CN102826088B - Hill-start assist device and hill-start assist method - Google Patents
Hill-start assist device and hill-start assist method Download PDFInfo
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- CN102826088B CN102826088B CN201210336163.8A CN201210336163A CN102826088B CN 102826088 B CN102826088 B CN 102826088B CN 201210336163 A CN201210336163 A CN 201210336163A CN 102826088 B CN102826088 B CN 102826088B
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Abstract
A kind of hill-start assist device, comprises Slope Transducer, braking holding device, clutch holding device and electronic control unit; Described Slope Transducer, braking holding device and clutch holding device are connected with described electronic control unit separately; Described Slope Transducer is measured the ramp gradient and is judged uphill/downhill direction, and gives described electronic control unit by signal transmission; Described electronic control unit controls unlatching or the closedown of braking holding device and clutch holding device, the braking force of vehicle is kept when described braking holding device is opened, described clutch holding device makes power-transfer clutch keep released state when opening, the braking force of freeing vehicle when described braking holding device is closed, removes when described clutch holding device is closed and to pining down of power-transfer clutch, power-transfer clutch is combined; Described electronic control unit calculates the vehicle moment downward along ramp according to the ramp gradient, and compares with the Driving Torque of driving engine.The present invention also provides a kind of hill-start assist method.
Description
Technical field
The present invention relates to wagon control, particularly a kind of hill-start assist device and hill-start assist method.
Background technology
Vehicle is opened in the process of traveling after parking on ramp again, likely occurs the phenomenon of vehicle anti-slide, stopping working or touching with rear car generation wiping, bringing many puzzlements to chaufeur as controlled the bad vehicle that also can make.
The hill-start assist method of general driver is all the braking that first pulls the hand brake, then step on power-transfer clutch and hang up 1 gear, left foot slowly lifts power-transfer clutch, feel that the obvious and vehicle of engine sound change is with Das Gaspedal of being stepped on by right crus of diaphragm after jitter phenomenon, put down parking brake this time and simultaneously left foot lets the clutch be slipped, right crus of diaphragm is stepped on the throttle, and so just can start to walk smoothly.But this Measures compare is complicated, and energy is absorbed in need driver to remain, and repeat to draw, labour intensity that the action of stopping of letting go too increases driver, make driver easily tired.
Current vehicle generally does not all prevent from slipping by slope device, in the process started to walk again after parking on ramp, because need the cooperation relation taken into account between clutch pedal, Das Gaspedal and parking brake simultaneously, especially can not expertly manipulate concerning new hand, likely there is the phenomenon making vehicle anti-slide, unnecessary accident occurs.
Summary of the invention
The invention provides a kind of hill-start assist device, eliminate the frequent use of vehicle hand brake, improve the safety performance of vehicle itself and reduce the labour intensity of chaufeur.
The present invention also provides a kind of hill-start assist method, and assisting vehicle starts to walk to move ahead not slipping under the risk of car.
For reaching above-mentioned advantage, the invention provides a kind of hill-start assist device, comprising Slope Transducer, braking holding device, clutch holding device and electronic control unit; Described Slope Transducer, braking holding device and clutch holding device are connected with described electronic control unit separately; Described Slope Transducer is measured the ramp gradient and is judged uphill/downhill direction, and gives described electronic control unit by signal transmission; Described electronic control unit controls unlatching or the closedown of braking holding device and clutch holding device, the braking force of vehicle is kept when described braking holding device is opened, described clutch holding device makes power-transfer clutch keep released state when opening, the braking force of freeing vehicle when described braking holding device is closed, removes when described clutch holding device is closed and to pining down of power-transfer clutch, power-transfer clutch is combined; Described electronic control unit calculates the vehicle moment downward along ramp according to the ramp gradient, and compares with the Driving Torque of driving engine.
In one embodiment of this invention, described hill-start assist device also comprises car speed sensor, and described car speed sensor is connected with described electronic control unit, for collection vehicle vehicle speed signal and vehicle speed signal is passed to described electronic control unit.
In one embodiment of this invention, described hill-start assist device also comprises braking sensor, brake pedal and the described electronic control unit of described braking sensor and vehicle are connected, for collection vehicle speed-slackening signal and speed-slackening signal is passed to described electronic control unit.
In one embodiment of this invention, described hill-start assist device also comprises clutch sensor, clutch pedal and the described electronic control unit of described clutch sensor and vehicle are connected, for collection vehicle clutch signal and give described electronic control unit by clutch signal transmission.
In one embodiment of this invention, described braking holding device comprises the pressure retaining valve be arranged on brake piping and the brake cylinder braked wheel, and the pressure that described pressure retaining valve keeps the pressure of brake cylinder to make vehicle be in braking mode or removal brake cylinder makes car brakeing status releasing.
In one embodiment of this invention, described pressure retaining valve is solenoid directional control valve, controls it and obtains electric or dead electricity and replace, and then control the action of brake cylinder by described electronic control unit.
In one embodiment of this invention, described clutch holding device comprises the pressure retaining valve be arranged in clutch pipeline and the clutch cylinder be connected with power-transfer clutch, and the pressure that described pressure retaining valve keeps the pressure of clutch cylinder to make power-transfer clutch be in released state or removal clutch cylinder makes power-transfer clutch be in compression bonding state.
In one embodiment of this invention, described pressure retaining valve is solenoid directional control valve, controls it and obtains electric or dead electricity and replace, and then control the action of clutch cylinder by described electronic control unit.
The present invention also provides a kind of hill-start assist method, comprises the steps:
Detect the speed of a motor vehicle by car speed sensor, and measure the ramp gradient by Slope Transducer and judge uphill/downhill direction;
The signal transmitted by electronic control unit reception Slope Transducer and car speed sensor;
When electronic control unit judges that vehicle has stopped and being in upward slope, exporting control signal by electronic control unit makes braking holding device and clutch holding device open, described braking holding device keeps braking force to vehicle, and described clutch holding device keeps power-transfer clutch to be in released state;
Calculate the vehicle moment downward along ramp by electronic control unit according to the ramp gradient, and compare with the Driving Torque of driving engine; And
When starting to walk, when electronic control unit judges that the Driving Torque of vehicle is enough to overcome the vehicle moment downward along slope, electronic control unit exports control signal makes braking holding device and clutch holding device unclamp, described braking holding device removes the braking to vehicle, described clutch holding device is removed and is made power-transfer clutch compress combination to pining down of power-transfer clutch, and vehicle start is moved ahead.
In one embodiment of this invention, described braking holding device comprises the pressure retaining valve be arranged on brake piping and the brake cylinder braked wheel, and the pressure that described pressure retaining valve keeps the pressure of brake cylinder to make vehicle be in braking mode or removal brake cylinder makes car brakeing status releasing.
In one embodiment of this invention, described clutch holding device comprises the pressure retaining valve be arranged in clutch pipeline and the clutch cylinder be connected with power-transfer clutch, and the pressure that described pressure retaining valve keeps the pressure of clutch cylinder to make power-transfer clutch be in released state or removal clutch cylinder makes power-transfer clutch be in compression bonding state.
In one embodiment of this invention, described method also comprise by electronic control unit vehicle driving up stop after at once send prompting, prompting chaufeur step on clutch pedal.
Compared with prior art, the hill-start assist device that the present invention proposes and hill-start assist method utilize Slope Transducer to measure the ramp gradient and to judge uphill/downhill direction, braking holding device is utilized to keep braking force, make vehicle still can not slip car at loosen the brake, do not need to pull the hand brake, eliminate the frequent use of vehicle hand brake, power-transfer clutch is made to be in released state in conjunction with utilizing clutch holding device, when judging that torque that driving engine exports is enough to the balancing vehicle complete vehicle quality moment downward along ramp by electronic control unit during starting, braking holding device unclamps brake off automatically, clutch holding device automatically unclamps and makes power-transfer clutch progress into bonding state, vehicle is moved ahead not slipping under car risk starting, whole starting-up process only need chaufeur trample Das Gaspedal refuel can complete, without the need to compounding practice clutch pedal and parking brake (parking brake even can save), can effectively prevent vehicle from slipping by slope in ramp, improve the safety performance of vehicle itself and reduce the labour intensity of chaufeur.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of hill-start assist device in the embodiment of the present invention.
Fig. 2 is the wherein a kind of schematic diagram braking holding device in the embodiment of the present invention.
Fig. 3 is wherein a kind of schematic diagram of clutch holding device in the embodiment of the present invention.
Fig. 4 is the diagram of circuit of hill-start assist method in the embodiment of the present invention.
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the specific embodiment of the present invention, structure, feature and effect thereof, be described in detail as follows.
Aforementioned and other technology contents, Characteristic for the present invention, can know and present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of detailed description of the invention, when can to the present invention for the technological means reaching predetermined object and take and effect be able to more deeply and concrete understanding, however institute's accompanying drawings be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
Fig. 1 is the schematic diagram of the hill-start assist device in the embodiment of the present invention, this hill-start assist device 10 comprises Slope Transducer 11, braking sensor 12, car speed sensor 13, braking holding device 14, clutch sensor 15, clutch holding device 16, select switch 17, relay indicating light 18 and electronic control unit (ElectronicControlUnit, ECU) 19.Wherein Slope Transducer 11, braking sensor 12, car speed sensor 13, braking holding device 14, clutch holding device 16, select switch 17 and relay indicating light 18 be connected with electronic control unit 19 separately, with by signal transmission to electronic control unit 19 or the control accepting electronic control unit 19; Electronic control unit 19 can be integrated in inside original vehicle-mounted computer or to separate with original vehicle-mounted computer and design.
Signal for the present inclination of measuring vehicle on ramp and vehicle uphill/downhill direction, and is exported to electronic control unit 19 by Slope Transducer 11, and Slope Transducer 11 is such as arranged on chassis, can adopt obliquity sensor or sensing gyroscope instrument etc.
Brake pedal 20 and the electronic control unit 19 of braking sensor 12 and vehicle are connected, and for the speed-slackening signal of collection vehicle, when chaufeur steps on brake pedal 20, speed-slackening signal is also passed to electronic control unit 19 by braking sensor 12.Braking sensor 12 is such as arranged on brake pedal 20 or near it, brake switch, proximity switch or displacement pickup can be adopted, because the mechanical tractional force on brake pedal 20 can also be converted to torsion, pressure etc. easily, therefore braking sensor 12 can also be the sensor of above-mentioned application force form.
Car speed sensor 13 for collection vehicle vehicle speed signal and this vehicle speed signal is passed to electronic control unit 19, car speed sensor 13 is such as arranged on wheel or in vehicle bridge, can adopt magneto-electric car speed sensor or photo-electric car speed sensor etc.
Braking holding device 14 for keeping its braking force to vehicle on the basis of having braked, even if now loosen the brake 20, because braking holding device 14 keeps car brakeing, vehicle also can not slip car.In the present embodiment, as shown in Figure 2, braking holding device 14 comprises the brake cylinder 32(oil cylinder or cylinder that are arranged on pressure retaining valve 31 on brake piping 30 and brake wheel), pressure retaining valve 31 can keep the pressure of brake cylinder 32 to make vehicle be in braking mode, also the pressure of removal brake cylinder 32 can make car brakeing status releasing; Pressure retaining valve 31 can select solenoid directional control valve, controls it and obtains electric or dead electricity and replace, to change the path of pipeline, and then control the action of brake cylinder 32 by electronic control unit 19.Fig. 2 is only wherein a kind of example of braking holding device 14, understandably, for those of ordinary skills, braking holding device 14 can adopt any device that can keep vehicle braking force, such as brake holding device 14 in other embodiments also can adopt by the mode of step motor control brake clamp, rotated forward to lock brake clamp by electronic control unit 19 control step motor, braking force is kept to vehicle; During brake off power, rotated backward by electronic control unit 19 control step motor and make the braking of brake clamp releasing to vehicle.Certainly, the form of braking holding device 14 is not limited to above citing.
Clutch pedal 21 and the electronic control unit 19 of clutch sensor 15 and vehicle are connected, for the clutch signal of collection vehicle, when chaufeur steps on clutch pedal 21, clutch sensor 15 by clutch signal transmission to electronic control unit 19, clutch sensor 15 is such as arranged on clutch pedal 21 or near it, Isolating Switch, proximity switch or displacement pickup can be adopted, because the mechanical tractional force on clutch pedal 21 can also be converted to torsion, pressure etc. easily, therefore clutch sensor 15 can also be the sensor of above-mentioned application force form.
Clutch holding device 16 for the power-transfer clutch of vehicle and divided flywheel from basis (when such as stepping on clutch pedal 21), power-transfer clutch is kept to be in released state, even if now unclamp clutch pedal 21, because power-transfer clutch is remained on released state by clutch holding device 16, power-transfer clutch also can not be combined with flywheel.In the present embodiment, as shown in Figure 3, clutch holding device 16 comprises the pressure retaining valve 41 be arranged in clutch pipeline 40 and the clutch cylinder 42(oil cylinder be connected with power-transfer clutch or cylinder), pressure retaining valve 41 can keep the pressure of clutch cylinder 42 to make power-transfer clutch be in released state, also can the pressure of removal clutch cylinder 42 gradually make power-transfer clutch be in impaction state gradually until be combined with flywheel; Pressure retaining valve 41 can select solenoid directional control valve, controls it and obtains electric or dead electricity and replace, to change the path of pipeline, and then control the action of clutch cylinder 42 by electronic control unit 19.Fig. 3 is only wherein a kind of example of clutch holding device 16, understandably, for those of ordinary skills, clutch holding device 16 can adopt any power-transfer clutch that can pin down to make it keep the device of released state, such as clutch holding device 16 also can adopt by the mode of step motor control power-transfer clutch, by stepping motor rotate forward band dynamic clutch and divided flywheel from, maintenance power-transfer clutch is in released state; During loosen the clutch, rotated backward by stepping motor and remove pining down power-transfer clutch, power-transfer clutch is unclamped and is combined to flywheel.Certainly, the form of clutch holding device 16 is not limited to above citing.
Select switch 17 is for opening the starting additional function that goes up a slope, whether chaufeur can open the auxiliary function of starting of going up a slope by unrestricted choice, when chaufeur opens select switch 17, then enable the anti-of hill-start assist device 10 and slip by slope function, when chaufeur closes select switch 17, then for not enable hill-start assist device 10.When chaufeur enables hill-start assist device 10, then relay indicating light 18 lights, and the upward slope starting additional function of hill-start assist device 10 has been enabled in prompting.
According to the signal that braking sensor 12 and car speed sensor 13 transmit, electronic control unit 19 judges whether vehicle has been braked and stopped, and the signal simultaneously transmitted according to Slope Transducer 11, judge vehicle whether on the ramp of going up a slope and the gradient is how many, if vehicle is braked and is stopped on the ramp of going up a slope, then electronic control unit 19 exports control signal to open braking holding device 14 and clutch holding device 16, braking holding device 14 pairs of vehicles keep its braking force on the basis of having braked, clutch holding device 16 power-transfer clutch and divided flywheel from basis on keep the released state of power-transfer clutch, vehicle like this parking and the car that can not slip on the slope, electronic control unit 19 calculates the vehicle moment downward along ramp according to the ramp gradient simultaneously, and compare with the Driving Torque of driving engine, to judge equilibrium of forces when starting to walk, when when starting to walk, chaufeur is trampled and is slipped under throttle makes the Driving Torque of driving engine be increased to be enough to overcome vehicle, electronic control unit 19 exports control signal to close braking holding device 14 and clutch holding device 16, braking holding device 14 unclamps with brake off power, clutch holding device 16 unclamps and makes power-transfer clutch compress gradually and be combined with flywheel, vehicle is moved ahead not slipping under car risk starting.
For calculating the vehicle moment downward along ramp, assuming that complete vehicle quality is m, this quality can be preset in electronic control unit 19, again in conjunction with the ramp angles parameter alpha that Slope Transducer 11 is measured, automatically calculating the vehicle component downward along ramp by electronic control unit 19 is Fx=mgsin α, the rolling moment that now vehicle is downward along ramp is Nx=mgsin α r, and wherein r is vehicle centroid height, and this height of center of mass can be preset in electronic control unit 19; And the Driving Torque of driving engine is Ns, as Ns > (1+k) Nx, wherein k is safety factor, such as, get 0.1 ~ 0.2, then judge can take-off the brake holding device 14 and clutch holding device 16 for electronic control unit 19, and vehicle is advanced.In order to fully reflect the difference of vehicle load-carrying at ordinary times, when taking 1 people in such as car and take 4 people, total mass has difference, can in car on each seat setting example as weight sensor or infradred sensor etc., the actual number taken in sensing car, and pass to electronic control unit 19, electronic control unit 19 draws complete vehicle quality m=m1+m2, wherein m1 is clean car weight amount, m2 is the weight of all occupants, and make result of calculation more accurate, starting controls sensitiveer and effective.
Please join Fig. 4, Fig. 4 is the diagram of circuit of hill-start assist method in the embodiment of the present invention simultaneously, introduces principle of work when going up a slope starting below in conjunction with Fig. 1 and Fig. 2:
First open select switch 17, enable the anti-of hill-start assist device 10 and slip by slope function.Whether braking sensor 12 detects has speed-slackening signal and car speed sensor 13 detects the speed of a motor vehicle, when car brakeing stops, driver steps on brake pedal 20, braking sensor 12 speed-slackening signal detected and car speed sensor 13 detects that the speed of a motor vehicle is zero, and electronic control unit 19 can receive speed-slackening signal and the speed of a motor vehicle is the signal of zero, meanwhile, Slope Transducer 11 detects the gradient in vehicle uphill/downhill direction and ramp, and whether what therefore electronic control unit 19 also can receive that Slope Transducer 11 transmits is in upward slope and the grade signal in ramp, place, when electronic control unit 19 judge vehicle be in upward slope and the gradient be greater than particular value (being such as greater than 3 °) time, electronic control unit 19 controls braking holding device 14 and clutch holding device 16 is opened, on the basis of having braked, its braking force is kept by braking holding device 14 pairs of vehicles, by clutch holding device 16 pairs of vehicles power-transfer clutch and divided flywheel from basis on keep the released state of power-transfer clutch, even if now the right crus of diaphragm of chaufeur leaves brake pedal 20, vehicle also can not slip by slope, then electronic control unit 19 calculates the vehicle moment downward along ramp according to the ramp gradient, and compares with the Driving Torque of driving engine, to judge equilibrium of forces, when starting to walk, chaufeur is shifted gears and the power refueled to improve driving engine, when trample throttle to a certain extent time, when electronic control unit 19 judges that the Driving Torque of vehicle is enough to overcome the vehicle moment downward along slope, when namely meeting Ns > (1+k) Nx, electronic control unit 19 exports control signal makes braking holding device 14 and clutch holding device 16 unclamp, braking holding device 14 removes the braking to vehicle, the holding device of clutch simultaneously 16 unclamps and removes pining down power-transfer clutch, power-transfer clutch compresses gradually and is combined with flywheel, vehicle is moved ahead not slipping under car risk starting, whole starting-up process only need chaufeur trample Das Gaspedal refuel can complete, without the need to compounding practice clutch pedal and parking brake (parking brake even can save).After completing starting, braking holding device 14 and clutch holding device 16 inoperative, until next ramp is just enabled during stopping-down.
For guarantee the power-transfer clutch of vehicle and divided flywheel from, judge that vehicle is when stopping has been braked in the ramp of going up a slope and the gradient is greater than particular value at electronic control unit 19, after car brakeing stops, at once prompting can be sent by electronic control unit 19, prompting chaufeur steps on clutch pedal 21, when chaufeur steps on clutch pedal 21, clutch sensor 15 detects the signal that clutch is separated and is passed to electronic control unit 19, electronic control unit 19 sends control signal after receiving this signal makes clutch holding device 16 open, to vehicle power-transfer clutch and divided flywheel from basis on keep the released state of power-transfer clutch.Understandably, in order to alleviate the manipulation strength of chaufeur, by power-transfer clutch and divided flywheel from operation clutch holding device 16 also can be transferred to automatically to carry out, namely judge that vehicle is when stopping has been braked in the ramp of going up a slope and the gradient is greater than particular value at electronic control unit 19, clutch holding device 16 be first about to power-transfer clutch and divided flywheel from, keep the released state of power-transfer clutch more on this basis, until unclamp again under the control of electronic control unit 19 during starting, need under this kind of situation clutch holding device 16 have by power-transfer clutch and divided flywheel from function, such as driving stepper motor can be adopted, the modes such as oil pressure actuated or air pressure driving realize by power-transfer clutch and divided flywheel from.
In sum, the present invention utilizes Slope Transducer to measure the ramp gradient and to judge uphill/downhill direction, again grade signal is input to electronic control unit, braking holding device is utilized to keep braking force, make vehicle still can not slip car at loosen the brake, do not need to pull the hand brake, eliminate the frequent use of vehicle hand brake, power-transfer clutch is made to be in released state in conjunction with utilizing clutch holding device, when during starting, electronic control unit judges that torque that driving engine exports is enough to the balancing vehicle complete vehicle quality moment downward along ramp, braking holding device unclamps brake off automatically, clutch holding device automatically unclamps and makes power-transfer clutch progress into bonding state, vehicle is advanced when not slipping by slope risk, can effectively prevent vehicle from slipping by slope in ramp, improve the safety performance of vehicle itself and reduce the labour intensity of chaufeur, cost is not high and fault and security risk are very low, most of vehicle can be fitted through the device that this conceptual design goes out.
The above, only embodiments of the invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (8)
1. a hill-start assist device (10), is characterized in that: comprise Slope Transducer (11), braking holding device (14), clutch holding device (16) and electronic control unit (19), described Slope Transducer (11), braking holding device (14) and clutch holding device (16) are connected with described electronic control unit (19) separately, described Slope Transducer (11) is measured the ramp gradient and is judged uphill/downhill direction, and gives described electronic control unit (19) by signal transmission, described electronic control unit (19) controls unlatching or the closedown of braking holding device (14) and clutch holding device (16), the braking force of vehicle is kept when described braking holding device (14) is opened, described clutch holding device (16) makes power-transfer clutch keep released state when opening, described braking holding device (14) comprises the pressure retaining valve (31) be arranged on brake piping (30) and the brake cylinder (32) braked wheel, the pressure that described pressure retaining valve (31) keeps the pressure of brake cylinder (32) to make vehicle be in braking mode or removal brake cylinder (32) makes car brakeing status releasing, described pressure retaining valve is solenoid directional control valve, control it by described electronic control unit obtain electric or dead electricity and replace, and then control the action of brake cylinder, the braking force of freeing vehicle when described braking holding device (14) is closed, removes when described clutch holding device (16) is closed and to pining down of power-transfer clutch, power-transfer clutch is combined, described electronic control unit (19) calculates the vehicle moment downward along ramp according to the ramp gradient, and compares with the Driving Torque of driving engine.
2. hill-start assist device (10) as claimed in claim 1, it is characterized in that: described hill-start assist device (10) also comprises car speed sensor (13), described car speed sensor (13) is connected with described electronic control unit (19), for collection vehicle vehicle speed signal and vehicle speed signal is passed to described electronic control unit (19).
3. hill-start assist device (10) as claimed in claim 2, it is characterized in that: described hill-start assist device (10) also comprises braking sensor (12), brake pedal (20) and the described electronic control unit (19) of described braking sensor (12) and vehicle are connected, for collection vehicle speed-slackening signal and speed-slackening signal is passed to described electronic control unit (19).
4. hill-start assist device (10) as claimed in claim 2, it is characterized in that: described hill-start assist device (10) also comprises clutch sensor (15), clutch pedal (21) and the described electronic control unit (19) of described clutch sensor (15) and vehicle are connected, for collection vehicle clutch signal and give described electronic control unit (19) by clutch signal transmission.
5. hill-start assist device (10) as claimed in claim 1, it is characterized in that: described clutch holding device (16) comprises the pressure retaining valve (41) be arranged in clutch pipeline (40) and the clutch cylinder (42) be connected with power-transfer clutch, the pressure that described pressure retaining valve (41) keeps the pressure of clutch cylinder (42) to make power-transfer clutch be in released state or removal clutch cylinder (42) makes power-transfer clutch be in compression bonding state.
6. a hill-start assist method, comprises the steps:
Detect the speed of a motor vehicle by car speed sensor (13), and measure the ramp gradient by Slope Transducer (11) and judge uphill/downhill direction;
The signal transmitted by electronic control unit (19) reception Slope Transducer (11) and car speed sensor (13);
When electronic control unit (19) judges that vehicle has stopped and being in upward slope, exporting control signal by electronic control unit (19) makes braking holding device (14) and clutch holding device (16) open, described braking holding device (14) keeps braking force to vehicle, and described clutch holding device (16) keeps power-transfer clutch to be in released state; Described braking holding device (14) comprises the pressure retaining valve (31) be arranged on brake piping (30) and the brake cylinder (32) braked wheel, the pressure that described pressure retaining valve (31) keeps the pressure of brake cylinder (32) to make vehicle be in braking mode or removal brake cylinder (32) makes car brakeing status releasing, described pressure retaining valve is solenoid directional control valve, control it by described electronic control unit to obtain electric or dead electricity and replace, and then control the action of brake cylinder;
Calculate the vehicle moment downward along ramp by electronic control unit (19) according to the ramp gradient, and compare with the Driving Torque of driving engine; And
When starting to walk, when electronic control unit (19) judges that the Driving Torque of vehicle is enough to overcome the vehicle moment downward along slope, electronic control unit (19) exports control signal makes braking holding device (14) and clutch holding device (16) unclamp, described braking holding device (14) removes the braking to vehicle, described clutch holding device (16) is removed and is made power-transfer clutch compress combination to pining down of power-transfer clutch, and vehicle start is moved ahead.
7. hill-start assist method as claimed in claim 6, it is characterized in that: described clutch holding device (16) comprises the pressure retaining valve (41) be arranged in clutch pipeline (40) and the clutch cylinder (42) be connected with power-transfer clutch, the pressure that described pressure retaining valve (41) keeps the pressure of clutch cylinder (42) to make power-transfer clutch be in released state or removal clutch cylinder (42) makes power-transfer clutch be in compression bonding state.
8. hill-start assist method as claimed in claim 6, is characterized in that: described method also comprises and after vehicle driving up stops, at once sends prompting by electronic control unit (19), and prompting chaufeur steps on clutch pedal (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210336163.8A CN102826088B (en) | 2012-09-12 | 2012-09-12 | Hill-start assist device and hill-start assist method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210336163.8A CN102826088B (en) | 2012-09-12 | 2012-09-12 | Hill-start assist device and hill-start assist method |
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| CN102826088A CN102826088A (en) | 2012-12-19 |
| CN102826088B true CN102826088B (en) | 2016-01-20 |
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| CN201210336163.8A Expired - Fee Related CN102826088B (en) | 2012-09-12 | 2012-09-12 | Hill-start assist device and hill-start assist method |
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| JP6198036B2 (en) * | 2013-02-26 | 2017-09-20 | スズキ株式会社 | Vehicle control device |
| CN103527767B (en) * | 2013-09-24 | 2016-02-03 | 浙江吉利控股集团有限公司 | Creep auxiliary control method in a kind of automatic transmission ramp |
| CN104859442A (en) * | 2014-02-26 | 2015-08-26 | 冯晓初 | A starting device for a manual transmission car using a clutch pedal for refueling |
| CN105365822A (en) * | 2014-09-02 | 2016-03-02 | 博世汽车部件(苏州)有限公司 | Hill start assisting system and method for vehicle |
| CN106314417B (en) * | 2015-06-16 | 2019-07-23 | 徐工集团工程机械股份有限公司 | A kind of starting system, automobile and method |
| CN105835862B (en) * | 2016-03-28 | 2019-01-25 | 广东戈兰玛汽车系统有限公司 | Control method, device and system for preventing vehicle from sliding down slope |
| CN106167009A (en) * | 2016-07-18 | 2016-11-30 | 北汽福田汽车股份有限公司 | Upward slope auxiliary body and there is its automobile |
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| CN113844275A (en) * | 2021-08-26 | 2021-12-28 | 江铃汽车股份有限公司 | Electronic clutch ramp anti-slip control system and method thereof |
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| CN2675457Y (en) * | 2004-02-07 | 2005-02-02 | 黄仰圣 | Semi automatic driving device for hand-operated gear shift step-speed-changing automobile |
| CN102556069B (en) * | 2012-01-16 | 2014-11-26 | 浙江吉利汽车研究院有限公司 | Car ramp start device |
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| CN101332775A (en) * | 2008-08-06 | 2008-12-31 | 山东理工大学 | Hydraulic energy storage bus brake energy regeneration system |
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