A fuel supply system and control method for a natural gas engine with a return pipe

An engine and return pipe technology, applied in the charging system, combustion engine, engine components, etc., can solve the problems of poor dynamic response of natural gas engines, and achieve the effect of shortening the response time and improving the dynamic response.

Active Publication Date: 2021-07-20
HARBIN ENG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a natural gas engine fuel supply system and control method with a return pipe that can solve the problem of poor dynamic response of natural gas engines

Method used

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  • A fuel supply system and control method for a natural gas engine with a return pipe

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Embodiment Construction

[0013] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0014] combine figure 1 , the present invention is a natural gas engine fuel supply system with a return pipe, including a natural gas engine 13, a natural gas supply system, an air supply system, an electronic control system ECU12, and a diesel ignition system.

[0015] The natural gas supply system includes LNG storage tank 1, check valve 2, vaporizer 3, buffer tank 4, voltage stabilizer 5, and electronically controlled gas injector 10. Natural gas passes through check valve 2, vaporizer 3, buffer tank 4, and pressure stabilizer in sequence 5. The electronically controlled air injector 10 enters the air passage and mixes with air.

[0016] The electronic control system ECU12 is connected with the natural gas supply system, the diesel ignition system and the natural gas engine 13, and is used to monitor the natural gas, air and diesel flow, engine speed, torque,...

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Abstract

The object of the present invention is to provide a natural gas engine fuel supply system with a return pipe, including an LNG gas storage tank, a carburetor, an electronically controlled injector, a turbocharger, an engine, and an ECU, and the LNG gas storage tank is connected to the carburetor through a one-way valve , the carburetor is connected to the electronically controlled injector through the buffer tank and the voltage regulator, the outlet of the electronically controlled injector is connected to the air passage three, the exhaust pipe of the engine is connected to the turbine of the turbocharger, and the compressor outlet of the turbocharger is connected to the air passage 1. The two ends of airway two are respectively connected to airway one and airway three. The first end of the return pipe is connected to airway one, and the second end of the return pipe is connected to airway two. After airway two and airway three merge The intake pipe of the engine is connected through the throttle valve, a valve is set on the return pipe, and the fuel supply device is connected to the fuel injector, which is installed in the engine. The invention can respond quickly to the load change of the natural gas engine, recover the rotating speed faster, improve the dynamic response and shorten the response time.

Description

technical field [0001] The invention relates to an engine fuel supply system and a control method, in particular to a natural gas engine fuel supply system and a control method. Background technique [0002] Due to the extensive use of petroleum resources, serious environmental pollution has been caused. Therefore in order to improve and protect the environment. Liquefied natural gas, a clean energy source, has entered the scope of people's consideration. Natural gas has many advantages such as abundant storage, low cost, high energy density, low sulfur content, cleanliness and sanitation, and has become an ideal fuel for new energy internal combustion engines. [0003] At present, natural gas engines generally inject natural gas into the intake port, mix it with air, and then send it into the cylinder. The amount of natural gas injection is controlled by a solenoid valve, and the air flow is related to the supercharger. The ignition method is diesel ignited natural gas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02
CPCF02M21/0215F02M21/023F02M21/0239Y02T10/30
Inventor 丁宇徐珂达向拉
Owner HARBIN ENG UNIV
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