CN109733190A - A kind of vehicle travel control system and method - Google Patents
A kind of vehicle travel control system and method Download PDFInfo
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- CN109733190A CN109733190A CN201910046441.8A CN201910046441A CN109733190A CN 109733190 A CN109733190 A CN 109733190A CN 201910046441 A CN201910046441 A CN 201910046441A CN 109733190 A CN109733190 A CN 109733190A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000446 fuel Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 21
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 241001417527 Pempheridae Species 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The invention discloses a kind of vehicle travel control system and methods, including controller, high low speed switch unit and differential unit；High low speed switch unit includes high low speed switching switch and high low speed switching valve, and high low speed switching switch is connected with controller；The control terminal of high low speed switching valve is connected with the output end of controller；Differential unit includes that differential-lock control, the first differential valve, the second differential valve and four velocity sensors, the output end of differential-lock control are connected with controller, and the control terminal of the first differential valve and the second differential valve is connected with the output end of controller respectively；Four velocity sensors are respectively used on the correspondence wheel being installed on vehicle, and the output end of four velocity sensors is connected with controller respectively.It when the present invention realizes high speed walking, is driven using two front wheels, the speed of travel is fast, is suitble to transition；When low speed is walked, using four-wheel drive, the speed of travel is slow, and driving force is big, is suitble to operation.
Description
Technical field
The invention belongs to technical field of vehicle control, and in particular to a kind of vehicle travel control system and method.
Background technique
Based on the cleaning on the street lane in most domestic city, park, square pavement is cleaned with manpower at present, with city
Development and cost of labor rising, this cleaning method will more replace by the higher road sweeper of cleaning machine degree.Bavin
Oily road sweeper has been widely applied because its is compact-sized, easy to operate, sweeping efficiency is high.
By the diesel oil road sweeper status in investigation industry, discovery vehicle driving braking system generallys use single driving side
Formula does not distinguish operation and walking mode, converts without the power allocation model of work pattern and walking mode, is unfavorable for playing whole
Machine performance, and mechanical parking brake is mostly used, mechanical parking brake operates relatively elaborate when vehicle uses longer year or winter.Separately
Outside, mechanical parking brake in the case of long-term use, can make steel wire pull line that irreversible plastic deformation occur, and then cause safety hidden
Suffer from, threatens the traffic safety of driver.
For diesel oil road sweeper when carrying out cleaning work or climbing, the driving force of demand is larger, it is desirable that runs at a low speed, transition
When demand driving force it is smaller, then require run at high speed.Under the poor road conditions such as snowfield, miriness, hollow, it is possible that part
Wheel loses adhesive force due to wet and slippery, aerial, and since the influence of between centers and inter-wheel differential will lead to power, all remittance is beaten
Sheave forms idle running, and cohesive stationary wheels cannot get power, and then vehicle can not normally travel advance.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of vehicle travel control system and method, when realizing high speed and walking, make
It is driven with two front wheels, the speed of travel is fast, is suitble to transition；When low speed is walked, using four-wheel drive, the speed of travel is slow, and driving force is big,
It is suitble to operation.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the invention is realized by the following technical scheme:
In a first aspect, the present invention provides a kind of vehicle travel control systems, comprising:
Controller；
High low speed switch unit, the high low speed switch unit include high low speed switching switch and high low speed switching valve, the height
The output end of low speed switching switch is connected with controller；The high low speed switching valve is connected with hydraulic pump in the car for installing
Total oil circuit on, control terminal is connected with the output end of the controller；
Differential unit, the differential unit include differential-lock control, the first differential valve, the second differential valve and four velocity pick-ups
Device, the output end of the differential-lock control are connected with the controller, the control terminal of first differential valve and the second differential valve
It is connected respectively with the output end of the controller, the two is respectively used to first point of oil that installation is connected with total oil circuit in the car
On road and second point of oil circuit, first point of oil circuit be two wheels of front part of vehicle in one of fuel feeding, described second point
Oil circuit is used for as one of fuel feeding in two wheels of vehicle rear；Four velocity sensors are respectively used to be mounted on vehicle
On correspondence wheel on, the output end of four velocity sensors is connected with the controller respectively.
Preferably, the vehicle travel control system further includes electronics parking brake unit, and the electronics parking brake unit includes electricity
The output end of sub- parking brake switch and electronics parking brake valve, the electronics parking brake switch is connected with the controller, the electronics parking brake
For installing the total oil circuit being connected in the car with hydraulic pump, control terminal is connected valve with the output end of the controller；
Preferably, the vehicle travel control system further includes gas pedal, and the gas pedal is for being mounted on driving for vehicle
Interior is sailed, output end is connected with the input terminal of controller.
Preferably, the high low speed switching switch, differential-lock control and electronics parking brake switch are set to driver's cabin steering wheel
Below thick pillar.
Preferably, when electronics parking brake valve works, total oil circuit on vehicle is closed；When the work of high low speed switching valve,
The discharge capacity of total oil circuit on vehicle becomes larger or reduces.
Preferably, the vehicle travel control system further includes display, and the display is set in driver's cabin, and described
Controller is connected.
Second aspect, the present invention provides a kind of vehicle travel control methods, comprising:
Start the high low speed switching switch in high low speed switch unit, controller opens high low speed according to the switching signal received
Switching valve, vehicle enter low speed 4 wheel driven state by high speed forerunner's state；
Start the differential-lock control in differential unit, controller opens the first differential valve and second according to the differential signal received
Differential valve, four velocity sensor output speed signals of real-time reception, and it is poor according to each rate signal control first received
Fast valve and the second differential valve, until the speed signal of four velocity sensors output meets the requirement of setting or receives differential
The pent signal of lock-switch, controller close first differential valve and the second differential valve.
Preferably, the control method for vehicle further include:
When the high low speed closed in high low speed switch unit switches switch, controller is according to the high low speed of the signal-off received
Switching valve, vehicle enter two front wheels driving condition.
Preferably, the control method for vehicle further include:
When velocity sensor detects that speed is greater than given threshold, controller does not start electronics parking brake unit；
When velocity sensor detect speed be greater than given threshold, and in electronics parking brake unit electronics parking brake switch in open
When state, electronics parking brake valve is opened by controller, vehicle enters parked state；When electronics parking brake switch is closed, pass through
Controller closes electronics parking brake valve.
Preferably, the control method for vehicle further include:
When vehicle is under parked state, start gas pedal, controller output signal closes electronics parking brake valve.
Compared with prior art, beneficial effects of the present invention:
Vehicle travel control system and method for the invention is enabled to vehicle when high speed is walked, is driven using two front wheels, row
It is fast to walk speed, is suitble to transition；When low speed is walked, using four-wheel drive, the speed of travel is slow, and driving force is big, is suitble to operation.
Vehicle travel control system and method for the invention, in the case of vehicle is in four-wheel drive, pavement behavior not
Differential lock can be enabled in the case where good, prevents tire from having skidded phenomenon due to the adhesive force difference with ground；Road surface compared with
Differential lock can be closed in the case where for platform, can prevent oil temperature in hydraulic system from overheating, reduces crushing, improve hoofing part efficiency,
Tire wear phenomenon caused by interior outer wheel speeds are inconsistent when under any mode there is no due to the steering of body frame structure for automotive bring.
Differential function can be enabled in the case where pavement behavior is bad, prevent tire from having skidded due to the adhesive force difference with ground
Phenomenon；Differential function can be closed in the case where more platform on road surface, can prevent oil temperature in hydraulic system from overheating, reduces crushing, mentions
Height walking drive efficiency.
Compared to the space that traditional mechanical parking brake occupies middle control region in driver's cabin, electronics parking brake is used in the present invention,
Requirement can be met by only needing the installation space of very little, will be driven indoor hand-braking handle and be cancelled, and will reserve
Other operational and controlled key buttons are installed in more positions, reach saving and drive indoor segment space purpose；And stopping brake is by original
Driver firmly pull parking brake handle grip be changed to an electronics parking brake switch key, with a key operation advantage, simply
It is laborsaving, it avoids traditional parking brake from drawing the generation of not tight car slipping phenomenon, increases the operating comfort and convenience for driving vehicle.
Detailed description of the invention
Fig. 1 is the overall structure diagram of an embodiment of the present invention；
Fig. 2 is the structural schematic diagram in the vehicle drive room region Nei Zhongkong in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Embodiment 1
The embodiment of the invention provides a kind of vehicle travel control systems, comprising:
Controller 1, the controller 1 is for controlling each unit operation；
Display 2, the display 2 are set in driver's cabin, are connected with the controller 1；
High low speed switch unit, the high low speed switch unit includes that high low speed switches switch 3 and high low speed switching valve 6, described
The output end of high low speed switching switch 3 is connected with controller 1；The high low speed switching valve 6 for install in the car with it is hydraulic
On the connected total oil circuit of pump, control terminal is connected with the output end of the controller 1, when the work of high low speed switching valve 6, vehicle
On the discharge capacity of total oil circuit become larger or reduce；When practical application, the high low speed switching switch 3 is set to side in vehicle drive room
To below embraced column；
Differential unit, the differential unit include differential-lock control 5, the first differential valve 8, the second differential valve (not shown) and
Four velocity sensors 9, the output end of the differential-lock control 5 are connected with the controller 1, first differential valve 8 and
The control terminal of two differential valves is connected with the output end of the controller respectively, the two be respectively used to installation in the car with total oil circuit
On the first point of oil circuit and second point of oil circuit being connected, first point of oil circuit is one of them in two wheels of front part of vehicle
Fuel feeding, second point of oil circuit are used for as one of fuel feeding in two wheels of vehicle rear；Four velocity sensors 9
Be respectively used on the correspondence wheel being installed on vehicle, the output end of four velocity sensors 9 respectively with 1 phase of controller
Even；When practical application, the differential-lock control 5 is set in vehicle drive room below steering wheel thick pillar.
In conclusion vehicle may be implemented in a kind of vehicle travel control system of the embodiment of the present invention, (for example diesel oil sweeps road
Machine) switching of high low speed and differential mechanism locking, specific work process are as follows:
Start the high low speed switching switch 3 in high low speed switch unit, controller 1 opens height according to the switching signal received
Fast switching valve 6, vehicle enter low speed 4 wheel driven state when low speed is walked by high speed forerunner's state and use four-wheel drive, the speed of travel
Slowly, driving force is big, is suitble to operation；Or vehicle becomes high speed forerunner's state when high speed is walked by low speed 4 wheel driven state and uses two
Front-wheel drive, the speed of travel is fast, is suitble to transition；Realize high low speed handoff functionality.In a kind of specific implementation of the embodiment of the present invention
In mode, high speed forerunner's state is referred to when vehicle is under fast state, and vehicle is to utilize the two of vehicle front
A wheel driving；The low speed 4 wheel driven state refers to that when vehicle is under lower-speed state, vehicle is to utilize the four of vehicle
A wheel driving；The high speed is two relative velocities with low speed, for example, low speed can be 10km/h maximum speed, it is high
Speed can be 25km/h maximum speed, and since speed and torque are inversely proportional, specific threshold values needs are determined according to vehicle.
In the case where vehicle is in four-wheel drive state, differential lock can be enabled in the case where pavement behavior is bad, prevent from taking turns
Tire since the adhesive force difference with ground has skidded phenomenon, specifically: starting differential unit in differential-lock control 5, control
Device 1 opens the first differential valve 8 according to the differential signal received and the second differential valve, four velocity sensors 9 of real-time reception are defeated
Speed signal out, and according to each rate signal control the first differential valve 8 received and the second differential valve, until four speed pass
The speed signal that sensor 9 exports meets the requirement of setting or receives the pent signal of differential-lock control 5, and controller 1 closes
Close first differential valve 8 and the second differential valve；Differential lock can be closed in the case where road surface is more smooth, can prevent hydraulic pressure system
System oil overheating, reduces crushing, improves hoofing part efficiency, realizes differential lock function.
Embodiment 2
The present embodiment the difference from embodiment 1 is that: the vehicle travel control system further includes electronics parking brake unit, the electricity
Sub- parking brake unit includes electronics parking brake switch 4 and electronics parking brake valve 7, output end and the control of the electronics parking brake switch 4
Device 1 is connected, the electronics parking brake valve 7 for installing the total oil circuit being connected in the car with hydraulic pump, control terminal with it is described
The output end of controller 1 is connected, and when electronics parking brake valve 7 works, total oil circuit on vehicle is closed；It is described when practical application
Electronics parking brake switch 4 is set in vehicle drive room below steering wheel thick pillar.
Preferably, in a kind of specific embodiment of the embodiment of the present invention, the malfunction of electronics parking brake switch 4 in order to prevent
Make, the vehicle travel control system further includes gas pedal 10, and the gas pedal 10 is used to be mounted on the driver's cabin of vehicle
Interior, output end is connected with the input terminal of controller 1.
Rest part is same as Example 1.
In conclusion vehicle may be implemented in a kind of vehicle travel control system of the embodiment of the present invention, (for example diesel oil sweeps road
Machine) switching of high low speed and differential mechanism locking, specific work process are as follows:
Start the high low speed switching switch 3 in high low speed switch unit, controller 1 opens height according to the switching signal received
Fast switching valve 6, vehicle enter low speed 4 wheel driven state when low speed is walked by high speed forerunner's state and use four-wheel drive, the speed of travel
Slowly, driving force is big, is suitble to operation；Or vehicle becomes high speed forerunner's state when high speed is walked by low speed 4 wheel driven state and uses two
Front-wheel drive, the speed of travel is fast, is suitble to transition；
In the case where vehicle is in four-wheel drive state, differential lock can be enabled in the case where pavement behavior is bad, prevent tire by
Phenomenon is had skidded in the adhesive force difference with ground, specifically: the differential-lock control 5 in starting differential unit, controller 1
The first differential valve 8 and the second differential valve, four 9 output speeds of velocity sensor of real-time reception are opened according to the differential signal received
Signal, and according to each rate signal control the first differential valve 8 and the second differential valve 11 received, until four velocity sensors
The speed signal of 9 outputs meets the requirement of setting or receives the pent signal of differential-lock control 5, and controller 1 closes institute
State the first differential valve 8 and the second differential valve 11；Differential lock can be closed in the case where more platform on road surface, hydraulic system can be prevented
Oil overheating reduces crushing, improves hoofing part efficiency；
The travel speed V of vehicle is monitored by velocity sensor 9, and is transmitted to controller 1 and display 2.
As V > 5km/h, electronic parking disabler, i.e. controller do not start electronics parking brake unit；
As V≤5km/h, and when electronics parking brake switch 4 is opened, electronics parking brake valve 7 is opened by controller, vehicle enters parking
State closes electronics parking brake valve 7 by controller 1 when electronics parking brake switch 4 is closed.
Under parked state, gas pedal 10 is dubbed, when gas pedal electric signal input controller 1,1 output signal of controller
Electronics parking brake valve 7 is closed, can be walked without releasing electronic parking manually.
Embodiment 3
The embodiment of the invention provides a kind of vehicle travel control methods, comprising:
Start the high low speed switching switch 3 in high low speed switch unit, controller 1 opens height according to the switching signal received
Fast switching valve 6, vehicle enter low speed 4 wheel driven state by high speed forerunner's state；
Start the differential-lock control 5 in differential unit, controller 1 opens 8 He of the first differential valve according to the differential signal received
Second differential valve, four velocity sensors of real-time reception, 9 output speed signal, and according to each rate signal control received
One differential valve 8 and the second differential valve, until the speed signal of four velocity sensors 9 output meets the requirement or reception of setting
To the pent signal of differential-lock control 5, controller 1 closes first differential valve 8 and the second differential valve.
Control method for vehicle in the present embodiment can be realized based on the vehicle travel control system in embodiment 1.
Embodiment 4
The present embodiment and the difference of embodiment 3 be, the control method for vehicle further include:
When the high low speed closed in high low speed switch unit switches switch 3, controller 1 is according to the signal-off height received
Fast switching valve 6, vehicle enter two front wheels driving condition.
Preferably, the control method for vehicle further include:
When velocity sensor 9 detects that speed is greater than given threshold, controller 1 does not start electronics parking brake unit；The setting
Threshold value can take 5km/h；
When velocity sensor 9 detects that speed is greater than given threshold, and the electronics parking brake switch 4 in electronics parking brake unit is in opening
When opening state, electronics parking brake valve 7 is opened by controller 1, vehicle enters parked state；When electronics parking brake switch 4 is closed,
Electronics parking brake valve 7 is closed by controller 1.
Preferably, the control method for vehicle further include:
When vehicle is under parked state, start gas pedal 10,1 output signal of controller closes electronics parking brake valve 7.
Control method for vehicle in the present embodiment can be realized based on the vehicle travel control system in embodiment 2.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of vehicle travel control system characterized by comprising
Controller；
High low speed switch unit, the high low speed switch unit include high low speed switching switch and high low speed switching valve, the height
The output end of low speed switching switch is connected with controller；The high low speed switching valve is connected with hydraulic pump in the car for installing
Total oil circuit on, control terminal is connected with the output end of the controller；
Differential unit, the differential unit include differential-lock control, the first differential valve, the second differential valve and four velocity pick-ups
Device, the output end of the differential-lock control are connected with the controller, the control terminal of first differential valve and the second differential valve
It is connected respectively with the output end of the controller, the two is respectively used to first point of oil that installation is connected with total oil circuit in the car
On road and second point of oil circuit, first point of oil circuit be two wheels of front part of vehicle in one of fuel feeding, described second point
Oil circuit is used for as one of fuel feeding in two wheels of vehicle rear；Four velocity sensors are respectively used to be mounted on vehicle
On correspondence wheel on, the output end of four velocity sensors is connected with the controller respectively.
2. a kind of vehicle travel control system according to claim 1, it is characterised in that: the vehicle travel control system
It further include electronics parking brake unit, the electronics parking brake unit includes electronics parking brake switch and electronics parking brake valve, the electronics parking brake
The output end of switch is connected with the controller, and the electronics parking brake valve is for installing the total oil being connected in the car with hydraulic pump
On the road, control terminal is connected with the output end of the controller.
3. a kind of vehicle travel control system according to claim 2, it is characterised in that: the vehicle travel control system
It further include gas pedal, the gas pedal is for being mounted in the driver's cabin of vehicle, the input terminal of output end and controller
It is connected.
4. a kind of vehicle travel control system according to claim 2, it is characterised in that: the high low speed switching switch,
Differential-lock control and electronics parking brake switch are set to below driver's cabin steering wheel thick pillar.
5. a kind of vehicle travel control system according to claim 2, it is characterised in that: when the work of electronics parking brake valve,
Total oil circuit on vehicle is closed；When the work of high low speed switching valve, the discharge capacity of total oil circuit on vehicle becomes larger or reduces.
6. a kind of vehicle travel control system according to claim 2, it is characterised in that: the vehicle travel control system
It further include display, the display is set in driver's cabin, is connected with the controller.
7. a kind of vehicle travel control method characterized by comprising
Start the high low speed switching switch in high low speed switch unit, controller opens high low speed according to the switching signal received
Switching valve, vehicle enter low speed 4 wheel driven state by high speed forerunner's state；
When vehicle is in low speed 4 wheel driven state, start the differential-lock control in differential unit, controller is according to the difference received
Fast signal opens the first differential valve and the second differential valve, four velocity sensor output speed signals of real-time reception, and according to connecing
The first differential valve of each rate signal control received and the second differential valve, until the speed signal symbol of four velocity sensor output
It closes the requirement of setting or receives the pent signal of differential-lock control, controller closes first differential valve and second poor
Fast valve.
8. a kind of vehicle travel control method according to claim 7, which is characterized in that the control method for vehicle also wraps
It includes:
When the high low speed closed in high low speed switch unit switches switch, controller is according to the high low speed of the signal-off received
Switching valve, vehicle enter two front wheels driving condition.
9. a kind of vehicle travel control method according to claim 7, which is characterized in that the control method for vehicle also wraps
It includes:
When velocity sensor detects that speed is greater than given threshold, controller does not start electronics parking brake unit；
When velocity sensor detect speed be greater than given threshold, and in electronics parking brake unit electronics parking brake switch in open
When state, electronics parking brake valve is opened by controller, vehicle enters parked state；When electronics parking brake switch is closed, pass through
Controller closes electronics parking brake valve.
10. a kind of vehicle travel control method according to claim 9, which is characterized in that the control method for vehicle is also
Include:
When vehicle is under parked state, start gas pedal, controller output signal closes electronics parking brake valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910046441.8A CN109733190B (en) | 2019-01-18 | 2019-01-18 | Vehicle running control system and method |
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| CN201910046441.8A CN109733190B (en) | 2019-01-18 | 2019-01-18 | Vehicle running control system and method |
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| CN109733190B CN109733190B (en) | 2024-06-14 |
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| WO2023000897A1 (en) * | 2021-07-21 | 2023-01-26 | 长城汽车股份有限公司 | Vehicle control method and apparatus in four-wheel drive mode, and vehicle |
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| CN108928773A (en) * | 2018-07-03 | 2018-12-04 | 杭叉集团股份有限公司 | A kind of All-terrain Forklift transmission device and All-terrain Forklift |
| CN209938318U (en) * | 2019-01-18 | 2020-01-14 | 徐州徐工环境技术有限公司 | Vehicle driving control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114401871A (en) * | 2019-09-18 | 2022-04-26 | 卡特彼勒Sarl | Hydraulic valve module and method for supplying hydraulic pressure to a circuit of a vehicle |
| CN114401871B (en) * | 2019-09-18 | 2024-01-05 | 卡特彼勒Sarl | Hydraulic valve module and method for supplying hydraulic pressure to a circuit of a vehicle |
| WO2023000897A1 (en) * | 2021-07-21 | 2023-01-26 | 长城汽车股份有限公司 | Vehicle control method and apparatus in four-wheel drive mode, and vehicle |
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