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Method, system and vehicle for determining diesel pre-injection quantity of dual-fuel engine

A dual-fuel engine and a technology to determine the method, which is applied to combustion engines, engine testing, charging systems, etc., can solve problems such as insufficient ignition energy, insufficient combustion, rough combustion, etc., to achieve accurate and reasonable pre-injection of diesel oil, avoid Insufficient combustion, avoid the effect of rough combustion

Active Publication Date: 2018-01-30
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

If too much pre-injection diesel is injected for ignition, the engine will deflagrate, burn rough, and nitrogen oxides NO X High emissions, if too little injection, insufficient ignition energy, high THC emissions, insufficient combustion, increased fuel consumption

Method used

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  • Method, system and vehicle for determining diesel pre-injection quantity of dual-fuel engine
  • Method, system and vehicle for determining diesel pre-injection quantity of dual-fuel engine
  • Method, system and vehicle for determining diesel pre-injection quantity of dual-fuel engine

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] figure 1 It is a flow chart of a method for determining a diesel pre-injection quantity of a dual-fuel engine according to an embodiment of the present invention. Wherein, in the description of the present application, the dual-fuel engine is a dual-fuel engine that injects gasoline in the port and performs pre-injection and main injection of diesel in the cylinder.

[0034] Such as figure 1 As shown, the fuel distribution method of a dual-fuel engine according to an embodiment of the present invention includes the following steps:

[0035] Step S101: When the dual-fuel engine is working in the dual-fuel mode, the basic oil quantity for diesel pre-injection is obtained accordin...

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Abstract

The present invention provides a method, system and vehicle for determining the amount of diesel pre-injection of a dual-fuel engine. fuel quantity; correct the basic fuel quantity of diesel pre-injection to obtain the total diesel pre-injection quantity; determine the minimum diesel pre-injection quantity according to the final gasoline quantity, engine speed and demand torque; if the total diesel pre-injection quantity is less than the minimum diesel pre-injection quantity Injection quantity, the minimum pre-injection quantity of diesel oil is regarded as the total pre-injection quantity of diesel; judge whether the difference between the total quantity of diesel oil and the minimum quantity of fuel injected by the needle valve of the injector during opening and closing is less than the total pre-injection quantity of diesel oil fuel injection quantity; if yes, the total diesel fuel quantity is taken as the final pre-injection diesel quantity, otherwise the total diesel pre-injection quantity is taken as the final pre-injection diesel quantity. The method of the invention has the advantages of accurate and reasonable pre-injection diesel quantity distribution, thereby reducing energy consumption and emission of tail gas pollutants.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method, a system and a vehicle for determining a diesel pre-injection quantity of a dual-fuel engine. Background technique [0002] 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 and reduce pollutant emissions is the goal pursued by automobile manufacturers. Traditional engines are mainly divided into gasoline engines and diesel engines. Gasoline engines have better emissions, but their fuel economy is poor due to their ignition methods. Diesel engines use compression combustion to ensure fuel economy, but the corresponding emissions of exhaust pollutants are relatively high. [0003] Therefore, the dual-fuel engine has received more and more attention. The dual-fuel engine is an engine that injects gasoline into the port and inje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B7/02F02M65/00
Inventor 崔亚彬卢丰翥赵伟博马帅营
Owner GREAT WALL MOTOR CO LTD
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