CN207345800U - Control the system and gearbox of car ramp starting - Google Patents
Control the system and gearbox of car ramp starting Download PDFInfo
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- CN207345800U CN207345800U CN201721275689.4U CN201721275689U CN207345800U CN 207345800 U CN207345800 U CN 207345800U CN 201721275689 U CN201721275689 U CN 201721275689U CN 207345800 U CN207345800 U CN 207345800U
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Abstract
The utility model discloses a kind of system and gearbox for controlling car ramp starting.Wherein, which is manual transmission, wherein, manual transmission includes：Controller, for in the case where receiving end of braking signal, the brake pressure of control vehicle remains unchanged in the first pressurize duration, and in the case where the accelerator open degree of vehicle reaches default aperture, the brake pressure of vehicle is controlled to be remained unchanged in the second pressurize duration, then in the case where the second pressurize duration reaches preset duration, control vehicle exits braking, wherein, in the first pressurize duration, the brake pressure of vehicle remains unchanged；Switching device, is connected with controller, for preset duration to be adjusted based on vehicle operating parameters.The utility model solves the technical problem that the existing vehicle with manual transmission is cumbersome when carrying out uphill starting, security performance is low.
Description
Technical field
The utility model is related to automobile technical field, in particular to it is a kind of control car ramp starting system and
Gearbox.
Background technology
With science and technology continuous progress and the improvement of people's living standards, automobile become people it is daily and work
Essential trip instrument.Many families go on a journey all have purchased automobile for convenience, since the automobile of automatic gear-box has
There is the favor that easy to operate, handy advantage receives people, especially during uphill starting, become relative to manual
For the automobile of fast case, the automobile of automatic gear-box has advantage easy to operate.
But the price of automatic gear-box is costly, and current most commercial car (for example, light truck,
Tractor truck and car etc.), still using manual transmission, when commercial car is carrying out uphill starting, driver needs
Service brake, parking brake, clutch pedal and gas pedal are controlled at the same time, it is cumbersome, it also add the fatigue strength of driver's humidification.
For the less driver of driving experience, in some instances it may even be possible to the danger slipped by slope occur.
For the above-mentioned existing vehicle with manual transmission when carrying out uphill starting it is cumbersome, security performance is low
The problem of, effective solution is not yet proposed at present.
Utility model content
The utility model embodiment provides a kind of system and gearbox for controlling car ramp starting, existing at least to solve
Some has the technical problem that the vehicle of manual transmission is cumbersome when carrying out uphill starting, security performance is low.
According to the another aspect of the utility model embodiment, there is provided a kind of gearbox, the gearbox are manual transmission,
Wherein, manual transmission includes：Controller, in the case where receiving end of braking signal, controlling the braking pressure of vehicle
Power remains unchanged in the first pressurize duration, and in the case where the accelerator open degree of vehicle reaches default aperture, controls vehicle
Brake pressure remains unchanged in the second pressurize duration, then in the case where the second pressurize duration reaches preset duration, control
Vehicle exits braking, wherein, in the first pressurize duration, the brake pressure of vehicle remains unchanged；Switching device, connects with controller
Connect, for preset duration to be adjusted based on vehicle operating parameters.
Further, gearbox further includes：Speed reducing switch, is connected with controller, during holding for increasing brake pressure
Between；Acceleration switch, is connected with speed reducing switch, for reducing the retention time of brake pressure；Resetting Switching, is connected with controller,
For resetting the retention time of brake pressure；Turn off the switch, be connected with controller, for closing the uphill starting function of vehicle.
Further, gearbox further includes：Pressure sensor, is connected with controller, in the pipeline for detecting vehicle
Brake pressure；Solenoid valve, is connected with controller and pressure sensor, for carrying out pressurize processing to brake pressure.
Further, gearbox further includes：Parking handle, for controlling vehicle to complete parking braking；At least one braking
Device, is connected with parking handle to form parking circuit, for when parking handle reaches preset gear, control vehicle to complete parking
Braking.
Further, at least one brake is connected with solenoid valve to form driving circuit, for controlling vehicle to complete row
Car is braked.
Further, gearbox further includes：At least one gas receiver, is connected with parking handle, for storing vehicle braking
When required gas；Air compressor machine, is connected by pressure regulator valve with least one gas receiver, for being provided at least one gas receiver
For producing the air pressure of brake pressure；Pressure regulator valve, is connected between at least one gas receiver and air compressor machine, for controlling at least one
Air pressure in a gas receiver is maintained in the range of preset pressure.
Further, gearbox further includes：Brake pedal, is connected with pressure sensor, controller and solenoid valve, its
In, in the case where the aperture of brake pedal is less than predetermined threshold value, control vehicle braking.
Further, gearbox further includes：Gas pedal, is connected with controller, wherein, reach in the aperture of gas pedal
In the case of default aperture, vehicle exits braking.
Further, gearbox further includes：Engine, is connected with controller, for exporting dynamic torque to control vehicle
Exit braking.
According to the another aspect of the utility model embodiment, a kind of system for controlling car ramp starting, bag are additionally provided
Include above-mentioned gearbox.
In the utility model embodiment, by the way of manual transmission completes uphill starting, by controller in life
In the case of receiving signal into braking, control vehicle enters the first packing stage, enters the first packing stage, and vehicle in vehicle
Accelerator open degree reach default aperture in the case of, control vehicle enters the second packing stage, is up in definite second pressurize
In the case of preset duration, control vehicle exits braking, and the switching device being connected with controller can be based on vehicle operation ginseng
It is several that preset duration is adjusted, wherein, in the first packing stage, the brake pressure of vehicle is kept in the first pressurize duration
Constant, in the second packing stage, the brake pressure of vehicle remains unchanged in the second pressurize duration, and preset duration is based on car
The adjustable duration of operating parameter, has achieveed the purpose that the operation of the vehicle of simplified manual transmission, it is achieved thereby that improving tool
There is the technique effect of the security performance of the vehicle of manual transmission, and then solve the existing vehicle with manual transmission and exist
The technical problem cumbersome during progress uphill starting, security performance is low.
Brief description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and forms the part of the application,
The schematic description and description of the utility model is used to explain the utility model, does not form to the improper of the utility model
Limit.In the accompanying drawings：
Fig. 1 is the system structure diagram to be started to walk according to a kind of control car ramp of the utility model embodiment；
Fig. 2 is the structure diagram according to a kind of existing manual transmission of the utility model embodiment；And
Fig. 3 is the structure diagram according to a kind of preferable manual transmission of the utility model embodiment.
Embodiment
It is real below in conjunction with the utility model in order to make those skilled in the art more fully understand the utility model
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work, all should
When the scope for belonging to the utility model protection.
Embodiment 1
According to the utility model embodiment, a kind of embodiment of gearbox is additionally provided.
Fig. 1 is the structure diagram of gearbox according to embodiments of the present invention, as shown in Figure 1, the gearbox includes：Switch
Device 1001 and controller 1003.
Wherein, controller 1003, in the case where receiving end of braking signal, control vehicle to enter the first pressurize
Stage, and enter the first packing stage in vehicle, and in the case that the accelerator open degree of vehicle reaches default aperture, control vehicle into
Enter the second packing stage, then in the case where definite second pressurize duration reaches preset duration, control vehicle exits braking, its
In, in the first packing stage, the brake pressure of vehicle remains unchanged in the first pressurize duration, in the second packing stage,
The brake pressure of vehicle remains unchanged in the second pressurize duration, and preset duration is the adjustable duration based on vehicle operating parameters；
Switching device 1001, is connected with controller, for preset duration to be adjusted based on vehicle operating parameters.
It should be noted that the gearbox of the vehicle in the application is manual transmission, above-mentioned end of braking signal is used for
Instruction vehicle is over braking, for example, when driver's releasing of brake pedal, illustrates that vehicle is over braking.
In a kind of optional embodiment, pressure sensor is installed on the brake pedal of vehicle, the pressure sensor
It can detect that driver tramples the pressure value in brake pedal, and then determine that driver is to trample brake according to pressure value
Pedal, or in releasing of brake pedal.The pressure value collected is sent to car by the pressure sensor on brake pedal
Control system, according to the pressure value received, to judge to brake commencing signal, (i.e. driver tramples brake to vehicle control system
Caused signal during car pedal), or end of braking signal when driver's releasing of brake pedal (i.e. caused signal).Tool
Body, vehicle control system can be by reduced pressure force value and the size of a certain pressure threshold to determine whether generation end of braking
Signal.In the case where vehicle control system detects end of braking signal, i.e., vehicle control system detects that driver unclamps
During brake pedal, the solenoid valve of vehicle control system control vehicle is closed, so that the brake pressure in vehicle pipeline is kept
Constant, so far, vehicle enters the first packing stage.After vehicle enters the first packing stage, driver starts to trample oil
Door pedal, at this time, the dynamic torque of the pressure sensor detection engine in gas pedal, and the power that will be detected
Moment of torsion is sent to vehicle control system, and vehicle control system judges whether the dynamic torque reaches torsion threshold value, if engine
Dynamic torque reach torsion threshold value, then vehicle control system determines that the accelerator open degree of vehicle also reaches default aperture.So far,
One packing stage terminates, vehicle control system control vehicle enter the second packing stage, in the second packing stage, solenoid valve after
Continuous to close, the brake pressure in vehicle pipeline continues to remain unchanged.Meanwhile vehicle control system starts timing, vehicle is recorded
The second pressurize duration in the second packing stage.During vehicle carries out pressurize in the second packing stage, wagon control
System records pressurize duration of the vehicle in the second packing stage, and judges whether the second pressurize duration reaches preset duration,
If having reached preset duration, vehicle control system generation enabling signal, control solenoid valve is opened, the braking in vehicle pipeline
Pressure starts to diminish, and when brake pressure is reduced to predetermined threshold value, vehicle exits braking, and completes uphill starting.
It should be noted that in driver's releasing of brake pedal, the signal of end of braking, at this time, vehicle pipeline are generated
In brake pressure start to become larger, when the brake pressure in pipeline reaches pressure value set in advance, vehicle control system control
Solenoid valve processed is closed, after this, brake pressure in vehicle pipeline by maintain always solenoid valve close before brake pressure,
Until solenoid valve is opened.
In addition it is also necessary to explanation, the first pressurize duration reaches for the accelerator open degree of generation end of braking signal to vehicle
To the adjustable duration between default aperture, wherein, the qualification that the first pressurize duration drives vehicle with driver is related, i.e.,
Driver can drive the skilled situation of vehicle and the operating condition of vehicle according to itself voluntarily to adjust the first pressurize duration.Separately
Outside, above-mentioned preset duration is similarly adjustable duration, and the preset duration is associated with vehicle operating parameters.Specifically, vehicle
Operating parameter includes at least one of following：The time of load-carrying and the execution of parking the handle action of vehicle, wherein, parking handle is held
The time that action is made is after the second packing stage is entered, and parking handle completes the corresponding action of control instruction with receiving
Time.Wherein, when driver operates parking handle, parking handle receives control instruction, and performs opposite with control instruction
The action answered.In addition, the time of parking handle execution action is used to characterize the qualification that driver drives vehicle, for example,
Driver is new hand, and the operation to vehicle is unskilled, then the time of driver's operation parking handle is long, if driver couple
The operation of vehicle is more skilled, then the time of driver's operation parking handle is shorter.
From the foregoing, it will be observed that by controller in the case where generation brakes and receives signal, control vehicle enters the first pressurize rank
Section, enters the first packing stage in vehicle, and in the case that the accelerator open degree of vehicle reaches default aperture, and control vehicle is into the
Two packing stages, in the case where definite second pressurize duration reaches preset duration, control vehicle exits braking, and and controller
The switching device of connection can be adjusted preset duration based on vehicle operating parameters, wherein, in the first packing stage, vehicle
Brake pressure remained unchanged in the first pressurize duration, in the second packing stage, the brake pressure of vehicle is in the second pressurize
Remained unchanged in duration, preset duration is the adjustable duration based on vehicle operating parameters.
It is easily noted that, after the brake pressure in the pipeline to vehicle carries out pressurize, the system in vehicle pipeline
Pressure of taking offence will be always maintained at constant, and maintain in certain preset time period so that driver have abundance when
Between vehicle is completed to need the operation that carries out, also, in above process, vehicle is constantly in on-position, so as to effectively keep away
The existing vehicle with manual transmission is exempted from during uphill starting there is a phenomenon where car slipping, and then has improved driver and exist
Security during uphill starting.
Above-described embodiment of the application has achieveed the purpose that the operation of the vehicle of simplified manual transmission, it is achieved thereby that carrying
Height has the technique effect of the security performance of the vehicle of manual transmission, and then solves the existing car with manual transmission
The technical problem cumbersome when carrying out uphill starting, security performance is low.
In a kind of optional embodiment, above-mentioned preset duration is to continue after the aperture of gas pedal reaches a certain level
The time of pressurize.However, existing with the vehicle of manual transmission, preset duration is generally just set before vehicle release
It is good, and after setting, the personnel after sale of driver or vehicle cannot change the time, so as to can not meet to drive car
The different driver of qualification demand.Based on this, the application also adds on the basis of existing manual transmission
Acceleration switch, speed reducing switch, Resetting Switching, turn off the switch four buttons, completes the adjusting to the dwell time successively.Its
In, Fig. 2 is a kind of structure diagram of existing manual transmission, and as shown in Figure 2, existing manual transmission includes：Pneumatics
Machine or master cylinder 1, pressure regulator valve 2, gas receiver 3, brake pedal 4, brake 5, solenoid valve 6, parking handle 7, pressure sensor 8, control
Device (i.e. ECU) 9, gas pedal 10 and engine 11 processed.Wherein, air compressor machine or master cylinder 1 are used for the energy input of braking system；
Pressure regulator valve 2 is mainly used in pneumatic brake；Gas receiver 3 is mainly used in pneumatic brake.Add on the basis of existing manual transmission
Add FAST switch 12 (i.e. acceleration switches), SLOW switch 13 (i.e. speed reducing switch), RESET switch 14 (i.e. Resetting Switchings) and
OFF switch 15 (turning off the switch) can obtain the manual transmission that the application as shown in Figure 3 is proposed.Wherein, FAST is opened
Close 12 to be used to reduce the dwell time, SLOW switches 13 are used to increase the dwell time, and RESET switches 14 are used to carry out the dwell time
Reset, OFF switch 15 is used to close hill start function.
In addition it is also necessary to illustrate, the implication of the implication label identical with Fig. 2 of each label in Fig. 3 is identical,
This is repeated no more.
In a kind of preferred embodiment, the structure diagram of manual transmission as shown in Figure 3.From the figure 3, it may be seen that manually
Switching device in gearbox further includes：Speed reducing switch 13, acceleration switch 12, Resetting Switching 14 and turn off the switch 15.Switch
Device is connected with controller 9, driver by the switch in installation switching device can by control signal transmission into controller 9,
And then controller 9 completes corresponding operation according to control signal, for example, adjusting the dwell time, turning off or on the ramp of vehicle
Start to walk function.Wherein, speed reducing switch 13, are connected with controller 9, for increasing the retention time of brake pressure；Acceleration switch 12,
It is connected with speed reducing switch 13, for reducing the retention time of brake pressure；Resetting Switching 14, is connected with controller 9, for resetting
The retention time of brake pressure；15 are turned off the switch, is connected with controller 9, for closing the uphill starting function of vehicle.
Specifically, if driver is new hand, or vehicle heavy duty climbing, the then dwell time that driver needs compare
Long, at this time, driver can increase the dwell time by operating speed reducing switch 13, and driver often presses a speed reducing switch 13,
Dwell time increases by 0.5 second, until the driver certifying dwell time is the rational dwell time.Wherein, the maximum of dwell time
Value is no more than 5 seconds.If operation of the driver to vehicle is more skilled, either vehicle is in the state or vehicle of unloaded climbing
State in descending operation, the dwell time that driver needs is shorter, and at this time, driver can be by operating acceleration switch 12
To reduce the dwell time.Driver often presses an acceleration switch 12, and the dwell time reduces 0.5 second, until driver certifying is protected
The pressure time is the rational dwell time.Wherein, the minimum value of dwell time is 0 second.If driver can not determine to rise in ramp
Required dwell time during step, driver can reset the dwell time by pressing Resetting Switching 14,
The dwell time given tacit consent to when dwell time is arranged to vehicle release.And after driver's operation turns off the switch 15, vehicle will
Close hill start function.
It should be noted that driver, when operating speed reducing switch 13 or acceleration switch 12, controller 9 is with certain adjusting
The dwell time is adjusted in increment, wherein, increment of adjustment can be set according to actual conditions, alternatively, in vehicle release
It is set as default value.
In a kind of optional embodiment, as shown in figure 3, manual transmission further includes：Pressure sensor 8 and solenoid valve 6.
Wherein, pressure sensor 8, are connected with controller 9, the brake pressure in pipeline for detecting vehicle；Solenoid valve 6, with control
Device 9 and pressure sensor 8 connect, for carrying out pressurize processing to brake pressure.
It should be noted that solenoid valve 6 can be but be not limited to pressurize solenoid valve.Due in the car with manual transmission
Pressure sensor and solenoid valve are mounted with, in the case where solenoid valve 6 carries out pressurize to brake pressure, pressure sensor 8
The brake pressure detected is sent to controller 9, is handled accordingly by controller 9, therefore, can be efficiently solved existing
Some manual transmission vehicle carry out uphill starting when, driver need at the same time control service brake, parking brake, clutch pedal and
Gas pedal etc., it is cumbersome the problem of, and then can achieve the purpose that simplified driver operation.
In an alternative embodiment, as shown in figure 3, manual transmission further includes：Air compressor machine 1, pressure regulator valve 2, extremely
Few a gas receiver 3, brake pedal 4, at least one brake 5, parking handle 7, gas pedal 10 and engine 11.
Wherein, air compressor machine 1, is connected by pressure regulator valve 2 with least one gas receiver 3, for being carried at least one gas receiver 3
For the air pressure for producing brake pressure；Pressure regulator valve 2, is connected between at least one gas receiver 3 and air compressor machine 1, for controlling
Air pressure at least one gas receiver 3 is maintained in the range of preset pressure；At least one gas receiver 3, is connected with parking handle 7,
Required gas during for storing vehicle braking；Brake pedal 4, connects with pressure sensor 8, controller 9 and solenoid valve 6
Connect, wherein, in the case where the aperture of brake pedal 4 is less than predetermined threshold value, control vehicle braking；At least one brake 5, with
Parking handle 7 is connected to form parking circuit, for when parking handle 7 reaches preset gear, control vehicle to complete parking system
It is dynamic；It is connected with solenoid valve 6 to form driving circuit, for controlling vehicle to complete service brake；Parking handle 7, for controlling car
Complete parking braking；Gas pedal 10, is connected with controller 9, wherein, reach default aperture in the aperture of gas pedal 10
In the case of, vehicle exits braking；Engine 11, is connected with controller 9, for exporting dynamic torque to control vehicle to exit system
It is dynamic.
It should be noted that in circuit of driving a vehicle, the function of brake is service brake；In parking circuit, brake
Function be parking braking.Wherein, during vehicle travels, driver is generally controlled using service brake (i.e. service brake)
Vehicle deceleration or parking；After vehicle comes to a complete stop, driver generally uses parking braking (i.e. parking brake) to prevent vehicle forward slip
Slipped after or.
In addition it is also necessary to explanation, at least one brake are connected by quick release valve with parking handle, wherein, fast
Put in the case that valve is in opening, the gas in vehicle pipeline can be excluded.Gas receiver passes through four-loop protection valve and parking
Handle and the connection of other gas receivers, to adjust the air pressure in vehicle pipeline.
Embodiment 2
According to the another aspect of the embodiment of the present application, a kind of system for controlling car ramp starting, including reality are additionally provided
Apply the gearbox provided in example 1.
It should be noted that by the manual transmission in embodiment 1 be applied to control commercial car (i.e. for conveying people and
The vehicle of cargo, for example, car, lorry, tractor truck etc.) uphill starting system in, not only can effectively reduce incite somebody to action from
Dynamic gearbox is applied in commercial car increase commercial car cost, can also reduce driver operation manual transmission vehicle into
Operating procedure during row uphill starting, improves the security that driver drives vehicle.
Above-mentioned the utility model embodiment sequence number is for illustration only, does not represent the quality of embodiment.
In above-described embodiment of the utility model, the description to each embodiment all emphasizes particularly on different fields, in some embodiment
The part not being described in detail, may refer to the associated description of other embodiment.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of gearbox, it is characterised in that gearbox is manual transmission, and the manual transmission includes：
Controller, in the case where receiving end of braking signal, controlling the brake pressure of vehicle in the first pressurize duration
Inside remain unchanged, and in the case where the accelerator open degree of the vehicle reaches default aperture, control the brake pressure of the vehicle
Remained unchanged in the second pressurize duration, then in the case where the second pressurize duration reaches preset duration, described in control
Vehicle exits braking, wherein, in the first pressurize duration, the brake pressure of the vehicle remains unchanged；
Switching device, is connected with the controller, for the preset duration to be adjusted based on vehicle operating parameters.
2. gearbox according to claim 1, it is characterised in that the switching device includes：
Speed reducing switch, is connected with the controller, for increasing the retention time of the brake pressure；
Acceleration switch, is connected with the speed reducing switch, for reducing the retention time of the brake pressure；
Resetting Switching, is connected with the controller, for resetting the retention time of the brake pressure；
Turn off the switch, be connected with the controller, for closing the uphill starting function of the vehicle.
3. gearbox according to claim 1, it is characterised in that the manual transmission further includes：
Pressure sensor, is connected with the controller, the brake pressure in pipeline for detecting the vehicle；
Solenoid valve, is connected with the controller and the pressure sensor, for carrying out pressurize processing to the brake pressure.
4. gearbox according to claim 3, it is characterised in that the manual transmission further includes：
Parking handle, for controlling the vehicle to complete parking braking；
At least one brake, is connected to form parking circuit with the parking handle, for reaching pre- in the parking handle
If during gear, the vehicle is controlled to complete parking braking.
5. gearbox according to claim 4, it is characterised in that at least one brake is connected with the solenoid valve
To form driving circuit, for controlling the vehicle to complete service brake.
6. gearbox according to claim 5, it is characterised in that the manual transmission further includes：
At least one gas receiver, is connected with the parking handle, for storing required gas when the vehicle is braked；
Air compressor machine, is connected by pressure regulator valve with least one gas receiver, for providing use at least one gas receiver
In the air pressure for producing the brake pressure；
Pressure regulator valve, is connected between at least one gas receiver and the air compressor machine, for controlling at least one gas storage
Air pressure in cylinder is maintained in the range of preset pressure.
7. gearbox according to claim 6, it is characterised in that the manual transmission further includes：
Brake pedal, is connected with the pressure sensor, the controller and the solenoid valve, wherein, stepped in the braking
In the case that the aperture of plate is less than predetermined threshold value, the vehicle is controlled to brake.
8. gearbox according to claim 7, it is characterised in that the manual transmission further includes：
Gas pedal, is connected with the controller, wherein, reach the situation of the default aperture in the aperture of the gas pedal
Under, the vehicle exits braking.
9. gearbox according to claim 8, it is characterised in that the manual transmission further includes：
Engine, is connected with the controller, for exporting dynamic torque to control the vehicle to exit braking.
10. a kind of system for controlling car ramp starting, it is characterised in that including the change described in claim 1 to 9 any one
Fast case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275689.4U CN207345800U (en) | 2017-09-29 | 2017-09-29 | Control the system and gearbox of car ramp starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275689.4U CN207345800U (en) | 2017-09-29 | 2017-09-29 | Control the system and gearbox of car ramp starting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207345800U true CN207345800U (en) | 2018-05-11 |
Family
ID=62357146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721275689.4U Active CN207345800U (en) | 2017-09-29 | 2017-09-29 | Control the system and gearbox of car ramp starting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207345800U (en) |
-
2017
- 2017-09-29 CN CN201721275689.4U patent/CN207345800U/en active Active
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