Control apparatus for an internal combustion engine

A technology of a control device and an internal combustion engine, which is applied in engine control, fuel injection control, electrical control, etc., can solve the problem that the fuel injection amount is difficult to control the speed of rotation, etc., and achieve the effect of good responsiveness

Inactive Publication Date: 2006-06-28
NISSAN MOTOR CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0007] On the other hand, if the excess air ratio is constant and the EGR rate is reduced, the collection pressure will decrease and the suc

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

Examples

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Example Embodiment

[0042] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0043] figure 1 It is a system diagram showing an internal combustion engine (here, a diesel engine) according to an embodiment of the present invention.

[0044] The suction path 2 of the diesel engine 1 is provided with a suction compressor of a supercharger (turbocharger) 3. The suction air is supercharged by the suction compressor and cooled by the intercooler 4, and is throttled by the suction The valve 5 then passes through the collector 6 and flows into the combustion chamber of each cylinder. The fuel is made into a high pressure by a common rail type fuel injection device, that is, a high pressure fuel pump 7, and is sent to the common rail 8, and is directly injected into the combustion chamber from the fuel injection valve 9 of each cylinder. The air flowing into the combustion chamber and the injected fuel are burned here by compression ignition, and the exhau...

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Abstract

A control device for an internal combustion engine capable of performing rotational speed control with excellent response during idling operation in a diesel engine even when the excess air ratio is lowered, the constant volume is lowered, or the like. The constant volume degree CVOL during idling operation is predicted based on at least one of an excess air ratio, an ignition timing of fuel, and an in-cylinder compression end temperature (S1). An operating load FMOT during idling operation is estimated based on at least one of intake pressure, EGR rate, excess air ratio, water temperature, and auxiliary load (S2). The idle injection quantity is calculated according to the constant volume CVOL and the operating load FMOT (S3-S6).

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine, in particular to a control device during idling operation. Background technique [0002] In an internal combustion engine, particularly a diesel engine, as disclosed in Patent Document 1, the fuel injection amount is feedback-controlled during idling so that the engine speed matches the target idling speed. [0003] Patent Document 1: JP-A-2002-030962 [0004] However, in a region where the excess air ratio (λ) of the diesel engine is lower than that of the normal lean mixture ratio region, the combustion period becomes longer and the constant volume degree is greatly reduced, making it difficult to control the rotational speed by feedback control of the fuel injection amount. [0005] When the ignition timing of the fuel is delayed and the combustion period becomes longer, and when the compression end temperature in the cylinder decreases and the combustion period be...

Claims

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Application Information

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IPC IPC(8): F02D41/08
CPCF02D31/001F02D41/083
Inventor 三浦学
Owner NISSAN MOTOR CO LTD
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