Multipoint sequential injection control system of gas fuel

A sequential injection, gas fuel technology, applied in the direction of fuel injection control, electrical control, charging system, etc., can solve the problems of low intake pressure, poor adaptability to different working conditions, inability to achieve rapid correction, etc., to reduce exhaust emissions, Improves consistency, eliminates gas flashback and fuel waste

Inactive Publication Date: 2006-02-08
HEBEI UNIV OF TECH
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Problems solved by technology

[0003] The above inventions have the following disadvantages: 1. The electronic control unit is not a closed-loop self-learning system, which cannot be quickly correct

Method used

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  • Multipoint sequential injection control system of gas fuel
  • Multipoint sequential injection control system of gas fuel
  • Multipoint sequential injection control system of gas fuel

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Embodiment Construction

[0022] Such as figure 1 Shown: 1~4. Gas injection valve; 5~8. Cremation plug; 9. Gas fuel gas supply equipment; 10. Electronic igniter; 11. Throttle valve; 12. Gas pressure regulating valve; 13. Gas pressure sensor ;14. Gas temperature sensor; 15. Idle air control valve; 16. Throttle position sensor; 17. Crankshaft position sensor; 18. Oxygen sensor; 19. Speed ​​sensor; 20. Intake pressure sensor; 21. Coolant temperature sensor ; 22. Intake air temperature sensor; 23. Electronic control unit ECU; 24. Gas rail.

[0023] This set of gas fuel multi-point sequential injection control system is mainly composed of sensors, closed-loop control unit ECU and actuators. This set of control system can be widely used in various gas fuel engines, such as natural gas (NG), liquefied natural gas (LNG) , liquefied petroleum gas (LPG) and other gas engines; and can be applied to various engines with 4 to 12 cylinders and unlimited cylinder diameters. This patent takes an in-line four-cylinde...

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Abstract

The enclosed loop control system for gas fuel to jet successively in several points includes three parts of sensors, enclosed control unit (ECU) and executing mechanism. The sensors collects signals and transmits the signals to the ECU, the ECU performs precise calculation to control the operation of the executors, and the executors perform the timely and quantitative fuel jetting. In the enclosed loop control system, the ECU compares the data the oxygen sensor obtains with target value, and performs self correction and feedback correction to raise air/fuel ratio controlling precision. The timely and quantitative gas supply can eliminate fuel gas backing and fuel waste caused by gas valve superposing angle, raise the mixed gas uniformity and work homogeneity of the cylinders, improve the mixed gas controlling precision of the engine and reduce tail gas exhaust.

Description

technical field [0001] The invention relates to a gas vehicle fuel injection control system, in particular to a gas fuel multi-point sequential injection closed-loop control system. Background technique [0002] Chinese patent CN1443935A discloses a multi-point sequential injection system for liquefied petroleum gas for vehicles. It is a multi-point sequential injection system for liquefied petroleum gas for vehicles, including a gas channel system and a control system. It is characterized in that: in the gas channel system, there are Two filters for liquid phase and gas phase and a gas distributor with N high-speed gas solenoid valves. In the control system, it contains the first and second two computer blocks, two vacuum sensors, sensor group and fault diagnosis instrument. Sufficient data collected by the second computer block is processed, and the basic pulse width of the output gas jet is obtained and sent to the first computer block, and then the final pulse width sig...

Claims

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Application Information

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IPC IPC(8): F02D41/30F02D41/14F02M21/02
CPCY02T10/32Y02T10/30
Inventor 黎苏李西秦张铁臣牟连嵩
Owner HEBEI UNIV OF TECH
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