阅读说明：本技术 发动机辅助制动控制系统及车辆 (Engine auxiliary braking control system and vehicle ) 是由 李康 刘亮 于 2021-11-15 设计创作，主要内容包括：本发明公开了一种发动机辅助制动控制系统,包括发动机控制器以及与发动机控制器电连接的发动机辅助制动功能按钮开关；当发动机控制器判断满足预先设置的辅助制动触发条件时,发动机控制器给出信号至电子节气门或喷油器,使电子节气门的开度或喷油器的喷油量达到第一设定值,迫使提升发动机转速至CVT无级变速装置处于动力结合状态的同时,发动机空转且不对外输出驱动扭矩,变速箱反拖发动机,实现发动机辅助制动。本发明的发动机辅助制动控制系统,可以非常简便和可靠地实现车辆发动机辅助制动、陡坡路段缓速行驶,在提高安全性的同时可降低对车辆制动系统的损耗。本发明还公开了一种车辆。(The invention discloses an engine auxiliary brake control system, which comprises an engine controller and an engine auxiliary brake function button switch electrically connected with the engine controller; when the engine controller judges that the preset auxiliary braking triggering condition is met, the engine controller gives a signal to the electronic throttle valve or the oil injector to enable the opening of the electronic throttle valve or the oil injection quantity of the oil injector to reach a first set value, the rotating speed of the engine is forced to be increased until the CVT is in a power combination state, the engine idles and does not output driving torque, and the gearbox reversely drags the engine to achieve auxiliary braking of the engine. The engine auxiliary brake control system can simply, conveniently and reliably realize the auxiliary brake of the vehicle engine and the slow speed running on a steep slope section, improve the safety and reduce the loss of the vehicle brake system. The invention also discloses a vehicle.)

1. The engine auxiliary brake control system comprises an engine controller, a whole vehicle brake switch, a whole vehicle speed sensor, a whole vehicle accelerator position sensor and an engine speed sensor, and is characterized in that: the engine auxiliary braking function button switch is electrically connected with the engine controller; when the engine controller judges that the preset auxiliary braking triggering condition is met, the engine controller gives a signal to the electronic throttle valve or the oil injector to enable the opening of the electronic throttle valve or the oil injection quantity of the oil injector to reach a first set value, the rotating speed of the engine is forced to be increased until the CVT is in a power combination state, the engine idles and does not output driving torque, and the gearbox reversely drags the engine to achieve auxiliary braking of the engine.

2. The engine auxiliary brake control system according to claim 1, characterized in that: the auxiliary braking triggering conditions comprise that a driver opens an engine auxiliary braking function button switch, the opening degree of an accelerator reaches a second set value, the rotating speed of the engine is lower than the combined rotating speed of the CVT stepless speed change device, the speed of the vehicle is higher than a third set value, and the driver performs braking action.

3. The engine auxiliary brake control system according to claim 1 or 2, characterized in that: and when the engine controller judges that a preset auxiliary brake quitting condition is met, quitting the auxiliary brake function of the engine.

4. The engine auxiliary brake control system according to claim 3, characterized in that: the auxiliary brake exit condition includes that the accelerator opening is greater than a fourth set value.

5. The engine auxiliary brake control system according to claim 3, characterized in that: the auxiliary brake exit condition includes vehicle speed being below a fifth set point.

6. The engine auxiliary brake control system according to claim 3, characterized in that: the auxiliary brake exit condition includes a driver turning off an engine auxiliary brake function push button switch.

7. A vehicle, characterized in that: including an engine assisted brake control system according to any one of claims 1 to 6.

8. The vehicle according to claim 7, characterized in that: the vehicle is an all-terrain vehicle or a scooter.

Technical Field

The invention belongs to the technical field of vehicle braking, and particularly relates to an engine auxiliary braking control system and a vehicle.

Background

At present, in the field of all-terrain vehicles (ATVs, UTVs) and pedal motorcycles, a power assembly generally adopts a structure of an engine, a CVT (usually a rubber belt type) and a transmission case, and the power structure is simple and reliable, for example, the structural schematic diagram of the CVT shown in fig. 3 and 4 is that a CVT driving wheel is connected with a crankshaft of the engine, a CVT driven wheel is connected with the transmission case, and power is transmitted from the engine to the transmission case through a CVT transmission belt and then is output to vehicle wheels to drive the vehicle to run.

In the CVT stepless speed change device, a centrifugal clutch mechanism is generally arranged on a CVT driving wheel or a CVT driven wheel, a vehicle driver can control a vehicle through an accelerator to realize acceleration and deceleration of the vehicle, when an engine is in an idle speed or the rotating speed is lower than a certain value, the CVT stepless speed change device is in a power separation state, and power transmission among the engine, a gearbox and the whole vehicle is interrupted; when the rotating speed of the engine is increased to a certain value, the CVT continuously variable transmission device is in a power combination state, and the engine transmits power to the gearbox through the CVT continuously variable transmission device so as to drive the vehicle to run.

When the vehicle brakes, the accelerator of the vehicle is generally in a zero position, that is, the driver of the vehicle does not trigger the accelerator, the rotating speed of the engine is in an idling state, the CVT stepless speed change box device is in a power separation state, the power transmission between the engine and the speed change box is interrupted, and the vehicle speed can be controlled only by the brake system of the vehicle.

In summary, the conventional all-terrain vehicles (ATV, UTV) and pedal motorcycles do not have an engine auxiliary braking function, and when the vehicle travels on a long downhill or steep slope, if the vehicle is braked for a long time, the safety is reduced and the loss of a braking system is increased.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an engine auxiliary brake control system, aiming at improving driving safety and reducing loss of a vehicle brake system.

In order to achieve the purpose, the invention adopts the technical scheme that: the engine auxiliary brake control system comprises an engine controller, a whole vehicle brake switch, a whole vehicle speed sensor, a whole vehicle accelerator position sensor, an engine rotating speed sensor and an engine auxiliary brake function button switch, wherein the whole vehicle brake switch, the whole vehicle speed sensor, the whole vehicle accelerator position sensor, the engine rotating speed sensor and the engine auxiliary brake function button switch are electrically connected with the engine controller; when the engine controller judges that the preset auxiliary braking triggering condition is met, the engine controller gives a signal to the electronic throttle valve or the oil injector to enable the opening of the electronic throttle valve or the oil injection quantity of the oil injector to reach a first set value, the rotating speed of the engine is forced to be increased until the CVT is in a power combination state, the engine idles and does not output driving torque, and the gearbox reversely drags the engine to achieve auxiliary braking of the engine.

The auxiliary braking triggering conditions comprise that a driver opens an engine auxiliary braking function button switch, the opening degree of an accelerator reaches a second set value, the rotating speed of the engine is lower than the combined rotating speed of the CVT stepless speed change device, the speed of the vehicle is higher than a third set value, and the driver performs braking action.

And when the engine controller judges that a preset auxiliary brake quitting condition is met, quitting the auxiliary brake function of the engine.

The auxiliary brake exit condition includes that the accelerator opening is greater than a fourth set value.

The auxiliary brake exit condition includes vehicle speed being below a fifth set point.

The auxiliary brake exit condition includes a driver turning off an engine auxiliary brake function push button switch.

The invention further provides a vehicle comprising the engine auxiliary braking control system.

The vehicle is an all-terrain vehicle or a scooter.

The engine auxiliary brake control system can simply, conveniently and reliably realize the auxiliary brake of the vehicle engine and the slow speed running on a steep slope section, improve the safety and reduce the loss of the vehicle brake system.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a block diagram of an engine auxiliary brake control system according to the present invention;

FIG. 2 is a flow chart of an engine auxiliary brake control system control strategy of the present invention;

fig. 3 is a front view of the CVT continuously variable transmission;

fig. 4 is a plan view of the CVT continuously variable transmission;

labeled as:

1. an engine controller; 2. a brake switch of the whole vehicle; 3. a vehicle speed sensor of the whole vehicle; 4. a vehicle accelerator position sensor; 5. an engine speed sensor; 6. an engine auxiliary brake function button switch; 7. an electronic throttle or fuel injector; 8. a CVT drive wheel; 9. a CVT belt; 10. the CVT driven wheel.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 and fig. 2, the invention provides an engine auxiliary brake control system, which comprises an engine controller, and a whole vehicle brake switch, a whole vehicle speed sensor, a whole vehicle accelerator position sensor, an engine speed sensor and an engine auxiliary brake function button switch which are electrically connected with the engine controller; when the engine controller judges that the preset auxiliary braking triggering condition is met, the engine controller gives a signal to an electronic throttle valve (for a gasoline engine) or an oil sprayer (for a diesel engine), so that the opening of the electronic throttle valve or the oil spraying quantity of the oil sprayer reaches a first set value, the rotating speed of the engine is forced to be increased until the CVT is in a power combination state, the engine idles and does not output driving torque, and the whole vehicle reversely drags the engine to realize the auxiliary braking of the engine.

Specifically, as shown in fig. 1 and 2, during the running of the vehicle, an Engine Controller (ECU) can monitor a vehicle braking signal, a vehicle speed signal, an engine speed signal, and a vehicle accelerator opening in real time through an engine harness. The auxiliary braking triggering conditions comprise that a driver opens an engine auxiliary braking function button switch, the opening degree of an accelerator reaches a second set value, the rotating speed of the engine is lower than the combined rotating speed of the CVT stepless speed change device, the vehicle speed is higher than a third set value, and the driver performs braking action. When the five conditions are all met, the auxiliary braking and the steep descent function of the engine are triggered, and the auxiliary braking of the engine is further realized.

In the invention, hardware such as an engine, a CVT (continuously variable transmission), a gearbox and the like does not need to be changed, only an engine auxiliary braking function button switch is needed to be added, the engine auxiliary downhill braking is realized through an electric control strategy, the hardware such as the engine, the CVT and the gearbox and the like does not need to be changed, only electric control software is changed, and the change is small and can be quickly realized.

When a vehicle driver turns on an engine auxiliary braking function switch and the vehicle runs on a steep slope (or downhill), the vehicle driver can completely release an accelerator (or the accelerator is smaller than a certain opening degree) according to driving habits and behavior logics, and perform braking action and trigger a braking signal, wherein the braking signal can be a switch signal (the driver does not need to keep braking all the time and trigger the braking signal all the time). Meanwhile, the engine controller monitors that the speed of the vehicle is higher than a certain value and the rotating speed of the engine is lower than the combined rotating speed of the CVT. When the five conditions are all met, the engine auxiliary braking and steep descent control functions are triggered, at the moment, the engine controller sends a signal to the electronic throttle valve or the oil injector to enable the opening of the electronic throttle valve or the oil injection quantity of the oil injector to be in a certain proper state, the engine rotates idly and does not output driving torque when the rotating speed of the engine is forced to be increased to a combined state of the CVT, and therefore the power connection between the engine and the gearbox is forced to be achieved, the vehicle drags the engine backwards through the gearbox, and the engine downhill auxiliary braking is achieved by means of the compression internal resistance of the engine.

When the vehicle runs on a flat road and is braked, if the engine controller judges that a preset auxiliary braking triggering condition is met, the auxiliary braking of the engine can be realized, and the purpose is to prevent the vehicle from sliding in a neutral gear (if the CVT continuously variable transmission is in a separated state, the condition is equal to the neutral gear of the vehicle) and ensure the driving safety.

When the vehicle runs on an uphill slope, five conditions of engine auxiliary braking on a downhill slope cannot be triggered according to driving habits and behavior logic, so that the working condition of the vehicle running on the uphill slope does not relate to the function.

And when the engine controller judges that the preset auxiliary brake quitting condition is met, quitting the auxiliary brake function of the engine. The auxiliary brake quitting condition is that the accelerator opening is larger than a fourth set value, the vehicle speed is lower than a fifth set value or the driver closes the auxiliary brake function button switch of the engine, and when an Engine Controller (ECU) monitors that the auxiliary brake function button switch of the engine is closed, the accelerator opening exceeds a certain value and the vehicle speed is lower than a certain limit value, namely any one condition of the three is met, the auxiliary brake function of the engine is quitted.

The specific process of quitting the auxiliary braking function of the engine comprises the following steps: firstly, according to driving habits and behavior logics, if the opening degree of an accelerator is larger than a certain value (a driver has the intention of accelerating or uniformly driving), the auxiliary braking function of the engine is quitted; secondly, if the vehicle speed is lower than a certain value (the safe vehicle speed for driving on a certain downhill can be calibrated and set according to the working condition of a long downhill or a steep slope), the auxiliary braking function of the engine is quitted; and finally, the auxiliary braking function of the engine can be quitted by closing the button switch of the auxiliary braking function of the engine.

The invention also provides a vehicle, which comprises the engine auxiliary braking control system with the structure. The vehicle of the invention includes the engine auxiliary brake control system in the above embodiment, so it has all the advantages of the engine auxiliary brake control system described above.

In this embodiment, the vehicle is an all-terrain vehicle or a scooter. The ATV may be an ATV or UTV.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.