High-rotating idle speed control device of engine for vehicle

Abstract

The invention provides a high-rotating idle speed control device of an engine for a vehicle, the engine is preheated by opening auxiliary air valve fixed in an auxiliary inhale passage bypassing a throttle valve, the ignition time is delayed for preventing knock, thereby, the engine speed fits close a target idle speed, preheating end can be rapidly and accurately detected even if in an environment that the engine temperature is difficult to raise for avoiding long time uselessness of high-rotating idle speed control. delay angle detection mechanism is used for judging whether the total delayangle amount to the basic ignition time in delay angle control based on a ignition time controlling mechanism (36) reaches a specified value, and when the specified value is reached, an end signal forending high rotating idle speed control is output. An auxiliary air valve controlling mechanism (35) makes an auxiliary air valve (25) becoming a full cut-off state based on the end signal output from the delay angle detection mechanism (37).

Description

technical field [0001] The present invention relates to a high-speed idling control device for a vehicle engine, which includes: an auxiliary air intake passage connected to the air intake passage bypassing a throttle valve provided in the middle of the air intake passage; and capable of switching to a fully open state. and the auxiliary air valve in the fully closed state and arranged in the auxiliary air intake passage; the temperature detection mechanism that detects the index representing the engine temperature; the speed detection mechanism that detects the engine speed; and makes the auxiliary air valve Auxiliary air valve control mechanism that controls the opening / closing of the auxiliary air valve between the fully closed state and the fully open state in a fully open state; controls the ignition timing so that the ignition timing can be at least from the basic ignition timing to the retarded side An ignition timing control means that controls the engine speed detecte...

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Problems solved by technology

[0004] Among them, in order to suppress the rise of the engine speed and increase the retard angle in the ignition timing retard angle control, the temperature rise rate of the engine will be slowed down. Due to the environment, there is a possibility that the temperature of the engine does not reach the predetermined temperature. As disclosed in the above-mentioned Patent Document 1, the high-speed idling control ends when the temperature of the engine reaches the predetermined temperature. In this structure, the temperature of the engine reaches the predetermined temperature. It took a long time before, which caused the problem that high-speed idle speed control was useless for a long time

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