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Gasoline injection amount control method and system for dual-fuel engine

A dual-fuel engine and control method technology, applied in fuel injection control, engine control, combustion engine and other directions, can solve the problems of large influence and inaccurate control of gasoline fuel injection quantity, etc., to reduce THC emission and avoid excessive noise Effect

Active Publication Date: 2015-03-25
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the temperature in the cylinder has a great influence on the fuel injection quantity of gasoline, and the temperature in the cylinder is restricted by many factors, the above control method is still not accurate enough for the control of the fuel injection quantity of gasoline.

Method used

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  • Gasoline injection amount control method and system for dual-fuel engine

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Embodiment 1

[0050] This embodiment relates to a dual-fuel engine gasoline injection quantity control system, consisting of figure 1 As shown, it includes a main control unit 1 , a signal acquisition module 2 connected to the main control unit 1 and a gasoline injector 3 controlled by the main control unit 1 . Wherein, the main control unit 1 can adopt the vehicle ECU, and the gasoline injector 3 is arranged in the intake passage, and its structure and the control connection relationship with the main control unit 1 can adopt the conventional technology of the existing vehicle, so that The gasoline injector 3 injects gasoline into the engine cylinder under the control of the main control unit 1 .

[0051] The signal acquisition module 2 in this embodiment is used to acquire parameter information of the vehicle. In this embodiment, it includes an engine speed acquisition unit 201, a cycle intake air volume acquisition unit 202, an in-cylinder temperature acquisition unit 203, an EGR The ra...

Embodiment 2

[0056] This embodiment relates to a dual-fuel engine gasoline injection quantity control method, which is an optimal control method based on the dual-fuel engine gasoline injection quantity control system described in Embodiment 1. The main control idea of ​​this method is as follows Said:

[0057] Based on the current running state of the engine, obtain the corrected maximum allowable gasoline injection volume and minimum allowable gasoline injection volume according to the circulating intake air volume, engine speed, cylinder temperature and EGR rate;

[0058] If the current gasoline injection quantity is greater than the maximum allowable gasoline injection quantity, perform gasoline injection with the maximum allowable gasoline injection quantity; if the current gasoline injection quantity is less than the minimum allowable gasoline injection quantity, perform gasoline injection with the minimum allowable gasoline injection quantity injection; otherwise, gasoline injection...

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Abstract

The invention provides a gasoline injection amount control method for a dual-fuel engine. The method includes the following steps that the maximum permission gasoline injection amount and the minimum permission gasoline injection amount after correction are acquired based on the current operating state of the engine according to the circulation gas inlet amount, the engine revolution speed, the temperature inside a cylinder and the EGR rate; if the current gasoline injection amount is larger than the maximum permission gasoline injection amount, the maximum permission gasoline injection amount is used for executing gasoline injection; if the current gasoline injection amount is smaller than the minimum permission gasoline injection amount, the minimum permission gasoline injection amount is used for executing gasoline injection; otherwise, the current gasoline injection amount is used for executing gasoline injection. Meanwhile, the invention further relates to a gasoline injection amount control system for the dual-fuel engine. According to the technical scheme, the gasoline injection amount can meet the using requirement, gasoline can be burnt sufficiently, and THC emission is lowered; meanwhile, the phenomenon that the noise of the engine is too large is avoided, and the advantages of the dual-fuel engine can be performed to a greater extent.

Description

technical field [0001] The invention relates to a fuel injection control technology in a combustion engine, in particular to a method for controlling the gasoline injection quantity of a dual-fuel engine; meanwhile, the invention also relates to a control system for the gasoline injection quantity of a dual-fuel engine. Background technique [0002] As environmental problems and energy problems become more and more severe, internal combustion engines, as the main "consumers" of petroleum energy in the world, bear the brunt of special attention. The internal combustion engine is currently the most widely used power machine in the world, and it is irreplaceable in a short period of time. How to reduce the fuel consumption of the engine, make it more economical and more environmentally friendly, is the pursuit of the world's major automobile manufacturers in recent years. Target. [0003] Traditional engines are mainly divided into gasoline engines and diesel engines. Gasoline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02D41/30
CPCY02T10/30
Inventor 崔亚彬赖海鹏陈雄伟
Owner GREAT WALL MOTOR CO LTD
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