阅读说明：本技术 一种发动机转速防干扰的装置及方法 (Device and method for preventing engine rotating speed from being interfered ) 是由 孙万超 王震华 张娟 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种发动机转速防干扰的装置及方法,涉及发动机领域,其中装置包括进气管,设在进气管上的控制阀,以及与进气管连通的清屑管,清屑管设在飞轮壳上并靠近转速传感器设置；控制阀由电控单元控制；其中方法通过获取清屑请求电信号,再判断清屑请求电信号是否为预设定清屑信号,若为预设定清屑信号,则控制阀开启,使气体经进气管进入清屑管,并从清屑管吹出,使飞轮和离合器摩擦盘上的碎屑被吹走,从而避免碎屑累积后,在飞轮和离合器摩擦盘分离时,被转速传感器吸附到自身,进而避免对转速信号产生干扰,使发动机寿命得到保证,并且本发明结构简单、易实现、成本低。(The invention discloses a device and a method for preventing the rotating speed of an engine from being interfered, which relate to the field of engines, wherein the device comprises an air inlet pipe, a control valve arranged on the air inlet pipe and a scrap cleaning pipe communicated with the air inlet pipe, wherein the scrap cleaning pipe is arranged on a flywheel shell and is close to a rotating speed sensor; the control valve is controlled by an electric control unit; the method comprises the steps of obtaining a chip cleaning request electric signal, judging whether the chip cleaning request electric signal is a preset chip cleaning signal or not, if the chip cleaning request electric signal is the preset chip cleaning signal, controlling the valve to be opened, enabling gas to enter the chip cleaning pipe through the gas inlet pipe and be blown out of the chip cleaning pipe, and enabling chips on the flywheel and the clutch friction disc to be blown away, so that the chips are prevented from being adsorbed to the flywheel and the clutch friction disc by the rotating speed sensor when the flywheel and the clutch friction disc are separated after being accumulated, interference on the rotating speed signal is avoided, and the service life of an engine is guaranteed.)

1. The device for preventing the rotating speed of the engine from being interfered is characterized by comprising an air inlet pipe, a control valve arranged on the air inlet pipe and a scrap cleaning pipe communicated with the air inlet pipe, wherein the scrap cleaning pipe is arranged on a flywheel shell and is close to a rotating speed sensor; the control valve is controlled by an electronic control unit.

2. The apparatus for preventing engine speed from interfering according to claim 1, wherein at least two of said dust-removing tubes are provided in said intake pipe, and all of said dust-removing tubes are provided on both sides of said speed sensor.

3. The engine speed interference prevention device according to claim 1, wherein an air inlet of the intake pipe is connected to an air outlet of the compressor.

4. The device for preventing the engine speed from interfering with the engine according to claim 1, further comprising a chip cleaning starting unit electrically connected with the electronic control unit, wherein the chip cleaning starting unit outputs a chip cleaning request electric signal to the electronic control unit according to the action times and/or the driving time of a clutch pedal, and the electronic control unit controls the control valve to open according to the chip cleaning request electric signal.

5. The engine speed anti-interference device according to any one of claims 1 to 4, characterized in that the device further comprises a debris removal request switch electrically connected to the electronic control unit.

6. A method of engine speed interference prevention, comprising the steps of:

acquiring a chip cleaning request electric signal;

judging whether the chip cleaning request electric signal is a preset chip cleaning signal or not;

if yes, generating a control signal;

controlling the control valve of any of claims 1 to 5 to open in response to a control signal, the scavenge tube blowing debris between the flywheel and the clutch friction disc.

7. The method of engine speed interference prevention according to claim 6, wherein said obtaining a debris removal request electrical signal comprises:

acquiring the action times of a clutch pedal;

judging whether the action times of the clutch pedal are preset times or not;

if yes, outputting a preset chip cleaning signal; and generating a clutch pedal action count zero clearing signal and a clutch release time timing signal.

8. The method of engine speed interference prevention according to claim 6, wherein said obtaining a debris removal request electrical signal comprises:

acquiring the running time of the vehicle;

judging whether the running time of the vehicle is a preset running time or not;

if yes, outputting a preset chip cleaning signal; and generating an operating time count clear signal and a clutch release time count signal.

9. The method of engine speed interference prevention according to claim 7 or 8, wherein the obtaining of the debris removal request electric signal includes:

acquiring clutch separation time;

judging whether the clutch separation time is preset separation time or not;

if yes, outputting a preset chip cleaning signal; and generating a clutch separation time timing zero clearing signal, a clutch pedal action count zero clearing signal and an operation time timing zero clearing signal.

10. The method of engine speed interference prevention according to claim 6, wherein said means of engine speed interference prevention comprises a debris removal switch electrically connected to said electronic control unit;

then the acquiring of the electronic chip cleaning request signal comprises the following steps:

judging whether the chip cleaning switch is actuated or not;

if so, outputting a preset chip cleaning signal.

Technical Field

The invention relates to the technical field of engines, in particular to a device and a method for preventing the rotating speed of an engine from being interfered.

Background

The rotating speed signal is an important input signal parameter for an engine controlled by an electronic control system, the electronic control engine needs to acquire the actual rotating speed of the engine from a rotating speed sensor, and the control system judges the compression top dead center of an engine cylinder according to the actual rotating speed of the engine and calculates the ignition angle and the jet crankshaft angle of the engine. The abnormal engine speed signal can cause the overlong starting time of the engine and the limitation of the torque output of the engine, thereby influencing the service life of the vehicle and threatening the driving safety of a driver.

At present, the rotating speed of an engine is mostly detected through a rotating speed sensor arranged on a flywheel shell, and if the rotating speed sensor is interfered, a rotating speed signal is abnormal. Most of the current rotating speed sensors are magnetoelectric sensors with magnetism. During the running process of a vehicle, the flywheel and the clutch friction disc rub against each other to generate some chips inevitably, the chips contain certain iron, when a driver steps on the clutch pedal, the clutch friction disc and the engine flywheel are separated, and the chips are adsorbed on the rotating speed sensor under the action of the magnetic force of the rotating speed sensor. When the debris is less, the rotating speed signal is not influenced. When debris accumulates to a certain extent, it will interfere with the speed signal at the instant that debris is attracted to the speed sensor. The failure of the engine to report the synchronous signal, the torque limitation of the engine and the severe condition can cause the engine to be flameout.

Disclosure of Invention

Aiming at the defects, the technical problems to be solved by the invention are as follows: the invention provides a device and a method for preventing the rotating speed of an engine from being interfered, which can remove the debris influencing the detection signal of a rotating speed sensor so as to obtain an accurate rotating speed signal.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a device for preventing the interference of the rotating speed of an engine comprises an air inlet pipe, a control valve arranged on the air inlet pipe and a scrap cleaning pipe communicated with the air inlet pipe, wherein the scrap cleaning pipe is arranged on a flywheel shell and is close to a rotating speed sensor; the control valve is controlled by an electronic control unit.

Preferably, the air inlet pipe is provided with at least two chip cleaning pipes, and all the chip cleaning pipes are respectively arranged on two sides of the rotating speed sensor.

Preferably, the air inlet of the air inlet pipe is connected with the air outlet of the air compressor.

Preferably, the scrap cleaning starting device further comprises a scrap cleaning starting unit electrically connected with the electronic control unit, the scrap cleaning starting unit outputs a scrap cleaning request electric signal to the electronic control unit according to the action times and/or the driving time of a clutch pedal, and the electronic control unit controls the control valve to be opened according to the scrap cleaning request electric signal.

Preferably, the device further comprises a scrap cleaning request switch electrically connected with the electronic control unit.

A method of engine speed interference prevention comprising the steps of:

acquiring a chip cleaning request electric signal;

judging whether the chip cleaning request electric signal is a preset chip cleaning signal or not;

if yes, generating a control signal;

and controlling the control valve to be opened according to the control signal, and blowing the debris between the flywheel and the clutch friction disc out of the debris cleaning pipe.

Preferably, the acquiring the electronic signal for requesting chip removal includes:

acquiring the action times of a clutch pedal;

judging whether the action times of the clutch pedal are preset times or not;

if yes, outputting a preset chip cleaning signal; and generating a clutch pedal action count zero clearing signal and a clutch release time timing signal.

Preferably, the acquiring the electronic signal for requesting chip removal includes:

acquiring the running time of the vehicle;

judging whether the running time of the vehicle is a preset running time or not;

if yes, outputting a preset chip cleaning signal; and generating an operating time count clear signal and a clutch release time count signal.

Preferably, the acquiring the electronic signal for requesting chip removal includes:

acquiring clutch separation time;

judging whether the clutch separation time is preset separation time or not;

if yes, outputting a preset chip cleaning signal; and generating a clutch separation time timing zero clearing signal, a clutch pedal action count zero clearing signal and an operation time timing zero clearing signal.

Preferably, the device for preventing the engine rotating speed from interfering comprises a scrap cleaning switch electrically connected with the electronic control unit;

then the acquiring of the electronic chip cleaning request signal comprises the following steps:

judging whether the chip cleaning switch is actuated or not;

if so, outputting a preset chip cleaning signal.

After the technical scheme is adopted, the invention has the beneficial effects that:

the device comprises an air inlet pipe, a control valve arranged on the air inlet pipe and a scrap cleaning pipe communicated with the air inlet pipe, wherein the scrap cleaning pipe is arranged on the flywheel shell and is close to the rotating speed sensor; the control valve is controlled by an electric control unit; the method comprises the steps of obtaining a chip cleaning request electric signal, judging whether the chip cleaning request electric signal is a preset chip cleaning signal or not, if the chip cleaning request electric signal is the preset chip cleaning signal, controlling the valve to be opened, enabling gas to enter the chip cleaning pipe through the gas inlet pipe and be blown out of the chip cleaning pipe, and enabling chips between the flywheel and the clutch friction disc to be blown away, so that the chips are prevented from being adsorbed to the flywheel and the clutch friction disc by the rotating speed sensor when the flywheel and the clutch friction disc are separated after being accumulated, interference on the rotating speed signal is avoided, and the service life of an engine is guaranteed.

Because the intake pipe is last to set up two at least clear bits pipe, all clear bits pipes are established respectively in speed sensor's both sides, promote and blow the piece effect.

Because the air inlet of the air inlet pipe is connected with the air outlet of the air compressor, the invention utilizes the compressed air provided by the vehicle to blow the scraps, reduces the cost and has reasonable structure and configuration and utilization.

The automatic cleaning device also comprises a chip cleaning starting unit which is electrically connected with the electric control unit, the chip cleaning starting unit outputs a chip cleaning request electric signal to the electric control unit according to the action times and/or the driving time of the clutch pedal, and the electric control unit controls the control valve to be opened according to the chip cleaning request electric signal; the chip cleaning action is automatically executed in a reasonable time.

Because still include the clear bits request switch of being connected with the electrical unit electricity, clear bits of accessible clear bits request switch initiative, make this device more practical.

Drawings

FIG. 1 is a schematic diagram of the engine speed anti-interference apparatus of the present invention;

FIG. 2 is a flow chart of a control method of the engine speed disturbance prevention apparatus of the present invention;

in the figure: 1-air inlet pipe, 2-scrap cleaning pipe, 4-control valve, 5-flywheel shell, 6-flywheel, 7-clutch friction disk and 8-rotating speed sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and 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.