CN213870068U

CN213870068U - A two-stroke combustion control system and vehicle having the same

Info

Publication number: CN213870068U
Application number: CN202022066303.7U
Authority: CN
Inventors: 苏杭; 马瑞博; 李双清; 王瑞平
Original assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Royal Engine Components Co Ltd; Zhejiang Geely Power Train Co Ltd
Current assignee: Aurora Bay Ningbo Intelligent Technology Co ltd; Aurobay Technology Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-08-03
Anticipated expiration: 2030-09-18

Abstract

The utility model relates to a two-stroke combustion control system and have its vehicle, including oil tank, pipeline, first oil pump, second oil pump, heating device, sprayer and ECU, the sprayer sets up in the cylinder of engine, the pipe connection in the oil tank with between the sprayer, first oil pump, second oil pump and heating device set up in on the pipeline, the second oil pump sets up in one side that the oil tank was kept away from to first oil pump, and first oil pump, second oil pump and heating device link to each other with the ECU electrical property, and under ECU's control, first oil pump pumps fluid in the oil tank, and the second oil pump pressurizes for the fluid in the pipeline, and heating device is right fluid heating in the pipeline, so that fluid follows reach predetermined temperature and predetermined pressure during the sprayer blowout. Has the advantages that: the fuel atomization level is improved, the contact area of fuel and air is increased, the fuel and the air reaching the combustion chamber are quickly and uniformly mixed, the combustion is optimized, the heat efficiency of the engine is improved, and the fuel consumption and the emission are reduced.

Description

Two-stroke combustion control system and vehicle with same

Technical Field

The utility model relates to a two-stroke engine technical field especially relates to a two-stroke combustion control system and have its vehicle.

Background

Energy conservation and emission reduction become main targets of research and development of power industries of countries all over the world, and automobiles tend to develop new energy and electrification. The pure electric vehicle has the problem of short form mileage due to limited battery capacity, and the range extender is an important means for solving the problem of mileage endurance, so the pursuit of the range extender with high efficiency is the direction of efforts of various large main engine plants at present.

Compared with a four-stroke engine, the two-stroke engine has the advantages of higher efficiency, small size, light weight and low cost, and can meet various requirements of a whole vehicle on a range extender, but the traditional two-stroke engine has the defects of high oil consumption and poor emission, so the two-stroke engine with low emission and high efficiency needs to be researched.

The traditional two-stroke engine has no valve mechanism, the upper part of a piston is defined as a combustion chamber, air inlet and exhaust channels are all arranged on the wall of an air cylinder, the reciprocating motion of the piston is utilized to open and close pore channels arranged on the wall of the air cylinder to realize air inlet and exhaust, and scavenging is realized by acting and exhaust pressure difference. Because there is not the valve, advance the exhaust and be difficult to realize independent control, simultaneously because of the air vent all on the cylinder wall, structural constraint leads to the intake constantly can't freely adjust, often there is unburned combustible mixture gas along with the exhaust-gas discharge, reduces combustion efficiency, increases the oil consumption and increases simultaneously and discharges the pollution.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-stroke combustion control system and have its vehicle, this two-stroke combustion control system can realize dodging the boiling fuel and spray to improve the fuel atomization level, increase the area of contact of fuel and air, reach the rapid and homogeneous mixing of the fuel in the combustion chamber and air, thereby the fresh air outflow volume when reducing the scavenging improves engine thermal efficiency, fuel consumption reduction and discharges.

The utility model provides a two-stroke combustion control system, which comprises an oil tank, a pipeline, a first oil pump, a second oil pump, a heating device, an oil injector and an ECU, the fuel injector is arranged in a cylinder of the engine, the pipeline is connected between the fuel tank and the fuel injector, the first oil pump, the second oil pump and the heating device are arranged on the pipeline, the second oil pump is arranged on one side of the first oil pump far away from the oil tank, the first oil pump, the second oil pump and the heating device are electrically connected with the ECU, under the control of the ECU, the first oil pump pumps oil out of the oil tank, the second oil pump pressurizes the oil in the pipeline, the heating device heats the oil in the pipeline, so that the oil liquid reaches the preset temperature when sprayed out from the oil sprayer and reaches the preset pressure in the cylinder at the moment of combustion of the oil in the cylinder.

Further, still be provided with the high pressure oil rail in the pipeline, the high pressure oil rail set up in between second oil pump and the sprayer, heating device include with ECU electrical property linked to each other's oil rail heating device, oil rail heating device is right the high pressure oil rail heats.

Further, install on the high pressure oil rail with pressure sensor and oil rail temperature sensor that ECU electrical property links to each other, pressure sensor detects the oil pressure in the high pressure oil rail, oil rail temperature sensor detects the temperature of fluid in the high pressure oil rail.

Further, the heating device also comprises an oil injector heating device electrically connected with the ECU; the fuel injector heating device is arranged on the fuel injector; so as to heat the oil passing through the oil injector.

Furthermore, the end part of the oil sprayer is provided with an oil sprayer temperature sensor electrically connected with the ECU, and the oil sprayer temperature sensor detects the temperature of oil in the oil sprayer.

Further, install on the inner wall of cylinder with the continuous cylinder pressure sensor of ECU electrical property, cylinder pressure sensor detects the pressure in the cylinder at the twinkling of an eye of fluid burning.

Further, a one-way valve is arranged between the first oil pump and the second oil pump; and a filter is also arranged between the second oil pump and the oil tank.

Further, still be provided with the pressure regulating pipeline on the pipeline, the one end on pressure regulating pipeline is located the liquid outlet of first oil pump with between the inlet of second oil pump, the other end on pressure regulating pipeline with the oil tank links to each other be provided with the overflow valve on the pressure regulating pipeline.

Furthermore, the second oil pump and the heating device are arranged, so that the temperature of the oil mist sprayed out of the oil sprayer is 90-150 ℃, and the pressure in the cylinder is more than 10Mpa at the moment of oil combustion in the cylinder.

A vehicle comprises the two-stroke combustion control system.

The utility model provides a two-stroke combustion control system, the heating and the controlling means of setting realize sudden boiling fuel injection to improve the fuel atomization level, the area of contact of increase fuel and air reachs the rapid and homogeneous mixing of the fuel in the combustion chamber and air, optimizes the burning, and fresh air outflow when reducing the scavenging improves engine thermal efficiency, fuel reduction and discharges.

Drawings

Fig. 1 is a schematic diagram of an arrangement structure of a two-stroke combustion control system according to an embodiment of the present invention.

Fig. 2 is an enlarged structural view of a portion a in fig. 1.

The reference numerals and components referred to in the drawings are as follows:

1. oil tank

2. Pipeline

3. Pressure regulating pipeline

4. First oil pump

5. Filter

6. Overflow valve

7. One-way valve

8. Second oil pump

9. High-pressure oil rail

11. Oil sprayer

12. Cylinder block

13、ECU

14. Pressure sensor

15. Oil rail heating device

16. Heating device of oil injector

17. Oil rail temperature sensor

18. Temperature sensor of oil sprayer

19. Cylinder pressure sensor

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Fig. 1 is a schematic view of an arrangement structure of a two-stroke combustion control system according to an embodiment of the present invention, and fig. 2 is an enlarged structure view of a portion a in fig. 1. Referring to fig. 1 and 2, the two-stroke combustion control system includes an oil tank 1, a pipeline 2, a first oil pump 4, a second oil pump 8, a heating device, an oil injector 11 and an ECU13, the oil injector 11 is disposed in a cylinder 12 of an engine, the pipeline 2 is connected between the oil tank 1 and the oil injector 11, the first oil pump 4, the second oil pump 8 and the heating device are disposed on the pipeline 2, the second oil pump 8 is disposed on a side of the first oil pump 4 away from the oil tank, the first oil pump 4, the second oil pump 8 and the heating device are electrically connected with the ECU13, under the control of the ECU13, the first oil pump 4 pumps oil out of the oil tank 1, the second oil pump 8 pressurizes oil in the pipeline 2, and the heating device heats the oil in the pipeline 2 to enable the oil to reach a predetermined temperature, such as 90 ℃ -150 ℃ when the oil is sprayed from the oil injector 11; the oil in the cylinder 12 is burnt to reach a predetermined pressure, such as more than 10 MPa.

A high-pressure oil rail 9 is further arranged in the pipeline 2, the high-pressure oil rail 9 is arranged between the second oil pump 8 and the oil injector 11, and high-pressure oil pumped out from the second oil pump 8 enters the oil injector 11 after passing through the high-pressure oil rail 9; the heating device comprises an oil rail heating device 15 electrically connected with the ECU13, and the oil rail heating device 15 heats the high-pressure oil rail 9 to ensure that the temperature of oil in the high-pressure oil rail 9 is 30-150 ℃. In addition, a pressure sensor 14 and a rail temperature sensor 17 which are electrically connected with the ECU13 are further installed on the high-pressure rail 9, the pressure sensor 14 detects the oil pressure in the high-pressure rail 9, and the rail temperature sensor 17 detects the temperature of the oil in the high-pressure rail 9.

It should be noted that, under the action of the second oil pump 8, the oil pressure in the high-pressure oil rail 9 can reach 350bar at most.

Further, the heating device also comprises an injector heating device 16 electrically connected with the ECU 13; the injector heating device 16 is disposed on the injector 11; so as to heat the oil passing through the oil injector 11 to reach the temperature of 90-150 ℃. An injector temperature sensor 18 electrically connected to the ECU13 is mounted at an end of the injector 11, and the injector temperature sensor 18 detects the temperature of the oil in the injector 11.

A cylinder pressure sensor 19 electrically connected with the ECU is installed on the inner wall of the cylinder 12, and the cylinder pressure sensor 19 detects the pressure of the oil in the cylinder 12 at the moment of combustion.

Further, a check valve 7 is provided between the first oil pump 4 and the second oil pump 8 to prevent the oil from flowing backward; a filter 5 is also provided between the second oil pump 8 and the oil tank 1, and in fig. 1, the filter 5 is provided between the first oil pump 4 and the check valve 7. It should be noted that the filter 5 is designed to make the oil more pure when the second oil pump 8 is pressurized.

Still be provided with pressure regulating pipeline 3 on pipeline 2, the one end of pressure regulating pipeline 3 is located between the liquid outlet of first oil pump 4 and the inlet of second oil pump 8, specifically is between the liquid outlet of first oil pump 4 and filter 5, and the other end of pressure regulating pipeline 3 links to each other with oil tank 1, install overflow valve 6 on the pressure regulating pipeline 3, overflow valve 6 has guaranteed that pipeline 2's invariable low pressure is supplied with.

Referring to fig. 1, the operation of the two-stroke combustion control system:

for the system, after the whole vehicle is electrified, the ECU13 detects that various signals are fed back normally, and then low-pressure oil supply is started; the low pressure supply is pumped out through the first oil pump 4 and into the pipeline 2, the overflow valve 6 regulates the pressure in the pipeline 2, and when the pressure is too high, constant low pressure supply is ensured through the overflow valve 6. The pumped oil is filtered by the filter 5 and then enters the second oil pump 8 through the check valve 7. After the engine is started, the second oil pump 8 is driven by the air inlet camshaft to start working, high-pressure oil pressure (maximum pressure of 350bar) is established, high-pressure oil pumped from the second oil pump 8 enters the high-pressure oil rail 9, the oil flowing through the high-pressure oil rail 9 enters the oil injector 11 and is injected into the cylinder body 12, meanwhile, the oil rail heating device 15 and the oil injector heating device 16 are started, and fuel oil is preheated (at the temperature of 30-150 ℃) by heating the high-pressure oil rail 9 and the oil injector 11, so that the fuel oil in the oil rail can quickly reach an overheating state. The temperature of the high-pressure oil rail 9 and the temperature of the oil rail temperature sensor 17 and the oil injector temperature sensor 18 which are arranged on the oil injector 11 are monitored, the pressure of the high-pressure oil rail 9 is monitored through the pressure sensor 14, and the pressure in the cylinder is monitored through the cylinder pressure sensor 19. So that the whole meets the formation condition of flash boiling spray, and further, when fuel oil is sprayed into a combustion chamber through the fuel injector 11, a flash boiling spray effect is generated. The conditions for forming the flash-boiling spray effect are as follows: when the oil is sprayed out from the oil sprayer 11, the temperature of the oil reaches 90-150 ℃, and the pressure in the cylinder reaches at least 10MPa at the moment of oil combustion in the cylinder 12.

Compared with the conventional fuel oil spray, the flash boiling spray has shorter spray penetration distance, larger spray near cone angle and smaller Sott average diameter (SMD), the spray characteristics are favorable for the quick atomization of the fuel oil in the combustion chamber, the contact area of the fuel oil and the air is increased, the fuel oil and the air reaching the combustion chamber are quickly and uniformly mixed, combustible mixed gas with proper concentration is formed near a spark plug electrode, the combustion is optimized, the combustion is sufficient, the fresh air overflow amount during scavenging is further reduced, the CH (hydrocarbon) emission is reduced, the engine oil dilution is reduced, the soot generation and emission are simultaneously reduced, and therefore the purposes of improving the heat efficiency of an engine, reducing the oil consumption and discharging are achieved.

A vehicle comprises the two-stroke combustion control system.

Based on the above description, the utility model discloses the advantage lies in:

1. after the utilization is washed the boiling and is sprayed, the spraying runs through apart from reducing, reduces the wet wall phenomenon to reduce the CH that causes among the scavenging process and discharge, reduce the machine oil and dilute, strengthen simultaneously that the fuel atomization mixes and evaporation rate, reduce soot and generate and discharge, improve the gas mixture temperature to a certain extent, be favorable to spark plug ignition and flame to propagate rapidly.

2. The lower oil spraying pressure is adopted, so that the cost can be reduced, and the reliability can be improved.

3. The utility model discloses two-stroke combustion control system is provided with temperature sensor, pressure sensor, and then carries out accurate control to this system fuel heating device, guarantees that the durability reduces the fault rate.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A two-stroke combustion control system, characterized in that the two-stroke combustion control system comprises an oil tank (1), a pipeline (2), a first oil pump (4), a second oil pump (8), a heating device, a spray An oil device (11) and an ECU (13), the oil injector (11) is arranged in the cylinder (12) of the engine, and the pipeline (2) is connected to the oil tank (1) and the oil injector ( 11), the first oil pump (4), the second oil pump (8) and the heating device are arranged on the pipeline (2), and the second oil pump (8) is arranged on the first oil pump (8). An oil pump (4) is away from the side of the oil tank, the first oil pump (4), the second oil pump (8) and the heating device are electrically connected to the ECU (13), and the ECU (13) is electrically connected to the oil pump (4). Under the control of (13), the first oil pump (4) pumps the oil out of the oil tank (1), and the second oil pump (8) pressurizes the oil in the pipeline (2), so The heating device heats the oil in the pipeline (2), so that the oil reaches a predetermined temperature when sprayed from the fuel injector (11) and reaches a predetermined pressure in the cylinder at the moment of combustion of the fuel in the cylinder (12).

2. The two-stroke combustion control system according to claim 1, characterized in that: the pipeline (2) is further provided with a high-pressure oil rail (9), and the high-pressure oil rail (9) is arranged on the second oil pump (8) Between the fuel injector (11) and the fuel injector (11), the heating device includes an oil rail heating device (15) electrically connected to the ECU (13), and the oil rail heating device (15) is responsible for the high pressure The oil rail (9) is heated.

3 . The two-stroke combustion control system according to claim 2 , wherein a pressure sensor ( 14 ) electrically connected to the ECU ( 13 ) and an oil rail temperature are installed on the high-pressure fuel rail ( 9 ). 4 . A sensor (17), the pressure sensor (14) detects the oil pressure in the high pressure oil rail (9), and the oil rail temperature sensor (17) detects the temperature of the oil in the high pressure oil rail (9).

4. The two-stroke combustion control system according to claim 2, wherein the heating device further comprises a fuel injector heating device (16) electrically connected to the ECU (13); the fuel injector A heating device (16) is arranged on the fuel injector (11); to heat the oil passing through the fuel injector (11).

5. The two-stroke combustion control system according to claim 3, wherein an injector temperature sensor (18) electrically connected to the ECU (13) is installed at the end of the fuel injector (11). ), the fuel injector temperature sensor (18) detects the temperature of the oil in the fuel injector (11).

6. The two-stroke combustion control system according to claim 1, wherein a cylinder pressure sensor (19) electrically connected to the ECU (13) is installed on the inner wall of the cylinder (12), and the cylinder A pressure sensor (19) detects the pressure at the moment of combustion of the oil in the cylinder (12).

7. The two-stroke combustion control system according to claim 1, characterized in that: a check valve (7) is further provided between the first oil pump (4) and the second oil pump (8); A filter (5) is also arranged between the second oil pump (8) and the oil tank (1).

8. The two-stroke combustion control system according to claim 1, characterized in that: the pipeline (2) is further provided with a pressure regulating pipeline (3), and one end of the pressure regulating pipeline (3) is located at the Between the liquid outlet of the first oil pump (4) and the liquid inlet of the second oil pump (8), the other end of the pressure regulating pipeline (3) is connected to the oil tank (1), where the An overflow valve (6) is arranged on the pressure regulating pipeline (3).

9. The two-stroke combustion control system according to claim 1, wherein the second oil pump (8) and the heating device are arranged so that the temperature of the oil mist sprayed from the fuel injector (11) is When the temperature is 90°C-150°C, the pressure reached in the cylinder at the moment of combustion of the fuel in the cylinder (12) is greater than 10Mpa.

10. A vehicle, characterized by comprising the two-stroke combustion control system according to any one of claims 1 to 9.