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Control apparatus and method of controlling internal combustion engine mounted on vehicle

一种控制装置、内燃机的技术，应用在电气控制、发动机控制、燃料喷射控制等方向，能够解决难以迅速车辆停止行驶等问题，达到抑制不便的效果

Inactive Publication Date: 2010-03-10
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it becomes difficult to stop the vehicle quickly

Method used

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  • Control apparatus and method of controlling internal combustion engine mounted on vehicle
  • Control apparatus and method of controlling internal combustion engine mounted on vehicle
  • Control apparatus and method of controlling internal combustion engine mounted on vehicle

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0059] According to the first embodiment of the present invention described above, the following effects are obtained. (1) In the process of stopping the car, when the engine 1 is shifted to idling operation, if the car is running on a road surface with a low coefficient of friction, reduce the target engine speed for engine idling control and also reduce accordingly Critical engine speed for engine speed reduction prevention control. Therefore, when the engine speed reduction occurs as the target engine speed decreases, the reduction in the engine speed is suppressed by the action of the disturbance on the drive wheels 6 and becomes equal to or lower than the critical engine speed. Thus, in stopping the running of the vehicle, if the target engine speed is lowered as described above, the execution of the engine speed reduction prevention control is suppressed due to the reduction of the target engine speed, and the engine speed reduction prevention control is suppressed even ...

Embodiment approach

[0076] According to the third embodiment of the present invention, in addition to the effects of the second embodiment of the present invention, the following effects are obtained: (7) Even when the critical engine speed reduction control for preventing engine speed reduction is reduced by the critical engine speed reduction processing, the following effects are obtained: speed, the critical engine speed is also reduced to the lower limit engine speed at most, and the lower limit engine speed is the minimum engine speed when the engine 1 can run autonomously. Therefore, when the engine speed is reduced to a value equal to or lower than the critical engine speed and the engine speed reduction prevention control is executed, the occurrence of inconvenience due to the inability to rapidly increase the engine speed by the control can be appropriately suppressed. That is, the stall of engine 1.

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Abstract

When an engine shifts to idle operation in a process of stopping an automobile, a target engine speed of an engine idle speed control is reduced and a threshold engine speed of an engine speed reduction prevention control is also reduced accordingly, provided that the automobile is traveling on a road surface with low friction coefficient.

Description

technical field [0001] The present invention relates to a control device and method for controlling an internal combustion engine mounted on a vehicle. Background technique [0002] During idling operation of an internal combustion engine mounted on a vehicle such as an automobile, engine idle speed control (ISC) for adjusting the engine speed to a target engine speed set according to an engine operating state such as an engine temperature is performed. The target engine speed for engine idling control is set as follows based on, for example, the engine temperature. That is, when the engine temperature is low and thus the viscosity of the lubricating oil is high, the target engine speed of the engine idling control is set higher than when the engine temperature is high and thus the viscosity of the lubricating oil is low. This is because, as the viscosity of lubricating oil for an internal combustion engine increases, the rotational resistance of the engine increases and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/08
CPCF02D2200/702F02D2200/501F02D41/086F02D41/16F02D41/04F02D41/08F02D41/12F02D45/00
Inventor 角冈卓正源寺良行
Owner TOYOTA JIDOSHA KK