Control apparatus for internal combustion engine

A technology for control devices and internal combustion engines, which is applied in engine control, fuel injection control, internal combustion piston engines, etc., and can solve problems such as the inability to diagnose the abnormality of the heavy-light ratio detection sensor

Inactive Publication Date: 2009-12-09
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, for alcohol blended fuels, it is impossible to correctly diagnose the abnormality of the heavy-to-light ratio detection sensor by the above-mentioned method

Method used

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  • Control apparatus for internal combustion engine
  • Control apparatus for internal combustion engine
  • Control apparatus for internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. figure 1 A case where the control device in the first embodiment of the present invention is applied to an in-cylinder injection type spark ignition type internal combustion engine is shown.

[0030] refer to figure 1 , respectively, 1 indicates the main body of the internal combustion engine, 2 indicates the combustion chamber of each cylinder, 3 indicates the spark plug for igniting the fuel in each combustion chamber 2, 4 indicates the intake manifold, and 5 indicates the exhaust manifold. The intake manifold 4 is connected to an outlet of a compressor 7 a of an exhaust turbocharger 7 via an intake pipe 6 , and an inlet of the compressor 7 a is connected to an air cleaner 8 . A throttle valve 9 driven by a stepping motor is arranged in the intake pipe 6 , and a cooling device 10 for cooling the intake air flowing in the intake pipe 6 is arranged around the i...

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Abstract

Provided is a control apparatus for an internal combustion engine capable of using a heavy-gravity fuel, a light-gravity fuel, an alcohol fuel and their mixture as a fuel. The control apparatus comprises a heave / light gravity ratio detecting device (39) capable of detecting the ratio between the heavy-gravity fuel and the light-gravity fuel, and an air / fuel ratio detecting device (41) for detecting the air / fuel ratio of the exhaust gas. The fuel injection rate is calculated on the basis of the heavy / light gravity ratio detecting device so that the air / fuel ratio may be a target air / fuel ratio. The abnormality of the heavy / light ratio detecting device is diagnosed on the basis of the difference between the target air / fuel ratio of the case, in which the engine temperature is within a predetermined temperature range, and the air / fuel ratio which is detected by the air / fuel ratio detecting device. As a result, the abnormality of the heavy / light ratio detecting sensor can be precisely diagnosed on the alcohol-mixed fuel, too.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] In recent years, alcohol (especially ethanol) has attracted attention as a substitute fuel for gasoline from the viewpoint of reducing pollution and suppressing the use of natural resources. Alcohol is often used not as a single substance but as an alcohol blended fuel mixed with gasoline or the like. The alcohol content ratio of the alcohol blended fuel is not always fixed, and in order to operate the internal combustion engine properly, it is necessary to control the internal combustion engine such as changing the fuel injection amount according to the alcohol content ratio. Therefore, when the fuel quality changes due to refueling or the like, it is necessary to detect the alcohol content ratio. [0003] Therefore, in the device described in JP-A-2003-120363, when overfueling is detected, the fuel injection amount is temporarily increased or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00F02D19/08F02D41/02F02D41/04F02D41/06F02P5/15
CPCF02D19/0623F02D19/0628F02B29/0437F02D41/222Y02T10/36F02D2200/0611F02D41/1454F02M25/0727F02D19/088Y02T10/46F02D19/0657F02D41/0025F02D19/061F02P5/1502F02M25/0707F02D19/084F02M26/05F02M26/23Y02T10/30Y02T10/40
Inventor 加藤雄一一瀬宏树村瀬直大崎理江
Owner TOYOTA JIDOSHA KK
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