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Automobile fuel injection control system and method

A technology of a control system and a control method, applied in the directions of fuel injection control, electrical control, engine control, etc., can solve problems such as low temperature cold start reliability affecting spark plug life, spark plug carbon deposition, affecting production efficiency, etc., and achieve safe and reliable pre-pumping. Effects of oil and pre-injection control, carbon reduction, and life extension

Active Publication Date: 2015-11-18
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the vehicle needs to be started many times before it can be successfully started, which affects the production efficiency; at the same time, during the multiple starts of the engine, due to insufficient combustion, the spark plug has serious carbon deposits, which affects the life of the spark plug and the reliability of low-temperature cold start.

Method used

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  • Automobile fuel injection control system and method
  • Automobile fuel injection control system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Automotive fuel injection control systems, such as figure 1 As shown, including pre-injection control module, NVRAM (Non-VolatileRandomAccessMemory, non-volatile random access memory), fuel pump and fuel injector fault diagnosis module, timing start module, pre-injection flag flashing module;

[0041] The NVRAM is provided with a pre-spray flag, and the initial state of the pre-spray flag is 0;

[0042] The oil pump and fuel injector fault diagnosis module is used to output the oil pump or fuel injector fault signal;

[0043]The timing start module is used to output the start timing start signal; it can be, when the electric signal of the brake pedal position is higher than a brake threshold value, output the start timing start signal; it can also be, when the front headlight circuit is connected, Output the start timing start signal; it can also output the start timing start signal when the flashing warning light circuit is turned on;

[0044] The pre-spray flag writ...

Embodiment 2

[0051] Automotive fuel injection control methods, such as figure 2 shown, including the following steps:

[0052] 1. In an NVRAM, set the pre-spray flag, the initial state of the pre-spray flag is 0;

[0053] 2. If the pre-injection flag is in 0 state, the engine speed is 0, and the oil pump or fuel injector is not faulty, then proceed to step 3, otherwise proceed to step 5;

[0054] 3. If within the first time after starting the timing, the electric signal of the throttle opening is higher than the opening threshold value one or more times (such as twice), and the last time the electric signal of the throttle opening is higher than the If the duration of the opening threshold is greater than the second time, and the second time is less than the first time, then control the oil pump to pre-pump oil and control the fuel injector to pre-inject oil, and proceed to step 4; otherwise, proceed to step 5;

[0055] 4. After the pre-injection time of the injector reaches the third t...

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Abstract

The invention discloses an automobile oil injection control system, which comprises a pilot oil injection control module, a non-volatile random access memory (NVRAM), a timing start module and a pilot injection mark position refresh module. The invention also discloses an automobile oil injection control method. The operation of an oil pump and an oil injector is controlled by acquiring and determining operating action of an accelerator pedal, so that fuel is effectively and accurately injected into an air inlet passage or a cylinder, and a new automobile can be successfully started easily and conveniently at one time at first; the pilot oil pumping or pilot oil injection function can be realized only by an engine controller provider, and the system is easy to implement and low in cost; and moreover, after the pilot oil pumping or pilot oil injection function is successfully realized at first, the function is locked, false triggering of the pilot oil pumping or pilot oil injection function is well avoided, and the pilot oil pumping or pilot oil injection operation of an engine oil way can be safely and reliably controlled when the automobile leaves the assembly line.

Description

technical field [0001] The invention relates to automobile technology, in particular to an automobile fuel injection control system and method, which are used for controlling the pre-pumping and pre-spraying of the engine oil circuit when the automobile is rolled off the production line in a complete vehicle factory. Background technique [0002] When a new car comes off the assembly line at the vehicle factory, before it is started for the first time, because the vehicle has not been started before, the oil circuit (the pipeline from the fuel tank to the fuel distribution pipe, including the fuel distribution pipe assembly) is filled with air. During the first starting process, the fuel injector sprays air at the beginning stage, and the engine cannot be started. During the subsequent starting process, as the air is continuously discharged, the fuel pressure gradually builds up, but before the air is completely emptied, the mixture The gas is less than the theoretical air-f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D41/22
Inventor 王志伟李嫩
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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