CN110700942A - Device and method for preventing engine rotating speed from being interfered - Google Patents
Device and method for preventing engine rotating speed from being interfered Download PDFInfo
- Publication number
- CN110700942A CN110700942A CN201911008880.6A CN201911008880A CN110700942A CN 110700942 A CN110700942 A CN 110700942A CN 201911008880 A CN201911008880 A CN 201911008880A CN 110700942 A CN110700942 A CN 110700942A
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- signal
- chip cleaning
- preset
- rotating speed
- clutch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
- F02B2077/045—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines by flushing or rinsing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
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.
Description
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.
The first embodiment is as follows:
as shown in fig. 1, the device for preventing the rotating speed of the engine from being interfered comprises an air inlet pipe 1, a control valve 4 arranged on the air inlet pipe 1, and a chip cleaning pipe 2 communicated with the air inlet pipe 1, wherein the chip cleaning pipe 2 is arranged on a flywheel housing 5 and is close to a rotating speed sensor 8; the control valve 4 is controlled by an electronic control unit. When the vehicle needs to clear the bits, the electronic control unit control valve 4 is opened, makes intake pipe 1 open, and gas can get into in the clear bits pipe 2 through intake pipe 1, finally blows out from clear bits pipe 2. Because the scrap cleaning pipe 2 is arranged close to the rotating speed sensor 8, the scraps between the flywheel 6 and the clutch friction disc 7 can be blown away by the blown gas, so that when the flywheel 6 and the clutch friction disc 7 are prevented from being separated, the scraps are adsorbed on the rotating speed sensor 8 under the action of magnetic force, the rotating speed signal is prevented from being interfered, the electric control unit obtains an accurate rotating speed signal, the control is carried out according to the accurate rotating speed signal, and the service life of the engine is not influenced. Moreover, the device for preventing the rotating speed of the engine from being interfered has the advantages of simple structure, easy realization and low cost. Particularly, when the air inlet of the air inlet pipe 1 is connected with the air outlet of the original air compressor on the vehicle, the original structural configuration of the vehicle is utilized, so that the structure is reasonably utilized, and the cost is further reduced.
The device also comprises a chip cleaning starting unit electrically connected with the electric control unit, wherein 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 4 to be opened according to the chip cleaning request electric signal. The chip cleaning starting unit enables chip cleaning to be automatically carried out, when the action frequency of the clutch pedal reaches a certain frequency, the chip generated by friction between the clutch friction disc 7 and the flywheel 6 is accumulated to a certain amount, the probability that the chip is magnetically adsorbed by the rotating speed sensor 8 is high, therefore, after the clutch pedal acts for a certain frequency, the control valve 4 is opened through the electric control unit to blow the chip, and the chip can be effectively prevented from interfering the rotating speed signal. Similarly, after the vehicle runs for a certain time, the chips can also accumulate to a certain amount, the control valve 4 is opened to blow the chips, and the chips can be prevented from interfering the rotating speed signal.
The scrap cleaning starting unit comprises a comparator, a counter and a timer, wherein the counter and the timer are respectively electrically connected with the comparator, the counter is used for accumulating the action times of the clutch pedal, the timer is used for timing the running time of the vehicle, the comparator compares the accumulated times of the counter with the preset times, and the accumulated time of the counter is compared with the preset running time. When the frequency is preset frequency or the running time is preset running time, the comparator transmits a chip cleaning request electric signal to the electric control unit and clears the counter or the timer. Of course, the chip cleaning starting unit is not limited to the above-listed structures, such as: the comparator, counter and timer may be integrated in the electronic control unit.
This device still includes the clear bits request switch of being connected with the electrical unit electricity, can realize the clear bits of initiative through this clear bits request switch, and the driver can be according to actual conditions through clear bits request switch initiative clear bits, has fully guaranteed the clearance effect, extension vehicle life makes this device more practical. In this embodiment, the chip cleaning switch may be an automatic reset switch or a non-automatic reset switch. After the control valve 4 is opened for a period of time after the automatic reset switch is not operated, a driver manually presses the chip cleaning switch to reset the chip cleaning switch, and at the moment, the electric control voltage enters the automatic chip cleaning mode again.
As shown in fig. 1, in the present embodiment, at least two dust-cleaning pipes 2 are arranged on the air inlet pipe 1, in the present embodiment, two dust-cleaning pipes 2 are arranged, all the dust-cleaning pipes 2 are respectively arranged at two sides of the rotation speed sensor 8, and the wind force blown by the two dust-cleaning pipes 2 is relatively large, so that the dust between the flywheel 6 and the clutch friction disc 7 can be completely removed.
In addition, in the present embodiment, the air outlet of each of the dust-removing pipes 2 is disposed opposite to the flywheel 6 and the clutch friction disc 7, and the dust-removing effect is good at this time, but the arrangement mode is not limited thereto.
Example two:
as shown in fig. 2, a method for preventing engine rotation speed from being disturbed includes the following steps:
step S1, acquiring a scrap clearing request electric signal;
step S2, judging whether the scrap cleaning request electric signal is a preset scrap cleaning signal or not;
step S3, if yes, generating a control signal;
and step S4, controlling the control valve to open according to the control signal, and blowing the scraps between the air blowing flywheel and the clutch friction disc by the scrap cleaning pipe.
After the method is adopted, the chips accumulated between the flywheel and the clutch friction disc can be automatically removed, so that the chips are prevented from being adsorbed by the rotating speed sensor, the rotating speed signal detected by the rotating speed sensor is further prevented, and the electric control unit controls the vehicle to run according to the accurate rotating speed signal; the method is simple, easy to operate and low in cost.
In this embodiment: the acquiring of the electronic signal for requesting chip removal of step S1 includes:
acquiring the action times of a clutch pedal;
judging whether the action frequency of the clutch pedal is a preset frequency or not, wherein the frequency can be set according to the actual condition;
if yes, outputting a preset chip cleaning signal; generating a clutch pedal action count zero clearing signal and clutch separation time timing; if not, the number of the actions of the clutch pedal is continuously acquired.
In this embodiment, the acquiring the chip cleaning request electrical signal in step S1 includes:
acquiring the running time of the vehicle;
judging whether the running time of the vehicle is preset running time or not, wherein the running time can be set in real time according to actual conditions;
if yes, outputting a preset chip cleaning signal; generating an operating time timing zero clearing signal and a clutch separation time timing; if not, the vehicle running time is continuously acquired.
In this embodiment, the acquiring the chip cleaning request electrical signal in step S1 includes:
acquiring clutch separation time;
judging whether the clutch separation time is preset separation time or not, wherein the separation time can be set according to the actual situation;
if yes, outputting a preset chip cleaning signal; 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; if not, the clutch disengagement time continues to be acquired.
In this embodiment, the device for preventing the engine rotation speed from interfering comprises a scrap cleaning switch electrically connected with the electronic control unit;
the acquiring of the electronic clear request signal of step S1 includes:
judging whether the chip cleaning switch is actuated or not;
if the action is performed, outputting a preset chip cleaning signal; the chip cleaning switch in the embodiment can be an automatic reset switch or a non-automatic reset switch, when the chip cleaning switch is a non-automatic reset switch, a driver manually presses the chip cleaning switch after the control valve is opened for a period of time, so that the chip cleaning switch is reset, and at the moment, the electric control voltage enters the automatic chip cleaning mode again.
In the method for preventing the engine rotating speed from being interfered, the electronic control unit obtains the times of the action of the clutch pedal through the clutch switch, and the electronic control unit obtains the running time of the vehicle by utilizing the self timing function; when the action times of the clutch pedal reach the preset times or the running time of the vehicle reaches the preset running time, when the clutch pedal acts again, the action times of the clutch pedal and the running time of the vehicle continue to be accumulated, meanwhile, the clutch separation time is accumulated from zero, the electronic control unit outputs a scrap cleaning control signal, the control valve is opened according to the control signal, compressed air enters the air inlet pipe, finally, cleaning scraps are blown out from the scrap cleaning pipe, and the scraps between the flywheel and the clutch friction disc are blown out.
Before the clutch separation time reaches the preset separation time, accumulating the action times of a clutch pedal, the vehicle running time and the clutch separation time on the basis of the last time of each clutch action, and simultaneously opening a control valve to enable compressed air to blow debris; and after the clutch separation time reaches the preset separation time, clearing the times of the actions of the clutch pedal, the clutch separation time and the vehicle running time, and repeatedly acquiring a chip cleaning request signal.
For a vehicle provided with a chip cleaning request switch, after a driver turns on the chip cleaning request switch, the electronic control unit receives a chip cleaning request switch action signal, outputs a chip cleaning control signal, and controls the valve to be opened according to the control signal to execute a chip cleaning action. After the driver closes the chip cleaning request switch, the electronic control unit closes the control valve, clears the action frequency of the clutch pedal, the clutch separation time and the vehicle running time, and repeatedly acquires a chip cleaning request signal. Therefore, the method disclosed by the invention is simple to operate, easy to implement and low in cost.
The above-described preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent to the improvement of the device and method for preventing engine speed from interfering, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008880.6A CN110700942B (en) | 2019-10-22 | 2019-10-22 | Device and method for preventing engine rotating speed from being interfered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008880.6A CN110700942B (en) | 2019-10-22 | 2019-10-22 | Device and method for preventing engine rotating speed from being interfered |
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| Publication Number | Publication Date |
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| CN110700942A true CN110700942A (en) | 2020-01-17 |
| CN110700942B CN110700942B (en) | 2020-06-30 |
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| CN201911008880.6A Active CN110700942B (en) | 2019-10-22 | 2019-10-22 | Device and method for preventing engine rotating speed from being interfered |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000249033A (en) * | 1999-02-26 | 2000-09-12 | Mitsubishi Motors Corp | Flywheel cleaning device |
| CN2881283Y (en) * | 2005-12-21 | 2007-03-21 | 广西玉柴机器股份有限公司 | Fly wheel shell |
| US7370623B1 (en) * | 2006-12-11 | 2008-05-13 | Husqvarna Outdoor Products Inc. | Engine-powered tool with a tube for guiding a starter pull rope |
| CN103008288A (en) * | 2012-12-26 | 2013-04-03 | 湖南省三联环保科技有限公司 | Multi-spray-nozzle air-pressure pulse chip clearing system for piston chip clearing and control method |
| JP2016183604A (en) * | 2015-03-26 | 2016-10-20 | いすゞ自動車株式会社 | Blow-by gas discharge structure |
| CN110102838A (en) * | 2019-05-18 | 2019-08-09 | 玉柴联合动力股份有限公司 | Tapping iron filings blow device on a kind of engine cylinder cover production line |
-
2019
- 2019-10-22 CN CN201911008880.6A patent/CN110700942B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000249033A (en) * | 1999-02-26 | 2000-09-12 | Mitsubishi Motors Corp | Flywheel cleaning device |
| CN2881283Y (en) * | 2005-12-21 | 2007-03-21 | 广西玉柴机器股份有限公司 | Fly wheel shell |
| US7370623B1 (en) * | 2006-12-11 | 2008-05-13 | Husqvarna Outdoor Products Inc. | Engine-powered tool with a tube for guiding a starter pull rope |
| CN103008288A (en) * | 2012-12-26 | 2013-04-03 | 湖南省三联环保科技有限公司 | Multi-spray-nozzle air-pressure pulse chip clearing system for piston chip clearing and control method |
| JP2016183604A (en) * | 2015-03-26 | 2016-10-20 | いすゞ自動車株式会社 | Blow-by gas discharge structure |
| CN110102838A (en) * | 2019-05-18 | 2019-08-09 | 玉柴联合动力股份有限公司 | Tapping iron filings blow device on a kind of engine cylinder cover production line |
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|---|---|
| CN110700942B (en) | 2020-06-30 |
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