CN115163314A - Single-cylinder carburetor type engine flameout and fuel cut-off control device and control method thereof - Google Patents
Single-cylinder carburetor type engine flameout and fuel cut-off control device and control method thereof Download PDFInfo
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- CN115163314A CN115163314A CN202210846673.3A CN202210846673A CN115163314A CN 115163314 A CN115163314 A CN 115163314A CN 202210846673 A CN202210846673 A CN 202210846673A CN 115163314 A CN115163314 A CN 115163314A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a single-cylinder carburetor type engine flameout and fuel-cut control device and a control method thereof, and the single-cylinder carburetor type engine flameout and fuel-cut control device comprises an air supplementing assembly, a flameout switch (1), an idle speed contact switch (2), an engine rotating speed sensor (6), a driving wheel speed sensor (7), a gear switch (8) and a control unit (3), wherein the air supplementing assembly comprises an air supplementing electromagnetic valve (5), and the control unit (3) is respectively connected with the air supplementing electromagnetic valve (5), the flameout switch (1), the idle speed contact switch (2), the engine rotating speed sensor (6), the driving wheel speed sensor (7) and the gear switch (8) through a first signal wire, a second signal wire, a third signal wire, a fourth signal wire, a fifth signal wire and a sixth signal wire. Compared with the prior art, the invention has the beneficial effects that: the installation is convenient, energy-conserving safety, effectively prevents that the high vacuum degree effect of throat department from spouting into the throat under the indoor fuel of carburetor float after the engine idling or flame-out, saves fuel consumption by a wide margin.
Description
The application is a divisional application of an invention patent with the parent name of 'single cylinder carburetor type engine flameout and fuel cut-off control device and control method thereof'; the parent application has the application number: CN201710391979.3; the application date of the parent application is as follows: 2017-05-27.
Technical Field
The invention relates to the technical field of engine flameout and fuel cut-off control devices and control methods thereof, in particular to a single-cylinder carburetor type engine flameout and fuel cut-off control device and a control method thereof.
Background
Generally, when an engine throttle valve is suddenly closed (flameout or forced idling), due to the fact that the vacuum degree of an air inlet manifold is increased instantly, airflow pressure at a throat and an idle nozzle of a carburetor is reduced, fuel in a float chamber of the carburetor is sprayed out of the idle nozzle and a main nozzle under the action of vacuum and enters a cylinder, and obviously, the fuel with extremely high concentration cannot be completely combusted, and therefore fuel waste is caused. Improvements are therefore needed.
The Chinese invention patent with the patent number ZL200710075108.7 discloses a whole set of latest electric control air supply system device aiming at the European emission standard III or above of a motor vehicle, in particular a motorcycle, which mainly comprises an Electronic Controller (ECU), a primary air supply electromagnetic valve (high-frequency airflow control valve) and a secondary air supply electromagnetic valve (airflow control valve), a catalytic converter, an air filter, related sensing parts, communicating pipelines, connecting wiring harnesses and the like. An Electronic Control Unit (ECU) timely sends on-off control instructions to a primary air supplement solenoid valve and a secondary air supplement solenoid valve of a system device according to the running change of the engine, namely primary air supplement and secondary air supplement are carried out, so that the air-fuel ratio of the engine is effectively improved, and the emission of harmful gases is reduced. In addition, the structure and the connection mode of the interior of the electromagnetic valve are continuously improved and optimized, the reliability of the system device is further improved, the cost is reduced, and the electromagnetic valve is suitable for large-scale production. However, the electronic controller of the invention is not provided with a control device for a flameout switch, an idle contact switch, an engine rotating speed, a driving wheel speed and a gear switch, and cannot realize that the carburetor engine controls the engine to flameout and cut off fuel in time when an engine throttle is suddenly closed, so the electronic controller still has the following technical defects: at the moment, the vacuum degree of the instant air inlet manifold is increased, so that the airflow pressure at the throat and the idle speed nozzle of the carburetor is reduced, fuel in the float chamber of the carburetor is sprayed out from the idle speed nozzle and the main nozzle under the vacuum action and enters the cylinder, and the extremely-concentrated fuel cannot be completely combusted, so that the fuel is wasted.
Therefore, there is a need in the market for a single cylinder carburetor type engine flameout and fuel-cut control device and a control method thereof, which are used for solving the above problems.
Disclosure of Invention
The invention aims to provide a flameout and fuel-cut control device of a single-cylinder carburetor engine and a control method thereof, which are used for solving the technical problems in the prior art, and are used for sensing the running state through a plurality of sensors and controlling an air supply component to run.
In order to achieve the purpose, the invention provides the following scheme:
the single-cylinder carburetor type engine flameout and fuel-cut-off control device comprises an air supply assembly, a flameout switch, an idling contact switch, an engine rotating speed sensor, a driving wheel speed sensor, a gear switch and a control unit, wherein the air supply assembly comprises an air supply electromagnetic valve, and the control unit is connected with the air supply electromagnetic valve, the flameout switch, the idling contact switch, the engine rotating speed sensor, the driving wheel speed sensor and the gear switch through a first signal line, a second signal line, a third signal line, a fourth signal line, a fifth signal line and a sixth signal line respectively.
Preferably, the air supplement component comprises an air filter, an air inlet three-way pipe, an engine, a carburetor and an air supply hose.
In any of the above aspects, it is preferable that the left and right ports of the three-way intake pipe are connected to a port of a mixture pipe between the carburetor and the engine.
In any of the above aspects, preferably, an upper port of the air intake tee is connected to the air cleaner through the air supply hose.
In any of the above schemes, preferably, the air make-up solenoid valve is installed on the air supply hose near the upper port of the air inlet three-way pipe.
In any of the above schemes, preferably, the control unit includes a single chip microcomputer and a power amplifier, and the power amplifier is connected with the air make-up solenoid valve.
In any of the above aspects, it is preferable that a throttle handle is included, and the kill switch is mounted at the throttle handle.
In any of the above aspects, preferably, the vehicle further comprises a throttle cable, and the idle contact switch is mounted on the throttle cable.
In any one of the above aspects, preferably, an engine harness is included, and the control unit is mounted on the engine harness.
In any one of the above aspects, preferably, the engine includes a cylinder block, and the engine speed sensor is mounted on the cylinder block.
In any of the above aspects, it is preferable that the engine includes an igniter, and the engine speed sensor is mounted at the igniter.
In any one of the above aspects, it is preferable that the engine includes a magneto at which the engine speed sensor is mounted.
In any of the above aspects, it is preferable to include an odometer at which the driving wheel speed sensor is installed.
In any of the above aspects, preferably, the engine includes a transmission, and the range switch is installed in the transmission.
In any of the above aspects, preferably, the engine speed sensor is a hall sensor.
In any of the above aspects, the engine speed sensor is preferably a photoelectric speed sensor.
In any of the above aspects, it is preferable that the engine speed sensor is a capacitive speed sensor.
In any of the above aspects, it is preferable that the engine speed sensor is a variable reluctance speed sensor.
In any of the above aspects, preferably, the photoelectric rotation speed sensor is a direct-emitting photoelectric rotation speed sensor.
In any of the above aspects, preferably, the photoelectric rotation speed sensor is a reflection-type photoelectric rotation speed sensor.
In any of the above aspects, preferably, the photoelectric rotation speed sensor is a projection type photoelectric rotation speed sensor.
In any of the above aspects, it is preferable that the capacitive rotation speed sensor is an area variable capacitive rotation speed sensor.
In any of the above aspects, it is preferable that the capacitance type rotation speed sensor is a dielectric change type capacitance type rotation speed sensor.
In any of the above aspects, preferably, the variable reluctance rotation speed sensor is an inductance rotation speed sensor.
In any of the above aspects, it is preferable that the variable reluctance type rotation speed sensor is a transformer type rotation speed sensor.
In any of the above aspects, preferably, the variable reluctance type rotation speed sensor is an eddy current type rotation speed sensor.
In order to solve the technical defects of the control method of the electric control air supply system of the engine in the prior art, the invention adopts the following technical scheme: the device for implementing the method comprises the device for controlling flameout and fuel cut of the single-cylinder carburetor engine in any one of the preferred proposals, and preferably comprises a control working mode for preventing fuel from being sprayed out of the carburetor when the carburetor is flamed out: the control unit judges whether the throttle valve is in a rapid closing state or whether the flameout switch is in a connection state, if so, the control unit judges that the engine enters the flameout state and sends a control instruction, the control instruction is sent to the air supply electromagnetic valve through the power amplifier, and the air supply electromagnetic valve is immediately opened and supplies air to the air inlet three-way pipe, so that the reduction of the vacuum degree behind the throttle valve is realized, and the fuel oil is prevented from being sprayed out from the idle oil passage.
In any of the above aspects, it is preferable that the control operation mode for preventing the fuel injection from the carburetor when the vehicle is coasting is included: the control unit continuously scans the engine rotating speed sensor signal, the driving wheel speed sensor signal and the gear switch signal, once the engine rotating speed is lower than the folding wheel speed, no matter what position the throttle valve is and whether the flameout switch is in the on state, the control unit sends a control command, the control command is sent to the air supply electromagnetic valve through the power amplifier, the air supply electromagnetic valve is immediately opened and supplies air to the air inlet three-way pipe, and meanwhile, the ignition switch on the igniter is closed to complete flameout action of the engine, so that fuel oil is prevented from being sprayed out of a main oil channel or an idle oil channel of the carburetor; when the rotating speed signal sent by the engine rotating speed sensor to the control unit is zero, namely the engine stops rotating, the control unit immediately sends a control instruction to the air replenishing electromagnetic valve to control the air replenishing electromagnetic valve to complete the power-off reset action.
The folded wheel speed is the wheel speed multiplied by the gear ratio between the engine and the drive wheels.
In any of the above aspects, preferably, the normal operation mode of the engine is included: on the premise that the control working mode for preventing fuel from being sprayed out of the carburetor when flameout and the control working mode for preventing fuel from being sprayed out of the carburetor when the vehicle slides are not met, the control unit does not send any control instruction to the air make-up electromagnetic valve, and the engine is in a normal working state.
Compared with the prior art, the invention achieves the following technical effects:
the invention is suitable for the carburetor engine of an energy-saving sports car or a motorcycle, is convenient to install, saves energy, is safe, and can effectively prevent fuel oil in a float chamber of the carburetor from being sprayed into a throat under the action of high vacuum degree at the throat after the engine idleness or flameout, thereby greatly saving the fuel oil consumption. Meanwhile, the invention does not influence the normal braking of the energy-saving sports car or the motorcycle when in use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a preferred embodiment of the flameout and fuel cutoff control device for a single cylinder carburetor engine of the present invention;
FIG. 2 is a schematic diagram of the frame structure of a preferred embodiment of the flameout and fuel-cut control device for a single-cylinder carburetor engine according to the present invention.
Description of reference numerals: 1, a flameout switch; 2 idle speed contact switch; 3 a control unit; 4, a power amplifier; 5, an air supply electromagnetic valve; 6 an engine speed sensor; 7 driving wheel speed sensor; 8-gear switch; 9, an air inlet three-way pipe; 10 a carburetor; 11 an air cleaner; 12 an air supply hose; 13 a spark plug; 14 an engine; 15 accelerator pull wire; 16 igniter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a flameout and fuel-cut control device of a single-cylinder carburetor engine and a control method thereof, which are used for solving the technical problems in the prior art, and are used for sensing the running state through a plurality of sensors and controlling an air supply component to run.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment,
As shown in fig. 1-2, the present embodiment provides a single-cylinder carburetor type engine flameout and fuel-cut control device, which includes an air supply assembly, a flameout switch 1, an idle contact switch 2, an engine speed sensor 6, a driving wheel speed sensor 7, a gear switch 8 and a control unit, wherein the air supply assembly includes an air supply solenoid valve 5, and the control unit 3 is connected to the air supply solenoid valve 5, the flameout switch 1, the idle contact switch 2, the engine speed sensor 6, the driving wheel speed sensor 7 and the gear switch 8 through a first signal line, a second signal line, a third signal line, a fourth signal line, a fifth signal line and a sixth signal line, respectively.
The air supplementing assembly comprises an air filter 11, an air inlet three-way pipe 9, an engine 14, a carburetor 10 and an air supply hose 12, the left end port and the right end port of the air inlet three-way pipe 9 are respectively connected with a mixed air pipe opening between the carburetor 10 and the engine 14, the upper end port of the air inlet three-way pipe 9 is connected with the air filter 11 through the air supply hose 12, and an air supplementing electromagnetic valve 5 is installed on the air supply hose 12 close to the upper end port of the air inlet three-way pipe 9.
The control unit 3 comprises a singlechip and a power amplifier 4, and the power amplifier 4 is connected with the air supply electromagnetic valve 5. Comprises an accelerator handle, and a flameout switch 1 is arranged at the accelerator handle. Comprises an accelerator cable 15, and the idle speed contact switch 2 is arranged on the accelerator cable 15. Including the engine harness on which the control unit 3 is mounted. The engine 14 includes a cylinder block on which the engine speed sensor 6 is mounted. The engine 14 includes an igniter 16, and the engine speed sensor 6 is mounted at the igniter 16. The engine 14 includes a magneto at which the engine speed sensor 6 is mounted. Including an odometer where a driving wheel speed sensor 7 is installed. The engine 14 comprises a transmission in which the gear switch 8 is mounted.
The engine speed sensor 6 can be a hall sensor, a photoelectric speed sensor, a capacitive speed sensor or a variable reluctance speed sensor. The photoelectric rotating speed sensor can adopt a direct-emitting photoelectric rotating speed sensor or a reflection type photoelectric rotating speed sensor or a projection type photoelectric rotating speed sensor. The capacitance type rotating speed sensor can adopt an area change type capacitance type rotating speed sensor or a medium change type capacitance type rotating speed sensor. The variable magnetic resistance type rotating speed sensor can adopt an inductive rotating speed sensor or a transformer type rotating speed sensor or an eddy current type rotating speed sensor.
The rotation speed sensor is a sensor for converting the rotation speed of a rotating object into electric quantity to be output, belongs to an indirect measuring device, can be manufactured by a mechanical method, an electrical method, a magnetic method, an optical method and a mixed method, and can be divided into an analog type and a digital type according to different signal forms. The rotating speed sensor uses a magnetic sensitive resistor as an induction element, and the core component is a magnetic sensitive resistor as a detection element, and noise is reduced through a brand new signal processing circuit, so that the function is more complete. By comparing the output waveform of the gear type rotation speed sensor with that of other gear type rotation speed sensors, the measured rotation speed error is extremely small, and the linear characteristic has good consistency. The induction object is a magnetic material or a magnetic conduction material, such as magnetic steel, iron, electrical steel and the like. When the measured object is provided with a convex (or concave) magnetic or magnetic conductive material, the sensor outputs a pulse signal related to the rotation frequency when the magnetic or magnetic conductive material rotates along with the measured object, so that the purpose of sending out speed measurement or displacement detection is achieved.
The photoelectric rotation speed sensor is an angular displacement sensor, consists of a disc with a gap, a light source, a photoelectric device and an indicating gap disc which are arranged on a measured shaft, has the technical advantages of non-contact, high precision, high resolution, high reliability, quick response and the like, and is widely applied to the field of detection and control. The direct-emitting photoelectric rotation speed sensor comprises a perforated disc, a light source, a photosensitive element, a slit plate and the like, wherein an input shaft of the perforated disc is connected with a measured shaft, light emitted by the light source irradiates the photosensitive element through the perforated disc and the slit plate and is received by the photosensitive element, an optical signal is converted into an electric signal to be output, the perforated disc is provided with a plurality of small holes, the perforated disc rotates for a circle, the number of electric pulses output by the photosensitive element is equal to that of the holes of the disc, and therefore the measured rotation speed can be obtained by measuring the pulse frequency output by the photosensitive element. The reflective photoelectric rotating speed sensor mainly comprises a tested rotating component, a reflector (or a reflective sticker) and a reflective photoelectric sensor, and a better measuring effect can be obtained by symmetrically installing a plurality of reflectors or reflective stickers on the tested component under the condition of accurate positioning; when the testing distance is short and the testing requirement is not high, only one piece of reflective sticker can be installed on the tested part, at the moment, when the reflective sticker on the rotating part passes through the photoelectric sensor, the output of the photoelectric sensor jumps once, and the rotating speed n can be known by measuring the jump frequency f. The reading disc and the measuring disc of the projection type photoelectric rotating speed sensor are provided with gaps with the same interval, the measuring disc rotates along with a measured object, light projected on a photosensitive element from a light source generates light and shade change once when the measuring disc rotates through one gap, the photosensitive element outputs a current pulse signal, a reflection type photoelectric rotating speed sensor is provided with a reflection mark on a measured rotating shaft, the light emitted by the light source is incident on the measured rotating shaft through a lens and a semi-permeable membrane, when the rotating shaft rotates, the reflection mark changes the reflectivity of a projected light spot, and when the reflectivity is increased, the reflection light is projected on the photosensitive element through the lens to emit a pulse signal; when the reflectivity is reduced, the photosensitive element has no signal, and the rotating speed value of the rotating shaft can be measured by counting the signal within a certain time.
The area-variable capacitance type rotation speed sensor is composed of two fixed metal plates and a movable metal plate connected with a rotating shaft, wherein the movable metal plate is located at the position with the largest capacitance, and is located at the position with the smallest capacitance when the rotating shaft rotates 180 degrees, the periodic variation rate of the capacitance is the rotation speed, and the measurement signal of the rotation speed can be obtained by means of direct current excitation, alternating current excitation, an oscillation tank circuit of an oscillator formed by a variable capacitor and the like. The dielectric variable type capacitance type rotation speed sensor is formed by embedding a movable plate with high dielectric constant between two fixed electrode plates of a capacitor, the movable dielectric plate is connected with a rotation shaft, the dielectric constant between the capacitor plates changes periodically along with the rotation of the rotation shaft to cause the periodic change of capacitance, and the rate of the periodic change is equal to the rotation speed of the rotation shaft.
Example II,
The embodiment provides a flameout and fuel-cut control method for a single-cylinder carburetor type engine, and a device for implementing the method comprises the technical scheme of the flameout and fuel-cut control device for the single-cylinder carburetor type engine in the first embodiment, and comprises the following working modes:
control mode of operation to prevent fuel from being ejected from the carburetor 10 upon flame-out: the flameout switch signal and the idle contact switch signal are respectively read through the flameout switch 1 and the idle contact switch 2 and are sent to the control unit 3, the control unit 3 judges whether the throttle valve is in a rapid closing state or whether the flameout switch 1 is in a connection state, if the judgment is yes, the control unit 3 judges that the engine enters the flameout state and sends a control instruction, the control instruction is sent to the air supply electromagnetic valve 5 through the power amplifier 4, the air supply electromagnetic valve 5 is immediately opened and supplies air to the air inlet three-way pipe 9, the reduction of the vacuum degree behind the throttle valve is achieved, and fuel oil is prevented from being sprayed out of the idle oil duct.
Control mode of operation of the vehicle to prevent fuel injection from the carburetor 10 while coasting: the control unit 3 continuously scans signals of an engine speed sensor 6, a driving wheel speed sensor 7 and a gear switch 8, once the rotating speed of an engine 14 is lower than the folding wheel speed, no matter which position a throttle valve is located and whether a flameout switch 1 is in a connection state, the control unit 3 sends a control command, the control command is sent to an air supply electromagnetic valve 5 through a power amplifier 4, the air supply electromagnetic valve 5 is opened immediately and supplies air to an air inlet three-way pipe 9, and meanwhile, an ignition switch on an igniter 16 is closed to complete the flameout action of the engine, so that fuel is prevented from being sprayed out from a main oil duct or an idle oil duct of an oil carburetor 10; when the rotating speed signal sent by the engine rotating speed sensor 6 to the control unit 3 is zero, namely the engine stops rotating, the control unit 3 immediately sends a control instruction to the air replenishing electromagnetic valve 5 to control the air replenishing electromagnetic valve 5 to complete the power-off reset action.
The folded wheel speed is the wheel speed multiplied by the gear ratio between the engine and the drive wheel.
And (3) normal working mode of the engine: on the premise that the control operation mode for preventing fuel from being sprayed from the carburetor 10 when the vehicle is turned off and the control operation mode for preventing fuel from being sprayed from the carburetor 10 when the vehicle is coasting are not satisfied, the control unit 3 does not issue any control command to the air make-up solenoid valve 5, and the engine 14 is in a normal operation state.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The single cylinder carburetor type engine flameout and fuel cut-off control device is characterized in that: the device comprises an air supplementing assembly, a flameout switch (1), an idle speed contact switch (2), a control unit (3), an engine speed sensor (6), a driving wheel speed sensor (7) and a gear switch (8);
the air supplementing assembly comprises an air supplementing electromagnetic valve (5), an air filter (11), an air inlet three-way pipe (9), an engine (14), a carburetor (10) and an air supply hose (12), the left end port and the right end port of the air inlet three-way pipe (9) are respectively connected with a mixed gas pipe orifice between the carburetor (10) and the engine (14), and the upper end port of the air inlet three-way pipe (9) is connected with the air filter (11) through the air supply hose (12);
comprises an odometer, wherein a driving wheel speed sensor (7) is arranged at the odometer;
the generator (14) comprises an igniter (16), and the engine speed sensor (6) is arranged at the igniter (16);
the control unit (3) is respectively connected with the air supply electromagnetic valve (5), the flameout switch (1), the idle speed contact switch (2), the engine speed sensor (6), the driving wheel speed sensor (7) and the gear switch (8).
2. The single cylinder carburetor engine flameout and fuel cutoff control device according to claim 1, wherein: the air supply electromagnetic valve (5) is arranged on the air supply hose (12) close to the upper port of the air inlet three-way pipe (9).
3. A single cylinder carburetor type engine flameout and fuel-cut control device according to claim 2, characterized in that: the control unit (3) comprises a single chip microcomputer and a power amplifier (4), and the power amplifier (4) is connected with the air supply electromagnetic valve (5).
4. The single cylinder carburetor engine flameout and fuel cut control device of claim 2, wherein: the control unit (3) is respectively connected with the air supply electromagnetic valve (5), the flameout switch (1), the idling contact switch (2), the engine speed sensor (6), the driving wheel speed sensor (7) and the gear switch (8) through a first signal line, a second signal line, a third signal line, a fourth signal line, a fifth signal line and a sixth signal line.
5. The single cylinder carburetor engine flameout and fuel cut control device of claim 2, wherein: still include throttle and act as go-between (15), engine harness and throttle handle, install idle speed contact switch (2) on throttle is acted as go-between (15), the control unit (3) are installed on the engine harness, install flameout switch (1) throttle handle department.
6. The single cylinder carburetor engine flameout and fuel cutoff control device according to claim 1, wherein: the engine (14) comprises a transmission and a cylinder block, the engine rotation sensor (6) is mounted on the cylinder block, and the gear switch (8) is mounted in the transmission.
7. A single cylinder carburetor type engine flameout and fuel-cut control device according to claim 1, characterized in that: the engine rotating speed sensor (6) is a Hall sensor or a photoelectric rotating speed sensor or a capacitance type rotating speed sensor or a variable reluctance type rotating speed sensor.
8. The single cylinder carburetor engine flameout and fuel cutoff control device of claim 7, wherein: the photoelectric rotating speed sensor is a direct-emitting photoelectric rotating speed sensor or a reflective photoelectric rotating speed sensor or a projection photoelectric rotating speed sensor;
the capacitance type rotating speed sensor is an area change type capacitance type rotating speed sensor or a medium change type capacitance type rotating speed sensor;
the variable magnetic resistance type rotating speed sensor is an inductance type rotating speed sensor or a transformer type rotating speed sensor or an eddy current type rotating speed sensor.
9. A method for controlling the flameout and fuel cut of a single cylinder carburetor engine, the device for implementing the method comprising the device for controlling the flameout and fuel cut of the single cylinder carburetor engine according to any one of claims 1 to 8, wherein: the control system comprises a control working mode for preventing fuel from being sprayed out of a carburetor (10) when flameout occurs, a control working mode for preventing fuel from being sprayed out of the carburetor (10) when a vehicle slides, and a normal working mode of an engine;
-a control mode of operation preventing the fuel from being ejected from the carburetor (10) upon flame-out: the method comprises the steps that a flameout switch signal and an idle speed contact switch signal are respectively read through a flameout switch (1) and an idle speed contact switch (2) and are sent to a control unit (3), the control unit (3) judges whether a throttle valve is in a rapid closing state or whether the flameout switch (1) is in a connection state, if yes, the control unit (3) judges that an engine enters the flameout state and sends a control instruction, the control instruction is sent to an air supply electromagnetic valve (5) through a power amplifier (4), the air supply electromagnetic valve (5) is immediately opened and supplies air to an air inlet three-way pipe (9), the vacuum degree behind the throttle valve is reduced, and fuel oil is prevented from being sprayed out of an idle speed oil duct;
control mode of operation of the vehicle to prevent fuel injection from the carburetor (10) during coasting: control mode of operation of the vehicle to prevent fuel injection from the carburetor (10) during coasting: the control unit (3) continuously scans signals of an engine rotating speed sensor (6), a driving wheel speed sensor (7) and a gear switch (8), once the rotating speed of the engine (14) is lower than the speed of a folding wheel, no matter which position the throttle valve is located and whether the flameout switch (1) is in a connected state, the control unit (3) sends a control command, the control command is sent to the air supplementing electromagnetic valve (5) through the power amplifier (4), the air supplementing electromagnetic valve (5) is immediately opened and supplies air to the air inlet three-way pipe (9), and meanwhile, the ignition switch on the igniter (16) is closed to complete flameout of the engine, so that fuel oil is prevented from being sprayed out from a main oil duct or an idle oil duct of the carburetor (10); when the rotating speed signal sent by the engine rotating speed sensor (6) to the control unit (3) is zero, namely the engine stops rotating, the control unit (3) immediately sends a control instruction to the air replenishing electromagnetic valve (5) to control the air replenishing electromagnetic valve (5) to complete the power-off reset action;
and (3) normal working mode of the engine: on the premise that the control working mode for preventing fuel from being sprayed out of the carburetor (10) when flameout is not met and the control working mode for preventing fuel from being sprayed out of the carburetor (10) when the vehicle slides, the control unit (3) does not send any control instruction to the air replenishing electromagnetic valve (5), and the engine (14) is in a normal working state.
10. The single cylinder carburetor engine flameout and fuel cut control method according to claim 9, wherein: the folded wheel speed is the wheel speed multiplied by the gear ratio between the engine and the drive wheels.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210846673.3A CN115163314A (en) | 2017-05-27 | 2017-05-27 | Single-cylinder carburetor type engine flameout and fuel cut-off control device and control method thereof |
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| CN202210846673.3A CN115163314A (en) | 2017-05-27 | 2017-05-27 | Single-cylinder carburetor type engine flameout and fuel cut-off control device and control method thereof |
| CN201710391979.3A CN106988899A (en) | 2017-05-27 | 2017-05-27 | The flame-out device for controlling fuel injection of single cylinder carburetor engine and its control method |
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| CN201710391979.3A Division CN106988899A (en) | 2017-05-27 | 2017-05-27 | The flame-out device for controlling fuel injection of single cylinder carburetor engine and its control method |
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| CN201710391979.3A Pending CN106988899A (en) | 2017-05-27 | 2017-05-27 | The flame-out device for controlling fuel injection of single cylinder carburetor engine and its control method |
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| CN106988899A (en) | 2017-07-28 |
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