Method for control of engine to reduce exhaust gas during cold starting and idling of car

Abstract

An engine control method for reducing exhaust gas during cold start and idling of an automobile. The method is divided into four stages: 1. Turn on the ignition device switch to enter the starting state, control the amount of inhaled air to make the air-fuel ratio become lean, and control the engine to be at No-load state; 2. The engine starts to start, and the second stage of controlling the air-fuel ratio and delaying the ignition timing according to the engine speed and engine load; 3. If the engine speed formed by the first and second stage control is greater than the target speed, it will enter after the start In the no-load mode, output the air volume according to the detected rotational speed and cooling water temperature, and at the same time control the air-fuel ratio and the third stage of delayed ignition timing according to the changing engine rotational speed and load; 4. In the third stage, control the formed engine rotational speed. If the rotational speed is less than the target speed, the current shifting stage is converted into a driving shifting stage, and enters the driving mode, and the fourth stage of engine control is formed according to the corresponding mode.

Description

Technical field: [0001] The invention solves the engine control method for reducing exhaust gas during cold start and idling of automobiles. Specifically, when the gasoline engine is cold-started and idling, the method of delaying the ignition timing is adopted to form the start-up and idling under the lean state of the air-fuel ratio (hereinafter referred to as the air-fuel ratio), and at the same time effectively supplement the petroleum gas content, so as to achieve the elimination of hydrocarbons. The purpose of material minimization. Background technique: [0002] Generally, when the vehicle is running, the engine of an automobile is controlled according to the amount of fuel injected, the amount of intake air, and the timing of ignition generated by the driving conditions. This control process is based on the operating conditions, the electrical signals detected by each detector are compared and judged with the data in the engine electronic controller (ECU), and the c...

AI Technical Summary

Problems solved by technology

Accurate engine control becomes complicated if incomplete combustion of the gas is minimized due to air volume variations, ignition timing variations, and air / fuel ratio variations caused by the actuator (ISA)

At the same time, the difficulty of control has also increased, that is to say, the displacement has increased due to the above reasons.

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