pressure switch of the state that switches to out in 19Mpa, so can reach the effect same as first embodiment.
Table 4
| The speed of a motor vehicle | Less than 15km/h | More than or equal to 15km/h |
| Brake pedal OFF is to ON | Psw_2 | Psw_3 |
| Other states of brake pedal | Psw_3 | Psw_3 |
Therefore,, also can easily according to circumstances control the driving of oil pump 24, driver behavior barrier factors that minimizing produces owing to pedal vibrates and driver's unhappy sensation etc. even for the braking oil pressure system that has adopted hydraulic booster.
So far, in conjunction with the embodiments the present invention has been carried out at length setting forth.Each inscape in the foregoing description also can adopt other forms to replace, but still belong to scope involved in the present invention.
Claims (5)
1. hydraulic control device, it has,
Pressure accumulator, it is used for the power fluid of supplying with hydraulic efficiency gear is carried out pressure accumulation, and this hydraulic efficiency gear is by hydraulic;
The working barrel device, it supplies with the described power fluid of described pressure accumulator;
Pressure-detecting device, it measures the hydraulic pressure value in the described pressure accumulator;
The working barrel control setup, its controls the work of described working barrel device, so that the interior hydraulic pressure of described pressure accumulator is in the hydraulic pressure scope of setting according to the relation between the hydraulic pressure value of being measured by described pressure-detecting device and the predetermined hydraulic pressure threshold value;
Wherein,
Described working barrel control setup according to the information of the obtained described hydraulic efficiency gear operating conditions of operating conditions acquisition device, changes described hydraulic pressure threshold value.
2. hydraulic control device according to claim 1, wherein,
Described hydraulic efficiency gear is a hydraulic brake system;
Described operating conditions acquisition device is a brake operating situation acquisition device;
Described working barrel control setup according to the obtained information of described brake operating situation acquisition device, changes described hydraulic pressure threshold value.
3. hydraulic control device according to claim 2, wherein,
Described working barrel control setup according to the obtained information of described brake operating situation acquisition device, and in order to obtain the obtained information of speed of a motor vehicle acquisition device of car speed, changes described hydraulic pressure threshold value.
4. hydraulic control device according to claim 3, wherein,
Described working barrel control setup, described hydraulic brake system be mode of operation and described car speed under the situation below the predetermined value, change the hydraulic pressure threshold value that described working barrel work begins, so that this hydraulic pressure threshold value is lower than the hydraulic pressure threshold value under other situations.
5. according to claim 3 or 4 described hydraulic control devices, wherein,
Described working barrel control setup, when described hydraulic brake system is started working, and described car speed changes the hydraulic pressure threshold value that described working barrel work stops under the situation below the predetermined value, so that this hydraulic pressure threshold value is lower than the hydraulic pressure threshold value under other situations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004261662A JP4507772B2 (en) | 2004-09-08 | 2004-09-08 | Hydraulic control device |
| JP261662/2004 | 2004-09-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746062A true CN1746062A (en) | 2006-03-15 |
| CN100364826C CN100364826C (en) | 2008-01-30 |
Family
ID=36156233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100828840A Active CN100364826C (en) | 2004-09-08 | 2005-07-11 | Hydraulic control device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4507772B2 (en) |
| CN (1) | CN100364826C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442298A (en) * | 2010-10-11 | 2012-05-09 | 通用汽车环球科技运作有限责任公司 | System and method for controlling an automatic engine stop-start based on transmission conditions |
| CN101541612B (en) * | 2007-04-20 | 2012-08-29 | 丰田自动车株式会社 | Driving control device for hybrid car |
| CN111032460A (en) * | 2017-08-31 | 2020-04-17 | 克诺尔轨道车辆系统有限公司 | Brake actuator for a rail vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6111863B2 (en) * | 2013-05-24 | 2017-04-12 | 株式会社アドヴィックス | Braking device for vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2677377B2 (en) * | 1987-08-30 | 1997-11-17 | 株式会社デンソー | Pressure control device for accumulator for braking device |
| JP2885903B2 (en) * | 1990-08-03 | 1999-04-26 | 本田技研工業株式会社 | Fluid pressure supply device for vehicles |
| JP3305612B2 (en) * | 1997-03-11 | 2002-07-24 | 本田技研工業株式会社 | Electric vehicle control device |
| JPH11165620A (en) * | 1997-12-01 | 1999-06-22 | Sumitomo Electric Ind Ltd | Brake device for vehicle |
| DE19807368A1 (en) * | 1998-02-21 | 1999-08-26 | Bosch Gmbh Robert | Method and device for controlling a brake system |
| WO2003031244A1 (en) * | 2001-10-05 | 2003-04-17 | Robert Bosch Gmbh | Pump control system in an electrohydraulic braking system |
-
2004
- 2004-09-08 JP JP2004261662A patent/JP4507772B2/en not_active Expired - Fee Related
-
2005
- 2005-07-11 CN CNB2005100828840A patent/CN100364826C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101541612B (en) * | 2007-04-20 | 2012-08-29 | 丰田自动车株式会社 | Driving control device for hybrid car |
| CN102442298A (en) * | 2010-10-11 | 2012-05-09 | 通用汽车环球科技运作有限责任公司 | System and method for controlling an automatic engine stop-start based on transmission conditions |
| CN102442298B (en) * | 2010-10-11 | 2015-02-04 | 通用汽车环球科技运作有限责任公司 | System and method for controlling an automatic engine stop-start based on transmission conditions |
| CN111032460A (en) * | 2017-08-31 | 2020-04-17 | 克诺尔轨道车辆系统有限公司 | Brake actuator for a rail vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006076409A (en) | 2006-03-23 |
| JP4507772B2 (en) | 2010-07-21 |
| CN100364826C (en) | 2008-01-30 |
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