CN113775447A

CN113775447A - Jet engine in cylinder

Info

Publication number: CN113775447A
Application number: CN202111069067.7A
Authority: CN
Inventors: 陈金业; 陈海雁; 钱伟明; 倪强; 章传西
Original assignee: Anqing Flex Power Technology Co Ltd
Current assignee: Anqing Flex Power Technology Co Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2021-12-10

Abstract

The invention discloses an in-cylinder jet engine which comprises a cylinder body, a cylinder cover, a high-pressure jet device and a high-pressure air storage tank, wherein the high-pressure jet device is arranged on the cylinder cover and is used for providing combustible gas into a cylinder, and the high-pressure air storage tank is connected with the high-pressure jet device. According to the in-cylinder jet engine disclosed by the invention, the air inflow required by the engine under various working conditions can be accurately controlled, the air inlet efficiency can be improved by injecting air into the cylinder at high pressure, and the performance of the engine is improved.

Description

Jet engine in cylinder

Technical Field

The invention belongs to the technical field of engines, and particularly relates to an in-cylinder jet engine.

Background

In a valve actuating mechanism of a common engine, a valve is driven by a crankshaft of the engine through a camshaft, and the valve actuating timing of the valve depends on the rotation angle of the camshaft. When the engine is running, more fresh air needs to enter the combustion chamber, and the exhaust gas can be discharged out of the combustion chamber as much as possible. Thus, between the intake stroke and the exhaust stroke, there occurs a case where the intake valve and the exhaust valve are simultaneously opened, and such an overlap between the intake valve and the exhaust valve is referred to as a valve overlap angle. On a common engine, the opening and closing time of an intake valve and an exhaust valve is fixed, the valve overlap angle is also fixed, and the optimal valve timing obtained according to experiments cannot be changed in the engine operation process. However, the high and low engine speeds have an influence on the intake and exhaust gas flows and the in-cylinder combustion process. When the rotating speed is high, the flow rate of the intake air flow is high, and the inertia energy is large, so that the intake valve is expected to be opened earlier and closed later, so that the fresh air is smoothly charged into the cylinder, and some mixed gas or air is added as much as possible. On the contrary, when the rotating speed of the engine is low, the air inlet flow speed is low, the flow inertia energy is small, if the air inlet valve is opened too early, because the piston moves upwards to exhaust, fresh air is easily extruded out of the air cylinder, so that the air inlet is reduced, and the engine works unstably. Therefore, no fixed valve overlap angle setting can lead the engine to output perfectly at high and low rotating speeds, and if no variable valve timing technology exists, the engine can only select the optimized fixed valve overlap angle according to the requirements of the matched vehicle type. The variable valve distribution technology solves the contradiction by realizing the variable valve superposition angle through a technical means.

The variable valve timing technology is divided into two categories, namely variable valve timing and variable valve stroke. The variable distribution can make the valve intake and exhaust few points at low speed and intake and exhaust multiple points at high speed, thus the supplied fuel is not wasted and not lacked, the combustion is more complete, and the variable distribution has advantages of power, oil saving and emission. The engine is provided with higher air intake and exhaust efficiency under various working conditions and rotating speeds. The oil consumption level is also reduced while the power is improved. The engine has the advantages of taking into account different working conditions of high speed and low speed, improving the dynamic property and the economical efficiency of the engine, reducing the emission of the engine, and improving the performance and the stability of the engine at idle speed and low speed. Although the variable air distribution technology greatly helps to improve the performance of the engine, the variable air distribution technology does not achieve accurate air distribution control, and meanwhile, the variable air distribution technology is complex in structure and complicated in control procedure. The degree of improvement in engine performance is limited.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an in-cylinder jet engine, and aims to realize accurate control of air inlet time and air inlet amount of the engine and improve the performance of the engine.

In order to achieve the purpose, the invention adopts the technical scheme that: jet engine in jar includes cylinder body, cylinder cap, set up in on the cylinder cap and be used for providing combustible gas's high-pressure gas injection device and the high-pressure gas holder of being connected with high-pressure gas injection device in the cylinder.

And the gas outlet of the high-pressure gas storage tank is connected with the high-pressure gas injection device through a high-pressure gas outlet pipe, and a pressure gauge is arranged at the gas outlet of the high-pressure gas storage tank.

And an air inlet of the high-pressure air storage tank is connected with a high-pressure air inlet pipe, and the high-pressure air inlet pipe is connected with a gas booster pump.

The gas booster pump is connected with the air filter.

The air inflow required by the engine under various working conditions can be accurately controlled, and the air inflow efficiency can be improved by injecting air into the cylinder at high pressure. Meanwhile, the variable valve mechanism, the throttle valve body and parts related to supercharging and air intake of the existing engine can be reduced. The invention can ensure that the air quantity required by each combustion in the engine cylinder is calculated by the ECU and then controls the high-pressure air injection device to be accurately injected into the cylinder, and the high-efficiency and accurate air intake mode can greatly improve the dynamic property and the fuel economy of the engine.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic view of the arrangement of an in-cylinder jet engine and associated accessories of the present invention;

FIG. 2 is a schematic view of an in-cylinder jet engine assembly according to the present invention;

labeled as: 1. a piston; 2. a cylinder body; 3. a cylinder cover; 4. a high pressure fuel injector; 5. a high-pressure air outlet pipe; 6. a high pressure air injection device; 7. a spark plug; 8. an exhaust valve; 9. an exhaust passage; 10. a combustion chamber; 11. an ECU (engine control unit); 12. an air outlet; 13. a pressure gauge; 14. a high pressure gas storage tank; 15. an air inlet; 16. a high-pressure air inlet pipe; 17. a gas booster pump; 18. an air inlet pipe of the booster pump; 19. an air cleaner; 20. and (5) air filtering and air inlet pipes.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 and 2, the present invention provides an in-cylinder jet engine, which includes a cylinder block 2, a cylinder head 3, a piston 1, a high-pressure fuel injector 4, a spark plug 7, an exhaust valve 8, a high-pressure jet device 6 disposed on the cylinder head 3 and used for providing combustible gas into the cylinder, and a high-pressure gas storage tank 14 connected to the high-pressure jet device 6. The gas required by the engine is provided by the high-pressure jet device 6, the high-pressure jet device 6 is electrically connected with the ECU11, and the ECU11 controls the opening and closing time of the high-pressure resistant jet device 6, so that the air inlet time and the air inlet amount of the engine are accurately controlled, and the engine always works in the optimal oil-gas mixing state. The air intake mode can eliminate the pumping loss of the engine and improve the scavenging efficiency of the engine; the air inlet time and the air inlet amount of the engine are accurately controlled, so that the engine can burn more completely, the emission control is more accurate, and the engine performance is higher.

Specifically, as shown in fig. 1 and 2, an air outlet 12 of a high-pressure air storage tank 14 is connected with a high-pressure air injection device 6 through a high-pressure air outlet pipe 5, the air outlet 12 of the high-pressure air storage tank 14 is provided with a pressure gauge 13, and the pressure gauge 13 is used for monitoring the pressure of combustible gas entering the high-pressure air outlet pipe 5. The high-pressure air injection device 6 is a high-temperature-resistant air inlet nozzle, and the opening and closing of the high-pressure air injection device are controlled by the ECU 11. One end of the high-pressure air outlet pipe 5 is connected with an air outlet 12 of the high-pressure air storage tank 14, and the other end of the high-pressure air outlet pipe 5 is connected with an air inlet end of the high-temperature-resistant air inlet nozzle. The ECU11 accurately controls the opening and closing time of the high-temperature-resistant air inlet nozzle according to the requirements of the engine so as to ensure the accuracy of the air quantity required by the operation of the engine. The proper direction of the high-temperature and high-pressure resistant nozzle is selected, and the air flow formed when the nozzle injects air into the cylinder can better drive the fuel oil injected into the cylinder to flow, so that the oil and gas are mixed more uniformly.

As shown in fig. 1 and 2, the high-pressure gas tank 14 has an inlet 15 connected to a high-pressure inlet pipe 16, the high-pressure inlet pipe 16 connected to a gas booster pump 17, and the gas booster pump 17 connected to an air cleaner 19. The air filter 19 guides the gas required by the engine into the gas booster pump 17, and the gas booster pump 17 compresses the gas and joins the gas into the high-pressure gas storage tank 14. The high-pressure air storage tank 14 is provided with a pressure gauge 13, and different pressures can be guaranteed to be maintained in the high-pressure air storage tank 14 according to the requirement of the rotating speed of the engine.

As shown in fig. 1 and 2, the gas enters the air cleaner 19 through the air filter inlet pipe 20, is purified by the air cleaner 19, and is guided to the gas booster pump 17 through the booster pump inlet pipe 18. The gas booster pump 17 boosts the pressure of the gas and stores the gas in the high-pressure gas tank 14. The gas required for each operation of the engine is supplied from a high pressure gas tank 14. The ECU11 controls the high-pressure gas injection device 6, opens the high-temperature and high-pressure resistant nozzle, and injects gas into the cylinder, and the amount of gas injected into the cylinder each time is accurately calculated and controlled by the ECU 11. The fuel required by the engine is also injected through the high-pressure fuel injection nozzle. The injected high pressure gas and high pressure fuel can increase the mixing rate of the air and the fuel, so that the air and the fuel are mixed more uniformly.

As shown in FIG. 1, the exhaust valve 8 and the exhaust passage 9 can be opened by a camshaft according to the engine operation demand to control the opening time and the valve opening of the exhaust valve 8. The exhaust duct 9 leads the burned waste out of the cylinder.

The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. Jet engine in jar, including cylinder body and cylinder cap, its characterized in that: the high-pressure gas injection device is arranged on the cylinder cover and used for providing combustible gas for the cylinder, and the high-pressure gas storage tank is connected with the high-pressure gas injection device.

2. The in-cylinder jet engine of claim 1, characterized in that: and the gas outlet of the high-pressure gas storage tank is connected with the high-pressure gas injection device through a high-pressure gas outlet pipe, and a pressure gauge is arranged at the gas outlet of the high-pressure gas storage tank.

3. The in-cylinder jet engine according to claim 1 or 2, characterized in that: and an air inlet of the high-pressure air storage tank is connected with a high-pressure air inlet pipe, and the high-pressure air inlet pipe is connected with a gas booster pump.

4. The in-cylinder jet engine of claim 3, characterized in that: the gas booster pump is connected with the air filter.