CN112267927B - Small gasoline engine test engine oil automatic injection system and working method thereof - Google Patents
Small gasoline engine test engine oil automatic injection system and working method thereof Download PDFInfo
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- CN112267927B CN112267927B CN202010957177.6A CN202010957177A CN112267927B CN 112267927 B CN112267927 B CN 112267927B CN 202010957177 A CN202010957177 A CN 202010957177A CN 112267927 B CN112267927 B CN 112267927B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M7/00—Lubrication means specially adapted for machine or engine running-in
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention discloses an automatic engine oil injection system for a small gasoline engine test run, which comprises a heating and heat-preserving box device, a constant pressure pump, an atomizing spray head device and an electric control device, wherein the heating and heat-preserving box device is connected with the constant pressure pump; the heating and heat-preserving box device provides engine oil with a certain temperature, the constant pressure pump can pump the engine oil out of the heating and heat-preserving box device and provide the engine oil for the atomizing nozzle device, and the electric control device controls the engine oil to be sprayed into a box body of the small gasoline engine from the atomizing nozzle device. The working method comprises (1) filling engine oil into the heating and insulating box device; (2) heating the engine oil to 80 ℃ and preserving heat; (3) starting the constant pressure pump, and inserting a nozzle of the atomizing nozzle device into a through hole matched with a small gasoline engine box body; (4) under the control of an electric control device, controlling the frequency (6) of engine oil sprayed into the box body to carry out high-speed and idling operation; (7) the running time of the test run is controlled to be 1 minute to 1 and a half minutes; (9) stopping the test run, and drawing the atomizer device out of the through hole of the drawing box body; (10) and finally, the hook-type rubber plug is used for plugging the through hole of the box body.
Description
Technical Field
The invention relates to a small gasoline engine test engine oil automatic injection system and a working method thereof.
Background
The small gasoline engine needs to be tested before leaving a factory, and the test run time is about 1 minute generally in the test run process. At present, the small gasoline engine delivery test run program is as follows: firstly, adding a proper amount of gasoline into an oil tank of a small gasoline engine, simultaneously adding a proper amount of engine oil into a box body of the small gasoline engine, starting the small gasoline engine to run at a high speed and at an idle speed, splashing the engine oil by the engine oil in the box body through an oil needle, directly dropping oil particles of the splashed engine oil onto surfaces needing to be lubricated, such as a cylinder, a piston, a connecting rod big head and a small head, and the like, so that the friction surfaces are lubricated, redundant engine oil flows back to the bottom of the box body, the small gasoline engine stops after running for about 1 minute, finally the engine oil in the box body is extracted by manpower or machines, or else, during transportation, residual engine oil may flow into the combustion chamber of the cylinder during overturning, the ignition electrode of the spark plug is soaked and wetted and cannot be ignited and work normally, or residual engine oil enters the carburetor through the intake valve, so that normal oil spraying and atomization of the spray pipe are influenced, and the normal work is influenced due to the fact that the spray pipe cannot catch fire. Because the operation of taking a trial run is after stopping, the machine oil in the box must be taken out through manual work or machines, consequently prolonged the time of taking a trial run greatly, it is time-consuming to take a lot of work. Meanwhile, the running time of the test run is about 1 minute, the time is short, the temperature of the engine oil in the box body is low, the oil atomization effect of the splashed engine oil is poor, the early abrasion is aggravated, and the service life of the small gasoline engine is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a small gasoline engine test engine oil automatic injection system and a working method thereof.
In order to solve the technical problem, the invention discloses an automatic engine oil injection system for a small gasoline engine test run, which comprises a heating and heat-preserving box device, a constant pressure pump, an atomizing nozzle device and an electric control device; the heating and heat-preserving box device provides engine oil with a certain temperature, the constant pressure pump can pump the engine oil out of the heating and heat-preserving box device and provide the engine oil for the atomizing nozzle device, and the electric control device controls the engine oil to be sprayed into a box body of the small gasoline engine in a test run process from the atomizing nozzle device.
Preferably, the heating and heat-preserving box device comprises an oil tank, an electric heating device and a temperature controller, wherein the electric heating device is arranged at the lower part of the oil tank, the temperature controller is connected with the electric heating device, and a thermocouple of the temperature controller is inserted into the oil tank; the inlet of the constant pressure pump is connected with the oil tank through a heat preservation pipe, the outlet of the constant pressure pump is connected with the inlet of the atomizing nozzle device through a heat preservation hose, and an electromagnetic valve is arranged on the heat preservation hose between the outlet of the constant pressure pump and the inlet of the atomizing nozzle device.
Preferably, the atomizing nozzle device comprises a nozzle, a spray pipe and an operation and control mechanism, wherein the operation and control mechanism comprises a sleeve, a pressing block, a clamping jaw, a spring, a limiting block and a lath, the sleeve is of a step structure and comprises a front part and a rear part, the diameter of the front part is smaller than that of the rear part, the joint of the front part and the rear part is of a circular structure, the spray pipe is arranged in the inner center of the sleeve, a front port and a rear port of the spray pipe are respectively positioned on through holes arranged on the front end surface and the rear end surface of the sleeve, the nozzle is arranged on the front end surface of the spray pipe and communicated with the sleeve, the spring is arranged between the spray pipe and the sleeve and is symmetrically arranged, one end of the spring is fixed on the surface of the spray pipe, the other end of the spring is fixed on one side surface of the lath, one end of the pressing block is fixed on the other side surface of the lath, the other end of the pressing block penetrates through a hole which is matched with the pressing block and is arranged on the rear part of the sleeve, one end of the clamping jaw is fixed on the other side surface of the lath, and the other end of the clamping jaw penetrates through a hole which is formed in the front part of the sleeve and is matched with the clamping jaw, a limiting block is arranged on the spray pipe, and the distance between the annular structure and the clamping jaw is wider than the wall thickness of the small gasoline engine box body.
Preferably, the front end part of the front part of the sleeve is of a cone structure.
Preferably, the electric control device comprises a hall sensor, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a comparator U2A, an NPN darlington tube Q1, a freewheeling diode D1, a power source VCC and a power source VDD, wherein one ends of the resistor R1 and the resistor R2 are connected to the power source VCC, the other end of the resistor R1 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to a forward input end of the comparator U2A, the other ends of the resistor R2 and the resistor R3 are connected to a reverse input end of the comparator U2A, the other end of the resistor R3 is grounded, the VCC of the comparator U2A is connected to the power source VCC, the GND end of the comparator U2A is grounded, the output end of the comparator U2A is connected to the base of the NPN darlington tube Q1, the emitter of the NPN darlington tube Q1 is grounded, the collector of the darlington tube Q1 is connected to one end of the coil L1 of the solenoid valve, the other end of the solenoid valve is connected to the negative pole VDD diode VDD 1, the anode of the freewheeling diode D1 is connected with the collector of the NPN Darlington tube Q1, the V + pin of the Hall sensor is connected with the power supply VCC, the GND pin of the Hall sensor is grounded, and the OUT pin of the Hall sensor is connected with the other end of the resistor R1; the Hall sensor is arranged on a volute of the small gasoline engine and is positioned near the flywheel; after the small gasoline engine is started, the flywheel rotates, when an ignition magnetic shoe on the flywheel passes through the Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of the comparator U2A outputs VCC voltage, an NPN Darlington pipe Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and the atomizing nozzle device sprays oil; when the ignition magnetic shoe on the flywheel is far away from the Hall sensor, the OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of the positive input end of the comparator U2A is lower than the voltage of the negative input end of the comparator U2A, the output end of the comparator U2A outputs 0, the NPN Darlington tube Q1 is cut off, the coil L1 of the electromagnetic valve is de-energized, the electromagnetic valve is closed, and the atomizing nozzle device stops oil injection.
Preferably, the oil tank is provided with a heat insulation layer.
Based on the small gasoline engine test engine oil automatic injection system, the invention also provides a working method of the small gasoline engine test engine oil automatic injection system, which comprises the following steps:
(1) filling engine oil into the heating and heat-preserving box device;
(2) opening the electric heating device, heating the engine oil in the heating and heat-preserving box device to 80 ℃, and then preserving heat;
(3) starting the constant pressure pump, inserting a nozzle of the atomizer device into a through hole matched with a small gasoline engine box body, and enabling the wall thickness of the box body to be positioned between the annular structure of the sleeve and the clamping jaw;
(4) starting the small gasoline engine, under the control of an electric control device, when an ignition magnetic shoe on a flywheel of the small gasoline engine passes through a Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs VCC voltage, an NPN Darlington tube Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and a nozzle of an atomization nozzle device sprays engine oil into a box body of the small gasoline engine; when an ignition magnetic shoe on the flywheel is far away from the Hall sensor, an OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of a forward input end of a comparator U2A is lower than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs 0, an NPN Darlington tube Q1 is cut off, a coil L1 of an electromagnetic valve is de-energized, the electromagnetic valve is closed, and the atomizing nozzle device stops spraying engine oil into a small gasoline engine box body;
(5) the frequency of the atomizer device for spraying engine oil into the small gasoline engine box body is changed along with the change of the rotating speed of the flywheel under the control of the electric control device, and once high-temperature atomized engine oil is sprayed into the small gasoline engine box body by the atomizer device every time the flywheel rotates for one circle;
(6) the small gasoline engine runs at high speed and idling speed;
(7) the trial run time of the small gasoline engine is controlled to be 1 minute to 1 and a half minutes;
(9) the small gasoline engine stops running in a test run, a pressing block of the atomizer device is pressed, and the atomizer device is drawn out from a through hole of the drawing box body;
(10) and finally, the hook-type rubber plug is used for plugging the through hole of the box body.
The invention has the advantages that the engine oil is heated by the heating insulation box device, the engine oil is pumped into the insulation hose by the constant pressure pump and the pressure in the insulation hose is kept, the high-temperature atomized engine oil is sprayed into the box body of the small gasoline engine once by one turn along with the rotation of the flywheel under the control of the electric control device, and the box body is filled with the high-temperature atomized engine oil, so that the cylinder, the piston, the connecting rod and the like in the box body are fully lubricated during the test run of the small gasoline engine. The defect that in the prior art, after the test run is stopped, engine oil in the box body needs to be drawn out manually or by machines, so that the test run time is greatly prolonged, and labor and time are wasted is overcome. In the test run process, the high-temperature atomized engine oil is filled in the box body, and the cylinder, the piston, the big end and the small end of the connecting rod and the like in the box body are fully lubricated, so that the service life is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a trial run engine oil automatic injection system of a small gasoline engine of the present invention;
FIG. 2 is a schematic structural view of the atomizer apparatus;
fig. 3 is an electrical schematic of the electrical control device.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
as shown in figure 1, the invention discloses an automatic engine oil injection system for a small gasoline engine test run, which comprises a heating and heat-preserving box device, a constant pressure pump 1, an atomizing nozzle device 6 and an electric control device 4. The heating and heat-preserving box device provides engine oil with a certain temperature, the constant pressure pump can pump the engine oil out of the heating and heat-preserving box device and provide the engine oil for the atomizer device 6, and the electric control device 4 controls the engine oil to be sprayed into a box body of the small gasoline engine in the test run process from the atomizer device 6.
In order to simplify the structure and reduce the cost, the heating and heat-insulating box device comprises an oil tank 9, an electric heating device 7 and a temperature controller 8, wherein the electric heating device 7 is arranged at the lower part of the oil tank 9, the temperature controller 8 is connected with the electric heating device 7, and a thermocouple of the temperature controller 8 is inserted into the oil tank 9. Since the electric heating device 7 and the thermostat 8 are prior art, they will not be described in detail. The inlet of the constant pressure pump 1 is connected with the oil tank 9 through a heat preservation pipe 10, the outlet of the constant pressure pump 1 is connected with the inlet of the atomizing nozzle device 6 through a heat preservation hose, and the solenoid valve 3 is arranged on the heat preservation hose between the outlet of the constant pressure pump 1 and the inlet of the atomizing nozzle device 6. In this embodiment, the outlet of the constant pressure pump 1 is connected to the electromagnetic valve 3 through the first heat-insulating hose 2, and the electromagnetic valve 3 is connected to the inlet of the atomizer device 6 through the second heat-insulating pipe 5.
To simplify construction, reduce cost and facilitate handling, the atomizer head assembly, as shown in fig. 2, comprises a nozzle 11, a nozzle 18 and an actuating mechanism. The control mechanism comprises a sleeve 14, a pressing block 15, a claw 12, a spring 13, a limiting block 16 and a strip 17. The sleeve 14 is a stepped structure comprising a front portion and a rear portion, the diameter of the front portion being smaller than the diameter of the rear portion, and the junction between the front portion and the rear portion being in the form of a ring 19. The nozzle 18 is disposed at the inner center of the sleeve 14, and the front and rear ports of the nozzle 18 are located on through holes provided on the front and rear end surfaces of the sleeve 14, respectively. The nozzle 11 is arranged on the front end face of the spray pipe 18 and is communicated with the spray pipe 18. The spring 13 is located between the nozzle 18 and the sleeve 14, and the spring 13 is symmetrically arranged, one end of the spring 13 being fixed to the surface of the nozzle 18 and the other end of the spring 13 being fixed to a side of the strip 17. One end of the pressing block 15 is fixed on the other side surface of the strip 17, and the other end of the pressing block 15 passes through a hole which is arranged at the rear part of the sleeve 14 and is matched with the pressing block 15. One end of the jaw 12 is fixed to the other side of the strip 17 and the other end of the jaw 12 passes through a hole provided in the front of the sleeve 14 to fit the jaw 12. The spray pipe 18 is provided with a limiting block 16, and the distance between the annular structure 19 and the clamping jaw 12 is wider than the wall thickness of the small gasoline engine box body.
For further ease of handling, the forward end portion, which is the forward portion of the sleeve 14, is of a frustoconical configuration.
In order to simplify the structure and reduce the cost, the electric control device 4, as shown in fig. 3, includes a hall sensor, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a comparator U2A, an NPN darlington Q1, a freewheeling diode D1, a power source VCC, and a power source VDD. One end of a resistor R1 and one end of a resistor R2 are both connected with a power supply VCC, the other end of a resistor R1 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with a forward input end of a comparator U2A, the other end of a resistor R2 and one end of a resistor R3 are both connected with a reverse input end of the comparator U2A, the other end of a resistor R3 is grounded, the VCC of the comparator U2A is connected with the power supply VCC, the GND end of the comparator U2A is grounded, the output end of the comparator U2A is connected with the base of an NPN Darlington tube Q1, the emitter of the NPN Darlington tube Q1 is grounded, and the collector of the NPN Darlington tube Q1 is connected with one end of a coil L1 of the electromagnetic valve, the other end of a coil L2 of the electromagnetic valve is connected with a power supply VDD, the negative electrode of a fly-wheel diode D1 is connected with the power supply VDD, the positive electrode of a fly-wheel diode D1 is connected with the collector electrode of an NPN Darlington tube Q1, the V + end pin of the Hall sensor is connected with a power supply VCC, the GND end pin of the Hall sensor is grounded, and the OUT end pin of the Hall sensor is connected with the other end of a resistor R1; the Hall sensor is arranged on a volute of the small gasoline engine and is positioned near the flywheel; after the small gasoline engine is started, the flywheel rotates, when an ignition magnetic shoe on the flywheel passes through the Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of the comparator U2A outputs VCC voltage, an NPN Darlington pipe Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and the atomizing nozzle device sprays oil; when an ignition magnetic shoe on the flywheel is far away from the Hall sensor, an OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of a forward input end of a comparator U2A is lower than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs 0, an NPN Darlington tube Q1 is cut off, a coil L1 of an electromagnetic valve is de-energized, the electromagnetic valve is closed, the atomizing nozzle device stops oil injection, a flywheel diode D1 absorbs current in a circuit, and the NPN Darlington tube Q1 is protected.
In order to save energy, the oil tank 9 is provided with a heat-insulating layer.
Based on the small gasoline engine test engine oil automatic injection system, the invention also provides a working method of the small gasoline engine test engine oil automatic injection system, which comprises the following steps:
(1) filling engine oil into the heating and heat-preserving box device;
(2) opening the electric heating device 7, heating the engine oil in the heating and heat-preserving box device to 80 ℃, and then preserving heat;
(3) starting the constant pressure pump 1, inserting a nozzle 11 of the atomizer device 6 into a through hole matched with a small gasoline engine box body, and enabling the wall thickness of the box body to be positioned between the annular structure 19 of the sleeve 14 and the clamping jaw 12;
(4) starting the small gasoline engine, under the control of the electric control device 4, when an ignition magnetic shoe on a flywheel of the small gasoline engine passes through the Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of the comparator U2A outputs VCC voltage, an NPN Darlington tube Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and the nozzle 11 of the atomizer device 6 sprays engine oil into a box body of the small gasoline engine; when an ignition magnetic shoe on the flywheel is far away from the Hall sensor, an OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of a forward input end of a comparator U2A is lower than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs 0, an NPN Darlington tube Q1 is cut off, a coil L1 of an electromagnetic valve is de-energized, the electromagnetic valve is closed, and the atomizing nozzle device stops spraying engine oil into a small gasoline engine box body;
(5) the frequency of the atomizer 6 for spraying the engine oil into the small gasoline engine box body is changed along with the change of the rotating speed of the flywheel under the control of the electric control device 4, and once high-temperature atomized engine oil is sprayed into the small gasoline engine box body by the atomizer 6 every time the flywheel rotates for one circle;
(6) the small gasoline engine runs at high speed and idling speed;
(7) the trial run time of the small gasoline engine is controlled to be 1 minute to 1 and a half minutes;
(9) when the test run of the small gasoline engine is stopped, the pressing block 15 of the atomizer device 6 is pressed down, and the atomizer device 6 is drawn out from the through hole of the drawing box body;
(10) and finally, the hook-type rubber plug is used for plugging the through hole of the box body.
Above-mentioned small-size gasoline engine machine automatic injection system of taking a trial run machine oil heats through heating insulation can device, utilizes constant-pressure pump 1 to take out the machine oil to the insulation can in the hose and keeps the pressure in the insulation can, under the control of electrically controlled device 6, along with the rotation of flywheel, every turn, atomizing shower nozzle device 6 spouts once high temperature atomized machine oil to small-size gasoline engine box, because high temperature atomized machine oil is full of in the box, has just so guaranteed that small-size gasoline engine when the operation of taking a trial run, cylinder, piston, connecting rod big small-end etc. in the box obtain abundant lubrication. The defect that in the prior art, after the test run is stopped, engine oil in the box body needs to be drawn out manually or by machines, so that the test run time is greatly prolonged, and labor and time are wasted is overcome. In the test run process, the high-temperature atomized engine oil is filled in the box body, and the cylinder, the piston, the big end and the small end of the connecting rod and the like in the box body are fully lubricated, so that the service life is prolonged.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. An automatic engine oil injection system for a small gasoline engine test run is characterized by comprising a heating and heat-preserving box device, a constant pressure pump, an atomizing nozzle device and an electric control device; the heating and heat-preserving box device provides engine oil with a certain temperature, the constant pressure pump can pump the engine oil out of the heating and heat-preserving box device and provide the engine oil for the atomizing nozzle device, and the electric control device controls the engine oil to be sprayed into a box body of the small gasoline engine in the test run process from the atomizing nozzle device;
the atomizing nozzle device comprises a nozzle, a spray pipe and an operation and control mechanism, wherein the operation and control mechanism comprises a sleeve, a pressing block, a clamping jaw, a spring, a limiting block and a lath, the sleeve is of a step structure and comprises a front part and a rear part, the diameter of the front part is smaller than that of the rear part, the joint of the front part and the rear part is of a circular structure, the spray pipe is arranged in the inner center of the sleeve, a front port and a rear port of the spray pipe are respectively positioned on through holes arranged on the front end surface and the rear end surface of the sleeve, the nozzle is arranged on the front end surface of the spray pipe and communicated with the sleeve, the spring is arranged between the spray pipe and the sleeve and symmetrically arranged, one end of the spring is fixed on the surface of the spray pipe, the other end of the spring is fixed on one side surface of the lath, one end of the pressing block is fixed on the other side surface of the lath, the other end of the pressing block penetrates through a hole which is arranged on the rear part of the sleeve and matched with the pressing block, one end of the clamping jaw is fixed on the other side surface of the lath, the other end of the clamping jaw penetrates through a hole which is formed in the front part of the sleeve and matched with the clamping jaw, a limiting block is arranged on the spray pipe, and the distance between the annular structure and the clamping jaw is wider than the wall thickness of the small gasoline engine box body;
the heating and heat-preserving box device comprises an oil tank, an electric heating device and a temperature controller, wherein the electric heating device is arranged at the lower part of the oil tank, the temperature controller is connected with the electric heating device, and an electric thermocouple of the temperature controller is inserted into the oil tank; the inlet of the constant pressure pump is connected with the oil tank through a heat insulation pipe, the outlet of the constant pressure pump is connected with the inlet of the atomizing nozzle device through a heat insulation hose, and an electromagnetic valve is arranged on the heat insulation hose between the outlet of the constant pressure pump and the inlet of the atomizing nozzle device;
the front end part of the front part of the sleeve is of a frustum structure;
and the oil tank is provided with a heat-insulating layer.
2. The automatic small gasoline engine test engine oil injection system as claimed in claim 1, wherein the electronic control device comprises a hall sensor, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a comparator U2A, an NPN Darlington tube Q1, a freewheeling diode D1, a power VCC and a power VDD, one end of each of the resistor R1 and the resistor R2 is connected to the power VCC, the other end of the resistor R1 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to a forward input end of the comparator U2A, the other end of the resistor R2 and one end of the resistor R3 are connected to a reverse input end of the comparator U2A, the other end of the resistor R3 is grounded, the VCC power VCC of the comparator U2A is connected to the ground, the GND end of the comparator U2A is connected to the ground, the output end of the comparator U2A is connected to the base of the NPN Darlington tube Q2, the emitter of the Darlington tube Q1 is connected to the collector of the NPN solenoid valve 1, the other end of a coil L1 of the electromagnetic valve is connected with a power supply VDD, the negative electrode of a fly-wheel diode D1 is connected with the power supply VDD, the positive electrode of a fly-wheel diode D1 is connected with the collector electrode of an NPN Darlington tube Q1, the V + end pin of the Hall sensor is connected with a power supply VCC, the GND end pin of the Hall sensor is grounded, and the OUT end pin of the Hall sensor is connected with the other end of a resistor R1; the Hall sensor is arranged on a volute of the small gasoline engine and is positioned near the flywheel; after the small gasoline engine is started, the flywheel rotates, when an ignition magnetic shoe on the flywheel passes through the Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of the comparator U2A outputs VCC voltage, an NPN Darlington pipe Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and the atomizing nozzle device sprays oil; when the ignition magnetic shoe on the flywheel is far away from the Hall sensor, the OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of the positive input end of the comparator U2A is lower than the voltage of the negative input end of the comparator U2A, the output end of the comparator U2A outputs 0, the NPN Darlington tube Q1 is cut off, the coil L1 of the electromagnetic valve is de-energized, the electromagnetic valve is closed, and the atomizing nozzle device stops oil injection.
3. A working method of a small gasoline engine test engine oil automatic injection system comprises the following steps:
(1) filling engine oil into the heating and heat-preserving box device;
(2) opening the electric heating device, heating the engine oil in the heating and heat-preserving box device to 80 ℃, and then preserving heat;
(3) starting the constant pressure pump, inserting a nozzle of the atomizer device into a through hole matched with a small gasoline engine box body, and enabling the wall thickness of the box body to be positioned between the annular structure of the sleeve and the clamping jaw;
the atomizing nozzle device comprises a nozzle, a spray pipe and an operation and control mechanism, wherein the operation and control mechanism comprises a sleeve, a pressing block, a clamping jaw, a spring, a limiting block and a lath, the sleeve is of a step structure and comprises a front part and a rear part, the diameter of the front part is smaller than that of the rear part, the joint of the front part and the rear part is of a circular structure, the spray pipe is arranged in the inner center of the sleeve, a front port and a rear port of the spray pipe are respectively positioned on through holes arranged on the front end surface and the rear end surface of the sleeve, the nozzle is arranged on the front end surface of the spray pipe and communicated with the sleeve, the spring is arranged between the spray pipe and the sleeve and symmetrically arranged, one end of the spring is fixed on the surface of the spray pipe, the other end of the spring is fixed on one side surface of the lath, one end of the pressing block is fixed on the other side surface of the lath, the other end of the pressing block penetrates through a hole which is arranged on the rear part of the sleeve and matched with the pressing block, one end of the clamping jaw is fixed on the other side surface of the lath, the other end of the clamping jaw penetrates through a hole which is formed in the front part of the sleeve and matched with the clamping jaw, a limiting block is arranged on the spray pipe, and the distance between the annular structure and the clamping jaw is wider than the wall thickness of the small gasoline engine box body;
(4) starting the small gasoline engine, under the control of an electric control device, when an ignition magnetic shoe on a flywheel of the small gasoline engine passes through a Hall sensor, an OUT terminal pin of the Hall sensor outputs a high level signal, the voltage of a forward input end of a comparator U2A is higher than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs VCC voltage, an NPN Darlington tube Q1 is conducted, a coil L1 of an electromagnetic valve is electrified, the electromagnetic valve is opened, and a nozzle of an atomization nozzle device sprays engine oil into a box body of the small gasoline engine; when an ignition magnetic shoe on the flywheel is far away from the Hall sensor, an OUT terminal pin of the Hall sensor outputs a low-level signal, the voltage of a forward input end of a comparator U2A is lower than the voltage of a reverse input end of a comparator U2A, the output end of a comparator U2A outputs 0, an NPN Darlington tube Q1 is cut off, a coil L1 of an electromagnetic valve is de-energized, the electromagnetic valve is closed, and the atomizing nozzle device stops spraying engine oil into a small gasoline engine box body;
(5) the atomizing spray head device is controlled by the electric control device, the frequency of spraying engine oil into the small gasoline engine box body by the spray head of the atomizing spray head device is changed along with the change of the rotating speed of the flywheel, and once high-temperature atomized engine oil is sprayed into the small gasoline engine box body by the atomizing spray head device every time the flywheel rotates for one circle;
(6) the small gasoline engine runs at high speed and idling speed;
(7) the trial run time of the small gasoline engine is controlled to be 1 minute to 1 and a half minutes;
(8) the small gasoline engine stops running in a test run, a pressing block of the atomizer device is pressed, and the atomizer device is drawn out from a through hole of the drawing box body;
(9) and finally, the hook-type rubber plug is used for plugging the through hole of the box body.
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| CN202250427U (en) * | 2011-07-01 | 2012-05-30 | 山东理工大学 | Electronic fuel injection controlling system of small gasoline engine |
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| CN2033444U (en) * | 1988-01-01 | 1989-03-01 | 张建功 | Multi-function automatic controll instrument for oil extractor |
| CN2227746Y (en) * | 1995-02-25 | 1996-05-22 | 黄友华 | Hall effect contactless closed angle controlled electronic ignitor |
| CN100416076C (en) * | 2006-06-07 | 2008-09-03 | 浙江工业大学 | Low-pressure oil supply system for diesel vehicle |
| CN203413331U (en) * | 2013-06-05 | 2014-01-29 | 胜利油田胜利动力机械集团有限公司 | Portable engine oil treatment vehicle |
| JP2015209796A (en) * | 2014-04-25 | 2015-11-24 | ダイハツ工業株式会社 | Lubrication device of internal combustion engine |
| CN203925650U (en) * | 2014-05-27 | 2014-11-05 | 潍柴动力股份有限公司 | A kind of engine oil heating device |
| CN106623192A (en) * | 2016-12-23 | 2017-05-10 | 四川成发航空科技股份有限公司 | Cleaning equipment for clean aeroengine case |
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| JP2003293717A (en) * | 2002-04-03 | 2003-10-15 | Mitsubishi Heavy Ind Ltd | Diesel engine, generator and diesel engine operating method |
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