Internal combustion engine idling speed and rotation speed control device

Abstract

The invention discloses an internal combustion engine idling speed and rotation speed control device. The internal combustion engine idling speed and rotation speed control device comprises an ultrahigh altitude measuring part used for judging the vehicle ultrahigh altitude idling speed, a switching part used for conducting switching to the ultrahigh altitude mode when a vehicle is located at theultrahigh altitude, and an ultrahigh altitude control part, wherein in the ultrahigh altitude mode, internal combustion engine control is conducted through the ultrahigh altitude control part, and theultrahigh altitude control part is used for increasing the air inlet volume and the ignition advance angle of a cooling machine at the low-temperature idling speed so as to reach the target rotationspeed. Accordingly, even under the situation that no barometric pressure sensor exists, when the cooling machine at the altitude being 3,000 m or above is at the idling speed, the target rotation speed of an engine can be guaranteed; and at the ultrahigh altitude area, the startability and operation performance the same as the flat ground can be ensured, and flameout and poor driving performance of the engine are improved.

Description

Technical field [0001] The present invention relates to an engine control device of an internal combustion engine, in particular to an internal combustion engine idling speed control device. Background technique [0002] Such as figure 1 As shown, as the altitude increases, the density of air sucked into the internal combustion engine decreases, resulting in a decrease in idle speed. In a fuel injection system in which atmospheric pressure cannot be detected, since the idling speed at high altitude becomes lower than the target idling speed at high altitude, feedback control is used to increase the intake air amount and increase the engine speed to the target idling speed. The increment at this time is stored in the temporary storage device as a learning value. Normally, the same air volume correction value in the warm state is also supplied during cold engine. However, in such an ultra-high altitude above 3000 meters, the engine's required intake air volume tends to increase d...

AI Technical Summary

Problems solved by technology

At very high altitudes, the ISC learning value stored when the engine is hot becomes insufficient when the engine is cold, resulting in low idle speed

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