A gas dual injection system and injection control method for improving dynamic response of marine dual fuel engine
A dual-fuel engine, dynamic response technology, applied in the direction of fuel injection control, engine control, combustion engine, etc., can solve the problems of difficulty in realizing the function of rapid gas stop and gas supply for each cylinder, poor engine response, and poor dynamic characteristics, and achieve improvement. Cold start effect, improved combustion quality, reduced exhaust temperature effect
Active Publication Date: 2022-04-05
HARBIN ENG UNIV
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Problems solved by technology
However, the range of working conditions is small, limited by knocking at high loads, and the dynamic characteristics are poor
This fuel injection method makes the response of the engine poor, and it is difficult to realize the function of quickly stopping the gas supply of each cylinder
Method used
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[0024] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0025] combine figure 1 , the present invention is a gas dual-injection system for improving the dynamic response of a marine dual-fuel engine, comprising an intake manifold 1, a throttle valve 2, a low-pressure gas injection valve 3, an intake manifold 4, a high-pressure gas injection valve 5, a pilot diesel injection Valve 6, exhaust system 7, spherical combustion chamber 8, piston 9. The combustion chamber is composed of the upper surface of the piston, the peripheral wall of the cylinder liner and the lower surface of the cylinder head. The single-point low-pressure gas injection valve 3 is installed in the intake manifold, the high-pressure gas injection valve 5 is installed in the cylinder head, and the pilot diesel injector 6 is installed in the cylinder head. inside the cylinder head.
[0026] The low-pressure gas injection valve 3 and the high-pressure ...
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The object of the present invention is to provide a kind of fuel gas dual-injection system and its injection control method for improving the dynamic response of marine dual-fuel engines, including cylinder head, cylinder block and piston, forming a spherical combustion chamber between the cylinder head, cylinder block and piston, and cylinder The cover is equipped with intake manifold, high-pressure gas injection valve, and pilot diesel injection valve. The intake manifold is connected to the intake manifold, and a throttle valve is set at the connection between the intake manifold and the intake manifold. A low-pressure gas injection valve is arranged inside, and a high-pressure gas injection valve and a pilot diesel injection valve are located above the spherical combustion chamber. The two gas injection valves of the present invention work together according to different working conditions, thereby realizing high-efficiency and low-emission combustion of the dual-fuel engine, accelerating flame propagation speed, shortening combustion time, improving combustion quality, reducing exhaust temperature, and improving misfire of the dual-fuel engine and knocking problems.
Description
technical field [0001] The invention relates to an engine and its control method, in particular to a dual-fuel engine and its control method. Background technique [0002] With the stricter emission regulations, in order to improve and protect the environment, natural gas has gradually become an alternative fuel for traditional diesel engines due to its high calorific value, clean emissions, and large reserves. [0003] The normal pressure ignition temperature of natural gas is about 600-650°C, which is much higher than that of diesel (about 280°C). It is difficult to ignite and burn directly by compression ignition. Generally, it is ignited by diesel or a spark plug. [0004] The air intake is controlled by the throttle valve, and the pumping loss at part load reduces the mechanical efficiency. [0005] At present, the existing dual-fuel engines are all single gas injection valves, and the gas intake method is intake manifold injection or direct injection in the intake por...
Claims
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IPC IPC(8): F02B69/04F02B23/06F02D41/00F02D41/06F02D41/30F02D41/32F02D41/38F02F3/28F02M21/02F02M61/14
CPCF02B69/04F02B23/0675F02M21/0275F02M21/0278F02M61/14F02D41/0025F02D41/064F02D41/0027F02D41/3094F02D41/32F02D41/38F02F3/28Y02T10/12Y02T10/30
Inventor 丁宇贲虹凯向拉徐珂达
Owner HARBIN ENG UNIV