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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 suction resistance will increase. In the case of the fuel injection quantity feedback control is also difficult to control the rotational speed

Method used

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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

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Embodiment Construction

[0042] Embodiments of the present invention will be described below 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 air intake passage 2 of the diesel engine 1 is provided with an air intake compressor of a supercharger (turbocharger) 3, the intake air is supercharged by the air intake compressor, cooled by an intercooler 4, and throttled by an air intake Valve 5, then, through collector 6, flows into the combustion chamber of each cylinder. The fuel is made into a high pressure by the common rail type fuel injection device, that is, the high pressure fuel pump 7, and 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 combusted by compression ignition, and the exhaust gas flows ...

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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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