CN209938318U - Vehicle driving control system - Google Patents
Vehicle driving control system Download PDFInfo
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- CN209938318U CN209938318U CN201920081655.4U CN201920081655U CN209938318U CN 209938318 U CN209938318 U CN 209938318U CN 201920081655 U CN201920081655 U CN 201920081655U CN 209938318 U CN209938318 U CN 209938318U
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Abstract
The utility model discloses a vehicle running control system, which comprises a controller, a high-low speed switching unit and a differential unit; the high-low speed switching unit comprises a high-low speed switch and a high-low speed switching valve, and the high-low speed switch is connected with the controller; the control end of the high-low speed switching valve is connected with the output end of the controller; the differential unit comprises a differential lock switch, a first differential valve, a second differential valve and four speed sensors, wherein the output end of the differential lock switch is connected with the controller, and the control ends of the first differential valve and the second differential valve are respectively connected with the output end of the controller; the four speed sensors are respectively used for being installed on corresponding wheels on the vehicle, and the output ends of the four speed sensors are respectively connected with the controller. The utility model realizes the high-speed walking, uses two front wheels to drive, has high walking speed and is suitable for transition; when the vehicle runs at a low speed, four-wheel drive is used, so that the vehicle runs at a low speed, has high driving force and is suitable for operation.
Description
Technical Field
The utility model belongs to the technical field of vehicle control, concretely relates to vehicle control system that traveles.
Background
At present, the street lane, park and square sidewalk in most of domestic cities are mainly cleaned by manpower, and along with the development of cities and the increase of labor cost, the cleaning mode replaces the road sweeper with higher mechanical degree. The diesel road sweeper has been widely applied due to compact structure, simple operation and high sweeping efficiency.
By investigating the current situation of diesel road sweepers in the industry, the situation that a vehicle running braking system usually adopts a single driving mode, does not distinguish operation modes and walking modes, does not have power distribution mode conversion of the operation modes and the walking modes, is not beneficial to exerting the performance of the whole machine, and mostly adopts a mechanical hand brake which is relatively laborious to operate when the vehicle is long in service life or in winter. In addition, the mechanical hand brake can lead the steel wire to generate irreversible plastic deformation under the condition of long-term use, thereby leading to potential safety hazard and threatening the driving safety of a driver.
When the diesel road sweeper is used for cleaning or climbing, the required driving force is large, low-speed running is required, and when the required driving force is small during transition, high-speed running is required. Under poor road conditions such as snowy ground, muddy, pothole and the like, partial wheels may lose adhesive force due to wet slip and overhead, power is completely converged into slipping wheels due to the influence of inter-axle and inter-wheel differentials to form idle running, and static wheels with adhesive force cannot obtain power, so that the vehicle cannot normally run and advance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a vehicle running control system, which realizes the high-speed running by using two front wheels to drive, has high running speed and is suitable for transition; when the vehicle runs at a low speed, four-wheel drive is used, so that the vehicle runs at a low speed, has high driving force and is suitable for operation.
Realize above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
in a first aspect, the present invention provides a vehicle driving control system, including:
a controller;
the high-low speed switching unit comprises a high-low speed switch and a high-low speed switching valve, and the output end of the high-low speed switch is connected with the controller; the high-low speed switching valve is used for being arranged on a main oil path connected with a hydraulic pump in a vehicle, and the control end of the high-low speed switching valve is connected with the output end of the controller;
the differential unit comprises a differential lock switch, a first differential valve, a second differential valve and four speed sensors, wherein the output end of the differential lock switch is connected with the controller, the control ends of the first differential valve and the second differential valve are respectively connected with the output end of the controller, the first differential valve and the second differential valve are respectively used for being installed on a first oil distribution path and a second oil distribution path which are communicated with a main oil path in a vehicle, the first oil distribution path supplies oil to one of two wheels at the front part of the vehicle, and the second oil distribution path supplies oil to one of two wheels at the rear part of the vehicle; the four speed sensors are respectively used for being installed on corresponding wheels on the vehicle, and the output ends of the four speed sensors are respectively connected with the controller.
Preferably, the vehicle running control system further comprises an electronic hand brake unit, the electronic hand brake unit comprises an electronic hand brake switch and an electronic hand brake valve, an output end of the electronic hand brake switch is connected with the controller, the electronic hand brake valve is used for being installed on a main oil path connected with the hydraulic pump in the vehicle, and a control end of the electronic hand brake valve is connected with an output end of the controller;
preferably, the vehicle running control system further comprises an accelerator pedal, wherein the accelerator pedal is installed in a cab of the vehicle, and the output end of the accelerator pedal is connected with the input end of the controller. .
Preferably, the high-low speed change-over switch, the differential lock switch and the electronic hand brake switch are all arranged below the holding column of the steering wheel of the cab.
Preferably, when the electronic hand brake valve works, a main oil path on the vehicle is closed; when the high-low speed switching valve works, the displacement of the total oil path on the vehicle becomes large or small.
Preferably, the vehicle driving control system further comprises a display, and the display is arranged in the cab and connected with the controller.
In a second aspect, the present invention provides a vehicle driving control method, including:
starting a high-low speed change-over switch in the high-low speed change-over unit, starting a high-low speed change-over valve by a controller according to a received change-over signal, and enabling the vehicle to enter a low-speed four-wheel drive state from a high-speed front drive state;
starting a differential lock switch in the differential unit, starting a first differential valve and a second differential valve by a controller according to received differential signals, receiving speed signals output by four speed sensors in real time, controlling the first differential valve and the second differential valve according to the received speed signals until the speed signals output by the four speed sensors meet set requirements or receiving signals that the differential lock switch is closed, and closing the first differential valve and the second differential valve by the controller.
Preferably, the vehicle travel control method further includes:
when the high-low speed change-over switch in the high-low speed change-over unit is closed, the controller closes the high-low speed change-over valve according to the received signal, and the vehicle enters a two-front-wheel driving state.
Preferably, the vehicle travel control method further includes:
when the speed sensor detects that the speed of the vehicle is greater than a set threshold value, the controller does not start the electronic hand brake unit;
when the speed sensor detects that the speed of the vehicle is greater than a set threshold value and an electronic hand brake switch in the electronic hand brake unit is in an on state, the electronic hand brake valve is turned on through the controller, and the vehicle enters a parking state; when the electronic hand brake switch is closed, the electronic hand brake valve is closed through the controller.
Preferably, the vehicle travel control method further includes:
when the vehicle is in a parking state, the accelerator pedal is started, and the controller outputs a signal to close the electronic hand brake valve.
Compared with the prior art, the beneficial effects of the utility model are that:
the vehicle running control system and the vehicle running control method can enable the vehicle to use two front wheels to drive when running at high speed, have high running speed and are suitable for transition; when the vehicle runs at a low speed, four-wheel drive is used, so that the vehicle runs at a low speed, has high driving force and is suitable for operation.
The utility model discloses a vehicle driving control system and method, when the vehicle is in four-wheel drive condition, can launch the differential lock under the bad condition of road surface situation, prevent the tire because the adhesion difference with ground from appearing the phenomenon of skidding; the differential lock can be closed under the condition that the road surface is relatively flat, the oil temperature of a hydraulic system can be prevented from being overheated, the pressure loss is reduced, the walking driving efficiency is improved, and the tire abrasion phenomenon caused by the fact that the rotating speeds of the inner wheel and the outer wheel are inconsistent when the vehicle is steered due to a frame structure does not exist in any mode. The differential function can be started under the condition of bad road surface condition, so that the phenomenon of skidding of the tire due to different adhesive force with the ground is prevented; the differential function can be closed under the condition that the road surface is relatively flat, the oil temperature of the hydraulic system can be prevented from being overheated, the pressure loss is reduced, and the walking driving efficiency is improved.
Compared with the traditional mechanical hand brake which occupies the space of a central control area in the cab, the utility model discloses an electronic hand brake is adopted, only a small installation space is needed to meet the use requirement, the hand brake handle in the cab is cancelled, more positions are reserved for installing other control keys, and the purpose of saving partial space in the cab is achieved; and parking braking is changed into an electron manual brake switch button by original driver pulling the parking brake handle hard, has the advantage of one-key operation, and is simple laborsaving, avoids traditional manual brake to draw the emergence of not tight swift current car phenomenon, has increased the operating comfort and the convenience of driving the vehicle.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a central control area in a vehicle cab according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following description is made in detail for the application of the principles of the present invention with reference to the accompanying drawings.
Example 1
The embodiment of the utility model provides a vehicle control system that traveles, include:
the controller 1 is used for controlling the operation of each unit;
the display 2 is arranged in the cab, and is connected with the controller 1;
the high-low speed switching unit comprises a high-low speed switch 3 and a high-low speed switching valve 6, and the output end of the high-low speed switch 3 is connected with the controller 1; the high-low speed switching valve 6 is used for being installed on a main oil path connected with a hydraulic pump in a vehicle, the control end of the high-low speed switching valve is connected with the output end of the controller 1, and when the high-low speed switching valve 6 works, the displacement of the main oil path on the vehicle is increased or reduced; in practical application, the high-low speed change-over switch 3 is arranged below a steering wheel holding column in a vehicle cab;
a differential unit, which comprises a differential lock switch 5, a first differential valve 8, a second differential valve (not shown in the figure) and four speed sensors 9, wherein the output end of the differential lock switch 5 is connected with the controller 1, the control ends of the first differential valve 8 and the second differential valve are respectively connected with the output end of the controller, and the first differential valve 8 and the second differential valve are respectively used for being arranged on a first oil distribution path and a second oil distribution path which are communicated with a main oil path in the vehicle, the first oil distribution path supplies oil to one of two wheels at the front part of the vehicle, and the second oil distribution path supplies oil to one of two wheels at the rear part of the vehicle; the four speed sensors 9 are respectively used for being mounted on corresponding wheels on a vehicle, and the output ends of the four speed sensors 9 are respectively connected with the controller 1; during practical application, the differential lock switch 5 is arranged below a steering wheel holding column in a vehicle cab.
To sum up, the utility model discloses a vehicle control system that traveles can realize that vehicle (for example diesel road sweeper) high-low speed switches and differential mechanism locking, and concrete working process is:
starting a high-low speed change-over switch 3 in the high-low speed change-over unit, starting a high-low speed change-over valve 6 by the controller 1 according to a received change-over signal, enabling the vehicle to enter a low-speed four-wheel drive state from a high-speed front drive state, and using four-wheel drive when the vehicle travels at a low speed, wherein the traveling speed is low, the driving force is large, and the four-wheel drive is suitable for operation; or the vehicle is changed from a low-speed four-wheel drive state to a high-speed front-wheel drive state, and when the vehicle runs at a high speed, the vehicle is driven by two front wheels, so that the running speed is high, and the vehicle is suitable for transition; and realizing high and low speed switching function. In a specific implementation manner of the embodiment of the present invention, the high-speed forward driving state refers to that when the vehicle is in a high-speed state, the vehicle is driven by using two wheels in front of the vehicle; the low-speed four-wheel drive state means that when the vehicle is in a low-speed state, the vehicle is driven by four wheels of the vehicle; the high speed and the low speed are two relative speeds, for example, the low speed can be 10km/h maximum speed, the high speed can be 25km/h maximum speed, and the specific threshold value needs to be determined according to the vehicle type because the speed and the torque are in inverse proportion.
Under the vehicle is in the four wheel drive state, can launch the differential lock under the not good condition of road surface situation, prevent that the tire from because the phenomenon of skidding appears with the adhesive force difference on ground, specifically do: starting a differential lock switch 5 in a differential unit, starting a first differential valve 8 and a second differential valve by a controller 1 according to received differential signals, receiving speed signals output by four speed sensors 9 in real time, and controlling the first differential valve 8 and the second differential valve according to the received speed signals until the speed signals output by the four speed sensors 9 meet set requirements or receiving signals that the differential lock switch 5 is closed, and closing the first differential valve 8 and the second differential valve by the controller 1; the differential lock can be closed under the condition that the road surface is relatively flat, the oil temperature of a hydraulic system can be prevented from being overheated, the pressure loss is reduced, the walking driving efficiency is improved, and the function of the differential lock is realized.
Example 2
This example differs from example 1 in that: the vehicle running control system further comprises an electronic hand brake unit, the electronic hand brake unit comprises an electronic hand brake switch 4 and an electronic hand brake valve 7, the output end of the electronic hand brake switch 4 is connected with the controller 1, the electronic hand brake valve 7 is used for being installed on a main oil path connected with a hydraulic pump in a vehicle, the control end of the electronic hand brake valve is connected with the output end of the controller 1, and when the electronic hand brake valve 7 works, the main oil path on the vehicle is closed; during practical application, the electronic hand brake switch 4 is arranged below the steering wheel holding column in the vehicle cab.
Preferably, in a specific implementation manner of the embodiment of the present invention, in order to prevent the malfunction of the electronic manual brake switch 4, the vehicle driving control system further includes an accelerator pedal 10, the accelerator pedal 10 is configured to be installed in a cab of a vehicle, and an output end of the accelerator pedal is connected to an input end of the controller 1.
The rest of the process was the same as in example 1.
To sum up, the utility model discloses a vehicle control system that traveles can realize that vehicle (for example diesel road sweeper) high-low speed switches and differential mechanism locking, and concrete working process is:
starting a high-low speed change-over switch 3 in the high-low speed change-over unit, starting a high-low speed change-over valve 6 by the controller 1 according to a received change-over signal, enabling the vehicle to enter a low-speed four-wheel drive state from a high-speed front drive state, and using four-wheel drive when the vehicle travels at a low speed, wherein the traveling speed is low, the driving force is large, and the four-wheel drive is suitable for operation; or the vehicle is changed from a low-speed four-wheel drive state to a high-speed front-wheel drive state, and when the vehicle runs at a high speed, the vehicle is driven by two front wheels, so that the running speed is high, and the vehicle is suitable for transition;
under the vehicle is in the four wheel drive state, can launch the differential lock under the not good condition of road surface situation, prevent that the tire from because the phenomenon of skidding appears with the adhesive force difference on ground, specifically do: starting a differential lock switch 5 in a differential unit, starting a first differential valve 8 and a second differential valve by a controller 1 according to received differential signals, receiving speed signals output by four speed sensors 9 in real time, and controlling the first differential valve 8 and the second differential valve 11 according to the received speed signals until the speed signals output by the four speed sensors 9 meet set requirements or receiving signals that the differential lock switch 5 is closed, and closing the first differential valve 8 and the second differential valve 11 by the controller 1; the differential lock can be closed under the condition that the road surface is relatively flat, so that the oil temperature of a hydraulic system can be prevented from being overheated, the pressure loss is reduced, and the walking driving efficiency is improved;
the running speed V of the vehicle is monitored by a speed sensor 9 and transmitted to the controller 1 and the display 2.
When V is more than 5km/h, the electronic parking function is invalid, namely the controller does not start the electronic hand brake unit;
when V is less than or equal to 5km/h, and the electronic hand brake valve 7 is opened through the controller when the electronic hand brake switch 4 is opened, the vehicle enters a parking state, and the electronic hand brake valve 7 is closed through the controller 1 when the electronic hand brake switch 4 is closed.
In the parking state, when the accelerator pedal 10 is lightly touched and the electric signal of the accelerator pedal is input into the controller 1, the controller 1 outputs a signal to close the electronic hand brake valve 7, and the vehicle can walk without manually releasing the electronic parking.
Example 3
The embodiment of the utility model provides a vehicle control method that traveles, include:
starting a high-low speed change-over switch 3 in the high-low speed change-over unit, starting a high-low speed change-over valve 6 by the controller 1 according to a received change-over signal, and enabling the vehicle to enter a low-speed four-wheel drive state from a high-speed front drive state;
starting a differential lock switch 5 in a differential unit, starting a first differential valve 8 and a second differential valve by a controller 1 according to received differential signals, receiving speed signals output by four speed sensors 9 in real time, and controlling the first differential valve 8 and the second differential valve according to the received speed signals until the speed signals output by the four speed sensors 9 meet set requirements or receiving signals that the differential lock switch 5 is closed, and closing the first differential valve 8 and the second differential valve by the controller 1.
The vehicle travel control method in the present embodiment can be realized based on the vehicle travel control system in embodiment 1.
Example 4
The present embodiment differs from embodiment 3 in that the vehicle travel control method further includes:
when the high-low speed switch 3 in the high-low speed switching unit is turned off, the controller 1 turns off the high-low speed switching valve 6 according to the received signal, and the vehicle enters a two-front-wheel drive state.
Preferably, the vehicle travel control method further includes:
when the speed sensor 9 detects that the vehicle speed is greater than a set threshold value, the controller 1 does not start the electronic hand brake unit; the set threshold value can be 5 km/h;
when the speed sensor 9 detects that the speed of the vehicle is greater than a set threshold value and the electronic hand brake switch 4 in the electronic hand brake unit is in an on state, the electronic hand brake valve 7 is turned on through the controller 1, and the vehicle enters a parking state; when the electronic handbrake switch 4 is turned off, the electronic handbrake valve 7 is closed by the controller 1.
Preferably, the vehicle travel control method further includes:
when the vehicle is in a parking state, the accelerator pedal 10 is started, and the controller 1 outputs a signal to close the electronic hand brake valve 7.
The vehicle travel control method in the present embodiment can be realized based on the vehicle travel control system in embodiment 2.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A vehicle travel control system characterized by comprising:
a controller;
the high-low speed switching unit comprises a high-low speed switch and a high-low speed switching valve, and the output end of the high-low speed switch is connected with the controller; the high-low speed switching valve is used for being arranged on a main oil path connected with a hydraulic pump in a vehicle, and the control end of the high-low speed switching valve is connected with the output end of the controller;
the differential unit comprises a differential lock switch, a first differential valve, a second differential valve and four speed sensors, wherein the output end of the differential lock switch is connected with the controller, the control ends of the first differential valve and the second differential valve are respectively connected with the output end of the controller, the first differential valve and the second differential valve are respectively used for being installed on a first oil distribution path and a second oil distribution path which are communicated with a main oil path in a vehicle, the first oil distribution path supplies oil to one of two wheels at the front part of the vehicle, and the second oil distribution path supplies oil to one of two wheels at the rear part of the vehicle; the four speed sensors are respectively used for being installed on corresponding wheels on the vehicle, and the output ends of the four speed sensors are respectively connected with the controller.
2. A vehicle running control system according to claim 1, characterized in that: the vehicle control system that traveles still includes electron manual brake unit, electron manual brake unit includes electron manual brake switch and electron manual brake valve, the output of electron manual brake switch with the controller links to each other, the electron manual brake valve is arranged in installing in the vehicle on the total oil way that links to each other with the hydraulic pump, its control end with the output of controller links to each other.
3. A vehicle running control system according to claim 2, characterized in that: the vehicle running control system further comprises an accelerator pedal, the accelerator pedal is installed in a cab of the vehicle, and the output end of the accelerator pedal is connected with the input end of the controller.
4. A vehicle running control system according to claim 2, characterized in that: the high-low speed change-over switch, the differential lock switch and the electronic hand brake switch are all arranged below the column of the steering wheel of the cab.
5. A vehicle running control system according to claim 2, characterized in that: when the electronic hand brake valve works, a main oil way on the vehicle is closed; when the high-low speed switching valve works, the displacement of the total oil path on the vehicle becomes large or small.
6. A vehicle running control system according to claim 2, characterized in that: the vehicle running control system further comprises a display, and the display is arranged in the cab and connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920081655.4U CN209938318U (en) | 2019-01-18 | 2019-01-18 | Vehicle driving control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920081655.4U CN209938318U (en) | 2019-01-18 | 2019-01-18 | Vehicle driving control system |
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| CN209938318U true CN209938318U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733190A (en) * | 2019-01-18 | 2019-05-10 | 徐州徐工环境技术有限公司 | A kind of vehicle travel control system and method |
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2019
- 2019-01-18 CN CN201920081655.4U patent/CN209938318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733190A (en) * | 2019-01-18 | 2019-05-10 | 徐州徐工环境技术有限公司 | A kind of vehicle travel control system and method |
| CN109733190B (en) * | 2019-01-18 | 2024-06-14 | 徐州徐工环境技术有限公司 | Vehicle running control system and method |
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