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Control method and system for engine fuel

A control method and engine technology, applied in the direction of engine control, fuel injection control, charging system, etc., can solve the problems of reduced engine driving performance, dangerous driving conditions, engine shutdown, etc.

Inactive Publication Date: 2003-06-11
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore if Figure 4B As shown, due to the superposition effect of the lean air / fuel ratio, the final air / fuel ratio will become extremely deviated from the normal value, so the drivability of the engine decreases and the emission of harmful gases increases
[0011] Also, when the air / fuel ratio deviates significantly from normal, the engine shuts down and can make driving conditions dangerous

Method used

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  • Control method and system for engine fuel
  • Control method and system for engine fuel
  • Control method and system for engine fuel

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Embodiment Construction

[0025] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0026] First, refer to figure 2 , which is a system for controlling engine fuel in a preferred embodiment of the present invention.

[0027] The control system of engine fuel in a preferred embodiment of the present invention comprises detection device, and this detection device has a plurality of sensors that convert the variable of engine driving state into electric signal; An electronic control unit 15 (being referred to as ECU hereinafter), this The control unit calculates the amount of fuel supplied to the engine according to the signal sent by the detection device and sends a fuel supply signal; the fuel injector 14 supplies fuel to the engine according to the fuel supply signal sent by the ECU15 middle.

[0028] The ECU 15 may include one or more microprocessors running a predetermined program including instructions for a meth...

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Abstract

The present invention relates to a method and system for preventing a lean Air / Fuel ratio that may occur when accelerating an engine. An engine is supplied with a base amount of fuel that is adjusted, or compensated, according to one or more compensation variables that are based on an oxygen sensor signal. If the compensation variables are reduced by more than a predetermined amount and the throttle valve open-angle exceeds a predetermined value, then the method and system of the invention prevent a lean Air / Fuel ratio that may occur by initializing the compensation variables for a predetermined period of time, thereby allowing the engine to perform smoothly.

Description

technical field [0001] The present invention relates to an engine fuel control method and system, in particular to a fuel control method and system capable of preventing a lean air / fuel ratio at the beginning of sudden acceleration so as to keep the driving state of the engine stable. Background technique [0002] The vehicle's fuel system consists of a system that controls and collects the evaporated gas of the fuel, which is evaporated and generated according to the flow of fuel in the fuel tank and the internal temperature, and discharges it into the engine through the pipeline. The intake system burns again to prevent polluting the air. [0003] The accumulated fuel vapor may flow into the intake system by controlling the purge control solenoid valve in the vapor control system according to the driving state of the vehicle. [0004] Such as figure 1 As a specific example shown, during the driving process, the negative pressure in the intake system is used to suck the f...

Claims

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Application Information

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IPC IPC(8): F02D45/00F02D41/10F02D41/14F02D41/18F02M25/08
CPCF02D2200/501F02D2200/0404F02D41/187F02D41/1454F02D41/10F02D41/1487F02M25/08
Inventor 赵相范
Owner HYUNDAI MOTOR CO LTD
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