High pressure co-rail electric control fuel injection system

Abstract

The present invention belongs to a high-pressure common rail electrically-controlled fuel-injection system, and relates to a diesel engine fuel-injection system. Said invention is characterized by that on the basis of existent high-pressure common rail electrically-controlled fuel-injection system its high-pressure common rail pump and low-pressure oil circuit adopt the electrically-controlled high-pressure oil pump and low-pressure oil circuit in the non-high-pressure common rail electrically-controlled fuel-injection system, and the existent electrically-controlled high-pressure oil pump and low-pressure oil circuit can be properly improved according to the requirements of working characteristics of the high-pressure common roil electrically-controlled fuel-injection system.

Description

technical field [0001] The invention belongs to auto parts, and relates to a fuel injection system for a diesel engine, in particular to a high-pressure common rail electronically controlled fuel injection system. Background technique [0002] Today's automotive industry has higher and higher requirements for emission and economy. In order to improve the economy and emission of diesel engines, the high pressure of fuel injection and the flexibility of control are the inevitable development directions of fuel supply systems. Among them, high-voltage common rail Controlled fuel injection system is an important development direction of today's fuel injection system. [0003] In the existing high-pressure common rail electronically controlled fuel injection system for diesel engines, there is the following typical configuration (as shown in Figure 1): mainly composed of low-pressure oil circuit 6, high-pressure common-rail pump 1, high-pressure oil pipe 2, high-pressure fuel rai...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-pressure common rail electronically controlled fuel injection system, in order to solve the problem of the existing electronically controlled fuel injection system in the process of design and development of the high-pressure common rail electronically controlled fuel injection system and the modification of the existing diesel engine to the high-pressure common rail diesel engine. The problem of waste of injection system resources is to seek a faster and more economical high-pressure common rail electronically controlled fuel injection system design scheme that can maximize the use of existing electronically controlled fuel injection system resources and is suitable for China's diesel engine technology and product national conditions

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