CN110293971A - The slow drop control method in ramp, the slow drop control system in ramp and vehicle - Google Patents
The slow drop control method in ramp, the slow drop control system in ramp and vehicle Download PDFInfo
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- CN110293971A CN110293971A CN201910551655.0A CN201910551655A CN110293971A CN 110293971 A CN110293971 A CN 110293971A CN 201910551655 A CN201910551655 A CN 201910551655A CN 110293971 A CN110293971 A CN 110293971A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000004913 activation Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000003831 deregulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/146—Display means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2552/00—Input parameters relating to infrastructure
- B60W2552/15—Road slope, i.e. the inclination of a road segment in the longitudinal direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/10—Longitudinal speed
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Controls For Constant Speed Travelling (AREA)
Abstract
A kind of ramp is slow to drop control method, the slow drop control system in ramp and vehicle, and this method comprises the following steps: judging whether off-road mode opens；When the off-road mode is opened, the present speed of vehicle is judged whether in scheduled speed interval, and the gradient of the slope surface where vehicle is whether in scheduled gradient section；If the present speed of vehicle is in the scheduled speed interval, and the gradient of slope surface where vehicle, in the scheduled gradient section, ramp is slow to drop control function activation, present speed traveling when control vehicle keeps the slow drop control function in the ramp to activate.The slow drop control method in the ramp is easy to operate, can accurately reflect the driving intention of driver, have preferable driving experience.
Description
Technical field
The present invention relates to vehicle automation field, the slow drop control method in especially a kind of ramp, ramp slow drop control system
System and vehicle.
Background technique
Under normal circumstances, gas pedal is unclamped when vehicle is in descending, engine can be run with lower revolving speed, the speed of vehicle
Degree will slow down (normal engine brake effect).However, if downward grades become steeper, or when vehicle load is overweight
When, in spite of the influence of engine brake, the speed of vehicle still be will increase.In such a case it is necessary to touch on the brake to reduce vehicle
Speed, if driver's misoperation, vehicle is easily out of hand and causes safety accident.
For vehicle in abrupt slope or rough sections of road, slow drop control (the HDC:Hill Descent Control) function in ramp can
Guarantee the decrease speed of vehicle and the stability of vehicle driving to use brake regulation, it is nervous with the transition for mitigating driver,
Guarantee the safety traffic of vehicle.
The slow drop control function in ramp is a subfunction of electronic stabilizing control system (ESC), it is therefore an objective under vehicle low speed
The speed and stability of vehicle are controlled when slope.The slow drop control function in ramp eliminates driver and steps on brake in abrupt slope decline condition
Vehicle pedal and gas pedal are come under the demand of stabilizing speed, and the slow drop control function in ramp uses brake regulation and self gravity component
To keep safe decrease speed.The function is increasingly being applied on various vehicles.
However, the slow drop control function in ramp generally has one and individually opens switch and speed regulating device, beating
After opening switch, the slow drop control function in ramp can just be activated.In addition, in adjustment speed, need to adjust by speed by
Button, speed of the de-regulation vehicle after the slow drop control function system interference in ramp, the feature operation is relatively complicated, and can not and
When reflect that the driving intention of driver, driving experience are poor.
Summary of the invention
The present invention provides a kind of slow drop control method in ramp, the slow drop control system in ramp and vehicle, the slow drop controls in the ramp
Method processed is easy to operate, can accurately reflect the driving intention of driver, has preferable driving experience.
The present invention provides a kind of slow drop control method in ramp, and this method comprises the following steps:
Judge whether off-road mode opens；
When the off-road mode is opened, judge the present speed of vehicle whether in scheduled speed interval, and vehicle
Whether the gradient of the slope surface at place is in scheduled gradient section；
If the present speed of vehicle is in the scheduled speed interval, and the gradient of slope surface where vehicle is described predetermined
Gradient section in, the slow drop control function activation in ramp, control vehicle is kept for working as when the slow drop control function activation in the ramp
Preceding speed traveling.
Further, present speed is kept when driving in control vehicle, this method further includes the operation of implementing monitoring vehicle
State, and according to the operating status of vehicle, output maintains vehicle with braking torque needed for present speed traveling.
Further, present speed is kept when driving in control vehicle, this method further includes detecting the presence of to change vehicle
The intention of present speed calculates working as vehicle at the end of the intention when detecting the intention for changing the present speed of vehicle
Preceding speed judges the present speed of the vehicle at the end of intention whether in the scheduled speed interval, if the intention knot
In scheduled speed interval, the slow drop control function in the ramp is kept the present speed of vehicle at the end of the intention when beam
Vehicle with the intention at the end of vehicle present speed traveling.
Further, it detects gas pedal or whether brake pedal is in by the state of trampling, if the gas pedal or institute
It states brake pedal and is in the state trampled, detecting the gas pedal or brake pedal trample action terminates the current of rear vehicle
Speed judges the present speed of vehicle at this time whether in the scheduled speed interval, if the present speed of vehicle exists at this time
In the scheduled speed interval, the slow drop control function in the ramp is trampling the dynamic of the gas pedal or the brake pedal
After work, keep vehicle with the present speed traveling after trample action；If the present speed of vehicle is not predetermined at this time
Speed interval in, the slow drop control function in the ramp is closed.
Further, the scheduled speed interval is greater than First Speed threshold value and to be less than second speed threshold value, described
Scheduled gradient threshold value is greater than the first gradient threshold value.
The present invention also provides a kind of slow drop control systems in ramp, including drive mode switch, control unit, slope detection
Device, vehicle speed detector device and executive device, the drive mode switch will be selected for selecting the preset driving mode of vehicle
The driving pattern information selected is transferred to described control unit, the gradient of slope surface where the slope detection device detection vehicle, and
The grade information is transferred to described control unit, the vehicle speed detector device detects the present speed of vehicle, and this is current
Velocity information is transferred to described control unit, and scheduled speed interval and scheduled gradient area are stored in described control unit
Between, when described control unit detects that the drive mode switch has selected off-road mode, to the present speed and vehicle of vehicle
The gradient of slope surface where is analyzed, when the present speed of vehicle is in the scheduled speed interval, and where vehicle
When the gradient of slope surface is in the scheduled gradient section, described control unit starts the slow drop control function in ramp, and passes through institute
State present speed traveling when executive device control vehicle keeps the slow drop control function in the ramp to activate.
Further, the slow drop control system in the ramp further includes that speed changes device, and described control unit passes through described
Speed changes whether device detection driver has the intention for changing speed, changes the intention of speed if it exists, then passes through the vehicle
Speed detector detects the present speed of vehicle at the end of the intention, then controls vehicle by the executive device and keeps the meaning
The present speed of vehicle continues to travel at the end of figure.
Further, the slow drop control system in the ramp further includes temperature-detecting device, the temperature-detecting device detection
Temperature in the executive device, and the temperature information is transferred to described control unit, it is stored in described control unit pre-
Fixed temperature threshold, described control unit judge whether the temperature in the executive device is more than predetermined according to the temperature information
Temperature threshold, described control unit closes the slow drop control function in the ramp.
Further, the slow drop control system in the ramp further includes display device, and when the ramp, slow drop control function is moved back
When out or breaking down, described control unit show on said display means represent the ramp it is slow drop control function exit or
The information of failure.
The present invention also provides a kind of vehicle, which includes the slow drop control system in above-mentioned ramp.
In conclusion in the present invention, the slow drop control function of the environment on the one hand faced by off-road mode and ramp
Identical, on the other hand its control strategy and the slow drop control function in ramp are similar, therefore compared with the prior art, ramp is delayed
Drop control function is incorporated under off-road mode, only in the case where vehicle is in off-road mode, the slow drop control function in ramp
It can activate, this can remove the control switch of the slow drop control function in ramp, reduce the complexity that driver operates vehicle.Separately
On the one hand, after the condition for meeting the slow drop control function in ramp, be no longer when present speed is more than scheduled speed interval,
Speed is modified, as long as speed is maintained in scheduled speed interval, not to the speed in scheduled speed interval
It is handled, but when present speed is in scheduled speed interval, the slow drop control function in ramp can just activate, and then drive
When the person of sailing does not apply other operations, control vehicle keeps present speed traveling, in such manner, it is possible to prevent the present speed of vehicle pre-
The variation that speedup or deceleration occur in fixed speed interval, can control vehicle and is travelled with present speed always, correctly instead
The driving intention for reflecting driver reduces the operation of driver, improves driving experience.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 show the control logic schematic diagram of the slow drop control method in ramp provided in an embodiment of the present invention.
Fig. 2 show the system block diagram of the slow drop control system in ramp provided in an embodiment of the present invention.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, it is as follows that the present invention is described in detail.
The present invention provides a kind of slow drop control method in ramp, the slow drop control system in ramp and vehicle, the slow drop controls in the ramp
Method processed is easy to operate, can accurately reflect the driving intention of driver, has preferable driving experience.
Fig. 1 show the control logic schematic diagram of the slow drop control method in ramp provided in an embodiment of the present invention, such as Fig. 1 institute
Show, the slow drop control method in ramp provided by the invention includes the following steps:
Judge whether off-road mode opens；
When off-road mode open when, judge the present speed of vehicle whether in scheduled speed interval, and vehicle where
Whether the gradient of slope surface is in scheduled gradient section；
If the present speed of vehicle is in scheduled speed interval, and the gradient of the slope surface where vehicle is in the scheduled gradient
In section, slow drop control function (the HDC:Hill Descent Control) activation in ramp, control vehicle keeps the slow drop control in ramp
Present speed traveling when function activation processed.
In the present embodiment, since on the one hand the environment that is faced is identical as the slow control function that drops in ramp for off-road mode, separately
On the one hand its control strategy and the slow drop control function in ramp are similar, therefore compared with the prior art, by the slow drop control in ramp
Function is incorporated under off-road mode, and only in the case where vehicle is in off-road mode, the slow drop control function in ramp can
Activation, this can remove the control switch of the slow drop control function in ramp, reduce the complexity that driver operates vehicle.Another party
Face is no longer when present speed is more than scheduled speed interval, to vehicle after the condition for meeting the slow drop control function in ramp
Speed is modified, as long as speed is maintained in scheduled speed interval, is not carried out to the speed in scheduled speed interval
Processing, but when present speed is in scheduled speed interval, the slow drop control function in ramp can just activate, then in driver
When not applying other operations, control vehicle keeps present speed traveling, in such manner, it is possible to prevent the present speed of vehicle scheduled
The variation that speedup or deceleration occur in speed interval can control vehicle working as when activating with the slow drop control function in ramp always
Preceding speed traveling, speed will not change because of extraneous factors such as the gradients of slope surface again, correctly reflect the driving meaning of driver
Figure reduces the operation of driver, improves driving experience.
Specifically, in the present embodiment, scheduled speed interval is First Speed threshold value to the section of second speed threshold value,
Preferably, scheduled speed interval is to be less than 40Km/h greater than 7Km/h, that is, when present speed is greater than 7Km/h and is less than
When 40Km/h, present speed is in scheduled speed interval.If present speed is less than 7Km/h, or is greater than 40Km/h, even if vehicle
In the off-road mode, the slow drop control function in ramp will not start, and the slow drop control function in ramp will not be to the speed of vehicle
It is revised.
Scheduled gradient section is greater than the first gradient threshold value, it is preferable that scheduled gradient section is that the gradient is greater than 7%,
That is, even if vehicle is in off-road mode, the slow drop control function in ramp will not when the gradient where vehicle is less than 7%
Starting.
After the slow drop control function activation in ramp, this method further includes the operating status of real time monitoring vehicle, and according to vehicle
Operating status, output maintains vehicle to travel required braking torque with present speed, keeps current speed to control vehicle
Degree traveling.Monitor vehicle operating status when, monitoring information can according to need depending on, as gas pedal aperture,
The aperture of brake pedal, the gradient of vehicle and/or acceleration of vehicle etc..
Further, in the present embodiment, present speed is kept when driving in control vehicle, this method further includes detecting
Whether there is or not the intentions for the present speed for changing vehicle to calculate the intention when detecting the intention for changing the present speed of vehicle
At the end of vehicle present speed, judge the present speed of the vehicle at the end of intention whether in scheduled speed interval,
If the present speed of vehicle is in scheduled speed interval at the end of the intention, the slow drop control function in ramp terminates in the intention
When, keep vehicle with the intention at the end of vehicle present speed traveling.If the present speed of vehicle does not exist at the end of the intention
In scheduled speed interval, then the slow drop control function in ramp terminates.
Specifically, this method can continue detection gas pedal or whether brake pedal is in by the state of trampling, if being in
By the state of trampling, then illustrate that driver has the intention of acceleration or deceleration, detecting gas pedal or brake pedal trample action terminates
The present speed of rear vehicle judges the present speed of vehicle at this time whether in scheduled speed interval, if the present speed exists
In scheduled speed interval, the slow drop control function in ramp keeps vehicle after trampling the movement of gas pedal or brake pedal
It is travelled with present speed；If the present speed, outside scheduled speed interval, the slow drop function in ramp is closed, no longer to vehicle
Speed be modified, when the slow drop control function in ramp makes present speed pre- due to gas pedal or brake pedal are trampled
When outside fixed speed interval, this method further includes the prompt for providing the slow drop control function in ramp and closing.
Further, this method further includes detecting to relevant device, interface and the network of the slow drop control function in ramp,
If relevant device, interface and the network of the slow drop control function in ramp, if brake disc temperature is excessively high, network communication failure and/or each
Communication interface when something goes wrong, closes the slow drop control function in ramp, and issue failure alarm, such as shows that ramp is slow by instrument board
Control function failure is dropped, driver is prompted to carry out from main modulation speed.
Further, if this method further includes the slow drop control function in ramp by carrying out control for brake to vehicle, with control
Vehicle keeps present speed when driving, lights Brake lamp, to remind front vehicle, guarantees safe distance.
In conclusion in the present invention, the slow drop control function of the environment on the one hand faced by off-road mode and ramp
Identical, on the other hand its control strategy and the slow drop control function in ramp are similar, therefore compared with the prior art, ramp is delayed
Drop control function is incorporated under off-road mode, only in the case where vehicle is in off-road mode, the slow drop control function in ramp
It can activate, this can remove the control switch of the slow drop control function in ramp, reduce the complexity that driver operates vehicle.Separately
On the one hand, after the condition for meeting the slow drop control function in ramp, be no longer when present speed is more than scheduled speed interval,
Speed is modified, as long as speed is maintained in scheduled speed interval, not to the speed in scheduled speed interval
It is handled, but when present speed is in scheduled speed interval, the slow drop control function in ramp can just activate, and then drive
When the person of sailing does not apply other operations, control vehicle keeps present speed traveling, in such manner, it is possible to prevent the present speed of vehicle pre-
The variation that speedup or deceleration occur in fixed speed interval, can control vehicle and is travelled with present speed always, correctly instead
The driving intention for reflecting driver reduces the operation of driver, improves driving experience.
Fig. 2 show the system block diagram of the slow drop control system in ramp provided in an embodiment of the present invention, as shown in Fig. 2, this hair
Bright to additionally provide a kind of slow drop control system in ramp, which includes drive mode switch 10, control unit 20, gradient inspection
Device 30, vehicle speed detector device 40 and executive device 50 are surveyed, drive mode switch 10 is used to select the preset driving mode of vehicle,
And the driving pattern information of selection is transferred to control unit 20, the gradient of slope surface where slope detection device 30 detects vehicle is simultaneously
The grade information is transferred to control unit 20, vehicle speed detector device 40 detects the present speed of vehicle, and by the present speed
Information is transferred to control unit 20, and scheduled speed interval and scheduled gradient section are stored in control unit 20, and control is single
Member 20 is when detecting that drive mode switch 10 has selected off-road mode, the slope of slope surface where the present speed and vehicle to vehicle
Degree is analyzed, and when the present speed of vehicle is in scheduled speed interval, and the gradient of the slope surface where vehicle is scheduled
When in gradient section, control unit 20 starts the slow drop control function in ramp, controls vehicle by executive device 50 and keeps the slope
Present speed traveling when the slow drop control function in road activates.
Further, in the present embodiment, control unit 20 can be electronic stabilizing control system (ESC, Electronic
Stability Controller), wherein the scheduled speed interval stored is First Speed threshold value to second speed threshold value, when
Present speed be greater than First Speed threshold value, and be less than second speed threshold value when, present speed is located in scheduled speed interval.Control
The predetermined slope section that unit 20 processed stores is greater than the first gradient threshold value, and the gradient of slope surface is greater than first gradient where vehicle
When threshold value, control unit 20 is that the gradient of slope surface where can determine whether vehicle is located in scheduled gradient section.
In the present embodiment, slope detection device 30 can be inertial sensor.Vehicle speed detector device 40 can be speed
Sensor.Executive device 50 can be electronics booster.
Further, in the present embodiment, which further includes that speed changes device 60, such as gas pedal and/or
Brake pedal, control unit 20 change device 60 by speed and detect whether driver has the intention for changing speed, such as detect oil
Whether door pedal or brake pedal are trampled, and change the intention of speed if it exists, then detect the meaning by vehicle speed detector device 40
Then the present speed of vehicle at the end of figure controls the current speed that vehicle keeps vehicle at the end of the intention by executive device 50
Degree continues to travel.
Further, which further includes temperature detector 70, and temperature detector 70 detects executive device 50, such as brake disc
On temperature, and the temperature information is transferred to control unit 20, scheduled temperature threshold is stored in control unit 20, according to
The temperature information judges whether the temperature in executive device 50 is more than scheduled temperature threshold, the temperature in executive device 50
When more than scheduled temperature threshold, control unit 20 closes the slow drop control function in ramp, even if also the slow drop control function in ramp is moved back
Out.
Further, which further includes display device 80, such as instrument board.When ramp slow drop control function exit or
When person is broken down, control unit 20 is shown in display device 80 represents what the slow drop control function in ramp exited or broke down
Information.
The control system further includes Brake lamp 90, when control unit 20 brakes vehicle by executive device 50,
Control unit 20 can light Brake lamp 90, to remind front vehicle, guarantee safe distance.
The present invention also provides a kind of vehicle, which includes the slow drop control system in above-mentioned ramp, about its of the vehicle
Its technical characteristic, refers to the prior art, and details are not described herein.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of slow drop control method in ramp, it is characterised in that: this method comprises the following steps:
Judge whether off-road mode opens；
When the off-road mode open when, judge the present speed of vehicle whether in scheduled speed interval, and vehicle where
Slope surface the gradient whether in scheduled gradient section；
If the present speed of vehicle is in the scheduled speed interval, and the gradient of slope surface where vehicle is on the scheduled slope
It spends in section, ramp is slow to drop control function activation, current speed when control vehicle keeps the slow drop control function in the ramp to activate
Degree traveling.
2. the slow drop control method in ramp according to claim 1, it is characterised in that: keep present speed row in control vehicle
When sailing, this method further includes the operating status of implementing monitoring vehicle, and according to the operating status of vehicle, output maintains vehicle to work as
Braking torque needed for preceding speed traveling.
3. the slow drop control method in ramp according to claim 1, it is characterised in that: keep present speed row in control vehicle
When sailing, this method further includes detecting the presence of the intention for the present speed for changing vehicle, when the current speed for detecting change vehicle
When the intention of degree, the present speed of vehicle at the end of the intention is calculated, judges that the present speed of the vehicle at the end of intention is
It is no in the scheduled speed interval, if the present speed of vehicle is described in scheduled speed interval at the end of the intention
The slow drop control function in ramp at the end of the intention, keep vehicle with the intention at the end of vehicle present speed traveling.
4. the slow drop control method in ramp according to claim 3, it is characterised in that: detection gas pedal or brake pedal are
It is no to be in by the state of trampling, if the gas pedal or the brake pedal are in the state trampled, detect the throttle and step on
Whether plate or brake pedal trample action terminate the present speed of rear vehicle, judge the present speed of vehicle at this time described predetermined
Speed interval in, if the present speed of vehicle is in the scheduled speed interval at this time, the slow drop control function in the ramp
After trampling the movement of the gas pedal or the brake pedal, keep vehicle with the current speed after trample action
Degree traveling；If the present speed of vehicle is not in scheduled speed interval at this time, the slow drop control function in the ramp is closed.
5. the slow drop control method in ramp according to claim 1, it is characterised in that: the scheduled speed interval be greater than
First Speed threshold value and be less than second speed threshold value, the scheduled gradient threshold value be greater than the first gradient threshold value.
6. a kind of slow drop control system in ramp, it is characterised in that: including drive mode switch, control unit, slope detection device,
Vehicle speed detector device and executive device, the drive mode switch is for selecting the preset driving mode of vehicle, and by selection
Driving pattern information is transferred to described control unit, the gradient of slope surface where the slope detection device detection vehicle, and should
Grade information is transferred to described control unit, the present speed of the vehicle speed detector device detection vehicle, and by the present speed
Information is transferred to described control unit, and scheduled speed interval and scheduled gradient section are stored in described control unit, when
When described control unit detects that the drive mode switch has selected off-road mode, where the present speed and vehicle to vehicle
The gradient of slope surface is analyzed, when the present speed of vehicle is in the scheduled speed interval, and the slope surface where vehicle
When the gradient is in the scheduled gradient section, described control unit starts the slow drop control function in ramp, and passes through the execution
Present speed traveling when device control vehicle keeps the slow drop control function in the ramp to activate.
7. the slow drop control system in ramp according to claim 6, it is characterised in that: the slow drop control system in the ramp is also wrapped
It includes speed and changes device, described control unit changes device by the speed and detects whether driver has the meaning for changing speed
Figure changes the intention of speed if it exists, then the present speed of vehicle at the end of the intention is detected by the vehicle speed detector device,
Then controlling vehicle by the executive device keeps the present speed of vehicle at the end of the intention to continue to travel.
8. the slow drop control system in ramp according to claim 6, it is characterised in that: the slow drop control system in the ramp is also wrapped
Temperature-detecting device is included, the temperature-detecting device detects the temperature in the executive device, and the temperature information is transferred to
Described control unit stores scheduled temperature threshold in described control unit, and described control unit is sentenced according to the temperature information
Whether the temperature in the executive device of breaking is more than scheduled temperature threshold, and described control unit closes the slow drop control in the ramp
Function.
9. the slow drop control system in ramp according to claim 6, it is characterised in that: the slow drop control system in the ramp is also wrapped
Display device is included, when slow drop control function is exited or broken down when the ramp, described control unit is in the display device
Upper display represents the information that the slow drop control function in the ramp exits or breaks down.
10. a kind of vehicle, it is characterised in that: the vehicle includes the slow drop control in ramp described in any one of claim 6 to 9
System processed.
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