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Internal combustion engine idle speed control

An idle speed, internal combustion engine technology, applied in engine control, fuel injection control, internal combustion piston engine and other directions, can solve the problems of low idle speed, insufficient ISC learning value, etc., to ensure starting and operating performance, improve flameout and driving. poor performance

Active Publication Date: 2020-09-15
MIKUNI SHANGHAI ENTERPRISE MANAGEMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Internal combustion engine idle speed control
  • Internal combustion engine idle speed control
  • Internal combustion engine idle speed control

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] refer to image 3 , wherein a simplified overall schematic diagram of an internal combustion engine 1 equipped according to a preferred embodiment of the present invention is shown. Such as figure 1 As shown, the internal combustion engine 1 is preferably a gasoline engine with a throttle motor 2 operating a throttle valve 3 and a plurality of fuel injection valves 4 , one for each cylinder. As in a general engine, intake air enters the engine 1 throu...

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Abstract

A rotational speed control device for internal combustion engine idling, comprising: an ultra high altitude measurement portion, which is used for determining ultra high altitude idling of a vehicle; a switching portion, which is used for switching to ultra high altitude mode when the vehicle is at an ultra high altitude, wherein an internal combustion engine is controlled by an ultra high altitude control portion under ultra high altitude mode; the ultra-high altitude control portion, which is used to increase the air intake and an ignition advance angle of a cold engine during low temperature idling so as to reach a target rotational speed. Even in the absence of an atmospheric pressure sensor, the target idling rotational speed of an engine may be guaranteed during cold engine idling above an altitude of 3,000 meters, thus the same starting performance and operating performance may be guaranteed as on ground level, and engine flameout and poor driving performance may be improved at an ultra high altitude.

Description

technical field [0001] The invention relates to an engine control device for an internal combustion engine, in particular to an idle speed control device for an internal combustion engine. Background technique [0002] Such as figure 1 As shown, as the altitude increases, the density of the air sucked into the internal combustion engine decreases, resulting in a decrease in idle speed. In a fuel injection system that cannot detect atmospheric pressure, since the idle speed at high altitude becomes lower than the target idle speed at high altitude, the amount of intake air is increased and the engine speed is raised to the target idle speed by feedback control. The increment at this time is stored in the temporary storage device as a learned value. Normally, the same air volume correction value as in the warm state is supplied when the machine is cold. However, at such an ultra-high altitude of 3000 meters or more, the air intake required by the engine tends to increase dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/24
CPCF02D31/003F02D31/008F02D41/2441F02D41/2451F02D41/2454F02D2200/701F02P5/1508Y02T10/40
Inventor 江海陈云涉谷良夫陈奋楠
Owner MIKUNI SHANGHAI ENTERPRISE MANAGEMENT CO LTD
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