CN112983591A

CN112983591A - Integrated pre-lubrication type engine cycloid rotor pump structure and control method thereof

Info

Publication number: CN112983591A
Application number: CN202110428845.0A
Authority: CN
Inventors: 朱昌吉; 张豪; 高腾麟; 李亚军; 李岩
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-06-18

Abstract

The invention belongs to the technical field of pre-lubrication of automobile engines, and particularly relates to an integrated pre-lubrication type engine cycloid rotor pump structure and a control method thereof, wherein the structure comprises a first pump cover, wherein the outer side of the first pump cover is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface, three bolt holes and three threaded holes are distributed on the first pump cover, and the threaded holes are used for connecting the whole oil pump into a whole; the outer end of the main shaft is provided with a transmission gear, and the inner end of the main shaft is connected with the inner rotor through a first cylindrical pin; the inner rotor is internally meshed with the outer rotor, and forms a cycloid rotor pump A with the first pump cover, the main shaft, the first pump body, the partition plate and the first cylindrical pin.

Description

Integrated pre-lubrication type engine cycloid rotor pump structure and control method thereof

Technical Field

The invention relates to the technical field of pre-lubrication of automobile engines, in particular to an integrated pre-lubrication type engine cycloid rotor pump structure and a control method thereof.

Background

According to data statistics, about 30% of energy in the world is consumed by various types of friction, and the engine is the same, and the internal abrasion loss power of the engines in different technical states accounts for 20% -25% of the indicated power, and the abrasion loss power of the engines in serious conditions can even reach about 35%. The wear of the vehicle engine is mainly manifested in the starting moment, particularly in cold and hot starts. Common tests by the society of automotive engineers and the dow gras company have shown that the wear of an engine at cold start accounts for between 60% and 80% of the total wear.

When an engine is started in a cold state, the traditional oil pump has a slow rotating speed, a crankshaft cannot provide sufficient power for the oil pump, and the operation time of about 10 seconds is needed for establishing proper oil lubrication pressure. During which the surfaces of the friction pairs inside the engine are in a semi-dry friction or dry friction state. Over the long term, wear of moving parts of the engine is accelerated, reducing the service life of the parts, and therefore it is necessary to increase the pre-lubrication device of the engine.

The existing pre-lubrication devices mainly have the following forms:

a starter drive type. The lubricating device is characterized in that an oil pump is additionally arranged at one end of a commutator of an engine starter armature shaft, and a control circuit is additionally arranged. Before starting, the starter drives the additional engine oil pump to work, and the engine oil in the oil pan is pressed into the main oil duct to provide lubricating oil for the friction pairs of various moving parts.

Driven by an independent motor. The structure and principle of the pre-lubricating device are different from those of a starter driving type, and the pre-lubricating device mainly differs from a starter driving type in that a power source is changed into a direct current motor, and a control circuit is also greatly different.

And (4) an energy storage type. The pre-lubricating device does not need to additionally arrange an oil pump and a motor, only needs to arrange an electric control type pressure engine oil accumulator on the main oil duct of the engine, stores oil when the engine normally runs, and releases pressure engine oil from the accumulator into the main oil duct to provide lubricating engine oil for each friction pair when the engine is started next time.

The starter driving type pre-lubricating device and the independent motor driving type pre-lubricating device have the disadvantages that an oil pump, a power source, a lubricating oil way and the like are required to be additionally arranged, the device is complex in structure, expensive in manufacturing cost and large in occupied space, the direct current motor can greatly depend on the power of a storage battery during working, and pre-lubricating can not be well completed when the power of the storage battery is insufficient in winter. The energy storage type engine has the disadvantages that a large oil storage device is needed, the occupied space is large, the oil storage amount is limited, and when the engine is not started successfully for the first time, the energy storage device cannot perform engine starting pre-lubrication for the second time due to the fact that the oil storage process is not performed; secondly, the energy storage type oil reservoir cannot store pressure for a long time, and when the vehicle is not used for a long time, the pressure engine oil needs to be decompressed, and in this case, the engine cannot be pre-lubricated for starting.

The power source used in the invention is a pneumatic motor. A pneumatic motor is a pneumatic actuator in a pneumatic transmission that converts the pressure of compressed gas into mechanical energy and produces rotational motion. If the pneumatic motor is considered to be used for providing power for the lubricating system before the engine is started to carry out starting pre-lubrication, the abrasion among all friction pairs can be reduced, and the service life of the engine and parts thereof can be effectively prolonged.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The invention provides a novel oil pump, which is provided in view of the problems in the existing oil pump.

Therefore, the invention aims to provide an integrated pre-lubrication type engine cycloid rotor pump structure and a control method thereof, which can reduce the abrasion among all friction pairs and effectively prolong the service life of an engine and parts thereof.

To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:

the utility model provides an integrated prelubrication formula engine cycloid impeller pump structure and control method thereof, it includes pump cover No. one, main shaft, pump body No. one, division board, pump body No. two, pump cover No. two, half key, countershaft, pump cover No. three, motor housing, distribution surface No. one, bolt hole, screw hole, oil duct, outer rotor, inner rotor, cylindric lock No. one, outer rotor, inner rotor, cylindric lock No. two, distribution surface No. two, gas vent, blade, pneumatic motor rotor, air inlet, check valve, high-pressure gas pitcher, ECU, solenoid valve:

wherein

The outer side of the first pump cover is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface, and three bolt holes and three threaded holes are distributed on the first flow distribution surface and used for connecting the whole oil pump into a whole; the outer end of the main shaft is provided with a transmission gear, and the inner end of the main shaft is connected with the inner rotor through a first cylindrical pin; the inner rotor is internally meshed with the outer rotor and forms a cycloid rotor pump A with the first pump cover, the main shaft, the first pump body, the partition plate and the first cylindrical pin;

the inner side of the second pump cover is a second flow distribution surface, and the outer side of the second pump cover is an air motor; the outer end of the auxiliary shaft is connected with a pneumatic motor rotor through a semicircular key, and the inner end of the auxiliary shaft is connected with the inner rotor through a second cylindrical pin; the inner rotor is internally meshed with the outer rotor and forms a cycloid rotor pump B with the partition plate, the second pump body, the second pump cover, the auxiliary shaft and the second cylindrical pin;

the two cycloid rotor pumps are provided with the same oil inlet and oil outlet channels, a one-way valve is arranged in an oil channel of the first pump body, the pneumatic motor consists of a second pump cover, a semicircular key, an auxiliary shaft, a third pump cover, a motor shell, blades, a pneumatic motor rotor, an air inlet and an air outlet, the blades are uniformly distributed in a groove in the pneumatic motor rotor, and the blades of the pneumatic motor are tightly abutted to the inner wall of the pneumatic motor shell by centrifugal force;

and high-pressure gas in the high-pressure gas tank flows through the electromagnetic valve and the air inlet of the pneumatic motor through the pipeline and is discharged from the exhaust port.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the first pump cover, the first pump body, the partition plate, the second pump body, the second pump cover, the third pump cover and the motor shell are fixed into a whole by three bolts through threaded holes, and the threaded holes are only provided with threads on the first pump cover; the oil pump fixed integrally is fixed to the engine body by three bolts through bolt holes.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the cylindrical boss at the outer end of the first pump cover has the function of positioning the oil pump and the engine body.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: and the transmission gear at the outer end of the main shaft is used for power transmission between the oil pump and the engine.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the oil circuit relation between the cycloid rotor pumps A, B is parallel connection, namely the cycloid rotor pumps have the same oil inlet and outlet channels; in order to prevent the cycloid impeller pump a from operating and the impeller pump B from not operating, the pressure oil flows back from the impeller pump a to the impeller pump B and affects the oil intake of the impeller pump a, a check valve needs to be provided.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the difference between the diameter of the inner cavity of the one-way valve and the diameter of the ball body is the diameter of the oil port opening, and the purpose is to ensure that the circulation width of pressure engine oil is unchanged when the one-way valve is opened, and reduce the pressure fluctuation of the engine oil.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: when the vehicle key is ON, the ECU controls the opening of the electromagnetic valve, and the electromagnetic valve presets ten-second automatic closing time.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the compressed gas of the high-pressure gas tank comes from an air compressor driven by an engine when the vehicle runs.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: and compressed gas in the high-pressure gas tank is controlled by a solenoid valve to enter a gas inlet of the pneumatic motor.

As a preferred scheme of the cycloidal rotor pump structure of the integrated pre-lubrication type engine and the control method thereof, the invention comprises the following steps: the method comprises the following steps:

when the vehicle is ready to start, a driver turns ON a vehicle key, the ECU controls the electromagnetic valve to be opened, the pneumatic motor drives the oil pump to rotate at a high speed, and engine oil in the oil pan is pumped into an engine oil channel to perform engine starting pre-lubrication; after ten seconds, the electromagnetic valve is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil duct and between the friction pairs can meet the requirement of starting the engine; when the driver rotates the key to START, the engine is started by the starter motor, and the oil pump is driven by the engine to run, so that the lubricating pressure is continuously established for the lubricating system.

Compared with the prior art, the invention has the beneficial effects that:

1. the power source used in the pre-lubrication stage does not depend on the electric power of a vehicle storage battery, and the electric quantity of the storage battery in winter is not influenced;

2. the used pneumatic motor has stable work, the cost is lower than that of the motor, and the pneumatic motor can be started with load;

3. the check valve is arranged in the pump body of the oil pump, is well combined with the pump cover and the flow distribution surface thereof, has compact structure and smaller volume, can improve the space utilization rate, and is convenient to install and arrange on a vehicle.

4. The electromagnetic valve controlled by the ECU is used, the response is rapid, and the accuracy is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and 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 to obtain other drawings without inventive exercise. Wherein:

FIG. 1 is a cross-sectional view of an integrated pre-lubricated engine oil pump according to the present invention;

FIG. 2 is a schematic structural view of a section A-A and a section H-H of the pump cover of the oil pump shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a section B-B of the pump body of the oil pump shown in FIG. 1 and a section I-I of the check valve and the oil passage;

FIG. 4 is a schematic structural diagram of a section C-C of the oil pump partition plate shown in FIG. 1;

FIG. 5 is a schematic structural view of a D-D section of the pump body of the oil pump shown in FIG. 1;

FIG. 6 is a schematic structural diagram of an E-E section and an J-J section of the oil pump cover of the oil pump shown in FIG. 1;

FIG. 7 is a schematic structural diagram of a section F-F of the pneumatic motor of the oil pump of FIG. 1;

FIG. 8 is a schematic structural view of a section G-G of the oil pump cover shown in FIG. 1;

fig. 9 is a schematic diagram of electrical connections of the high pressure gas tank, solenoid valve, ECU, pneumatic motor and its air inlet.

In the figure; the pump comprises a first pump cover 1, a main shaft 2, a first pump body 3, a partition plate 4, a second pump body 5, a second pump cover 6, a semicircular key 7, an auxiliary shaft 8, a third pump cover 9, a motor shell 10, a first flow distribution surface 11, a bolt hole 12, a threaded hole 13, an oil passage 14, an outer rotor 15, an inner rotor 16, a first cylindrical pin 17, an outer rotor 18, an inner rotor 19, a second cylindrical pin 20, a second flow distribution surface 21, an exhaust port 22, a blade 23, a pneumatic motor rotor 24, an air inlet 25, a one-way valve 26, a high-pressure air tank 27, an ECU28 and an electromagnetic valve 29.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

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

The invention provides the following technical scheme: an integrated pre-lubrication type engine cycloid rotor pump structure and a control method thereof comprise a first pump cover 1, a main shaft 2, a first pump body 3, a partition plate 4, a second pump body 5, a second pump cover 6, a semi-circular key 7, an auxiliary shaft 8, a third pump cover 9, a motor shell 10, a first flow distribution surface 11, a bolt hole 12, a threaded hole 13, an oil duct 14, an outer rotor 15, an inner rotor 16, a first cylindrical pin 17, an outer rotor 18, an inner rotor 19, a second cylindrical pin 20, a second flow distribution surface 21, an exhaust port 22, a blade 23, a pneumatic motor rotor 24, an air inlet 25 and a one-way valve 26:

wherein

The outer side of the first pump cover 1 is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface 11, three bolt holes 12 and three threaded holes 13 are distributed, the cylindrical boss is used for positioning an oil pump and an engine body, the threaded holes 13 are used for connecting the whole oil pump into a whole, and the bolt holes 12 are used for fixing the oil pump on the engine body; the outer end of the main shaft 2 is provided with a transmission gear for power transmission between an oil pump and an engine, and the inner end of the main shaft is connected with an inner rotor 16 through a first cylindrical pin 17; the inner rotor 16 is internally meshed with the outer rotor 15, and forms a cycloid rotor pump A with the first pump cover 1, the main shaft 2, the first pump body 3, the partition plate 4 and the first cylindrical pin 17;

the inner side of the second pump cover 6 is a second flow distribution surface 21, and the outer side is a pneumatic motor; the outer end of the auxiliary shaft 8 is connected with a pneumatic motor rotor 24 through a semicircular key 7, and the inner end of the auxiliary shaft is connected with an inner rotor 19 through a second cylindrical pin 20; the inner rotor 19 is internally meshed with the outer rotor 18 and forms a cycloid rotor pump B with the partition plate 4, the second pump body 5, the second pump cover 6, the auxiliary shaft 8 and the second cylindrical pin 20;

the two cycloid rotor pumps are provided with the same oil inlet channel 14 and the same oil outlet channel 14, a one-way valve 26 is arranged in the oil channel 14 of the first pump body 3, the one-way valve consists of a steel ball, a spring and a spring base and prevents the backflow of engine oil, the pneumatic motor consists of a second pump cover 6, a semicircular key 7, an auxiliary shaft 8, a third pump cover 9, a motor shell 10, blades 23, a pneumatic motor rotor 24, an air inlet 25 and an air outlet 22, the blades 23 are uniformly distributed in grooves in the pneumatic motor rotor 24, and the blades 23 of the pneumatic motor are tightly abutted to the inner wall of the pneumatic motor shell 10 by centrifugal force;

the high-pressure gas in the high-pressure gas tank 27 is discharged from the exhaust port 22 after flowing through the solenoid valve 29 and the air motor intake port 25 via a pipe.

Specifically, a first pump cover 1, a first pump body 3, a partition plate 4, a second pump body 5, a second pump cover 6, a third pump cover 9 and a motor shell 10 are fixed into a whole by three bolts through threaded holes 13, and the threaded holes 13 are only provided with threads on the first pump cover 1; the oil pump fixed as one body is fixed to the engine body by three bolts through the bolt holes 12.

Specifically, the cylindrical boss at the outer end of the first pump cover 1 has the function of positioning the oil pump and the engine body.

Specifically, the transmission gear at the outer end of the main shaft 2 is used for power transmission between the oil pump and the engine.

Specifically, the oil paths between the gerotor pumps A, B are in parallel, i.e., have the same oil inlet and outlet passages 14; in order to prevent the pressure oil from flowing back from the gerotor pump a to the gerotor pump B when the gerotor pump a is operating but the gerotor pump B is not operating, and to affect the oil intake of the gerotor pump a, a check valve 26 needs to be provided.

Specifically, the difference between the diameter of the inner cavity of the check valve 26 and the diameter of the ball is the diameter of the oil port, so that the flowing width of the pressure engine oil is not changed when the check valve is opened, and the pressure fluctuation of the engine oil is reduced.

Specifically, when the vehicle key is ON, the ECU28 controls the opening of the electromagnetic valve 29, and the electromagnetic valve 29 presets the ten-second automatic closing time.

Specifically, the compressed gas in the high-pressure gas tank 27 is from an air compressor driven by an engine when the vehicle is running.

Specifically, the compressed air in the high-pressure air tank 27 is controlled by the electromagnetic valve 29 to enter the air inlet 25 of the air motor.

Specifically, the method comprises the following steps:

when the vehicle is ready to start, a driver turns ON a vehicle key, the ECU28 controls the electromagnetic valve 29 to be opened, the air motor drives the oil pump to rotate at a high speed, and the oil in the oil pan is pumped into the engine oil channel 14 to pre-lubricate the engine during starting; after ten seconds, the electromagnetic valve 29 is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil duct 14 and between the friction pairs can meet the requirement of starting the engine; when the driver rotates the key to START, the engine is started by the starter motor, and the oil pump is driven by the engine to run, so that the lubricating pressure is continuously established for the lubricating system.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an integrated prelubrication formula engine cycloid impeller pump structure which characterized in that: the pump comprises a first pump cover (1), a main shaft (2), a first pump body (3), a partition plate (4), a second pump body (5), a second pump cover (6), a semicircular key (7), an auxiliary shaft (8), a third pump cover (9), a motor shell (10), a first distributing surface (11), a bolt hole (12), a threaded hole (13), an oil duct (14), an outer rotor (15), an inner rotor (16), a first cylindrical pin (17), an outer rotor (18), an inner rotor (19), a second cylindrical pin (20), a second distributing surface (21), an exhaust port (22), blades (23), a pneumatic motor rotor (24), an air inlet (25), a one-way valve (26), a high-pressure air tank (27), an ECU (28) and an electromagnetic valve (29):

wherein

The outer side of the first pump cover (1) is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface (11), three bolt holes (12) and three threaded holes (13) are distributed, and the threaded holes (13) are used for connecting the whole oil pump into a whole; the outer end of the main shaft (2) is provided with a transmission gear, and the inner end of the main shaft is connected with the inner rotor (16) through a first cylindrical pin (17); the inner rotor (16) is internally meshed with the outer rotor (15) and forms a cycloid rotor pump A with the first pump cover (1), the main shaft (2), the first pump body (3), the partition plate (4) and the first cylindrical pin (17);

the inner side of the second pump cover (6) is a second flow distribution surface (21), and the outer side is an air motor; the outer end of the auxiliary shaft (8) is connected with a pneumatic motor rotor (24) through a semicircular key (7), and the inner end of the auxiliary shaft is connected with an inner rotor (19) through a second cylindrical pin (20); the inner rotor (19) is internally meshed with the outer rotor (18) and forms a cycloid rotor pump B with the partition plate (4), the second pump body (5), the second pump cover (6), the auxiliary shaft (8) and the second cylindrical pin (20);

the two cycloid rotor pumps are provided with the same oil inlet channel and the same oil outlet channel (14), a one-way valve (26) is arranged in an oil channel (14) of a first pump body (3), the pneumatic motor consists of a second pump cover (6), a semicircular key (7), an auxiliary shaft (8), a third pump cover (9), a motor shell (10), blades (23), a pneumatic motor rotor (24), an air inlet (25) and an air outlet (22), the blades (23) are uniformly distributed in grooves in the pneumatic motor rotor (24), and the blades (23) of the pneumatic motor are tightly abutted to the inner wall of the pneumatic motor shell (10) by centrifugal force;

high-pressure gas in the high-pressure gas tank (27) flows through the electromagnetic valve (29) and the air inlet (25) of the air motor through pipelines and then is discharged from the exhaust port (22).

2. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: the first pump cover (1), the first pump body (3), the partition plate (4), the second pump body (5), the second pump cover (6), the third pump cover (9) and the motor shell (10) are fixed into a whole by three bolts through threaded holes (13), and the threaded holes (13) are only provided with threads on the first pump cover (1); the oil pump fixed integrally is fixed to an engine body by three bolts through bolt holes (12).

3. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: the cylindrical boss at the outer end of the first pump cover (1) has the function of positioning the oil pump and the engine body.

4. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: and a transmission gear at the outer end of the main shaft (2) is used for power transmission between the oil pump and the engine.

5. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: the oil circuit relation among the cycloid rotor pumps A, B is parallel connection, namely the cycloid rotor pumps have the same oil inlet and outlet channels (14); in order to prevent the pressure oil from flowing back to the rotor pump B from the rotor pump A when the cycloid rotor pump A is operated and the rotor pump B is not operated, and influence the oil inlet of the rotor pump A, a check valve (26) is needed.

6. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: the difference between the diameter of the inner cavity of the one-way valve (26) and the diameter of the ball body is the diameter of the oil port opening, so that the flowing width of the pressure engine oil is unchanged when the one-way valve is opened, and the pressure fluctuation of the engine oil is reduced.

7. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: when the vehicle key is ON, the ECU28 controls the opening of the electromagnetic valve (29), and the electromagnetic valve (29) presets ten-second automatic closing time.

8. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: the compressed gas of the high-pressure gas tank (27) comes from an air compressor driven by an engine when the vehicle runs.

9. The integrated pre-lubricated engine gerotor pump structure of claim 1, wherein: compressed gas of the high-pressure gas tank (27) is controlled by an electromagnetic valve (29) to enter an air inlet (25) of the pneumatic motor.

10. The control method of an integrated prelubricated engine gerotor pump structure, as claimed in any of claims 1-9, wherein: the method comprises the following steps:

when the vehicle is ready to start, a driver turns ON a vehicle key, an ECU (28) controls an electromagnetic valve (29) to be opened, a pneumatic motor drives an oil pump to rotate at a high speed, and the oil in an oil pan is pumped into an engine oil channel (14) to perform engine starting pre-lubrication; after ten seconds, the electromagnetic valve (29) is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil duct (14) and between the friction pairs can meet the requirement of starting the engine; when the driver rotates the key to START, the engine is started by the starter motor, and the oil pump is driven by the engine to run, so that the lubricating pressure is continuously established for the lubricating system.