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Combustion control apparatus for internal combustion engine

A technology for internal combustion engines and control equipment, which is applied in engine control, internal combustion piston engines, combustion engines, etc., and can solve problems such as increased engine back pressure

Inactive Publication Date: 2007-09-19
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the accumulated amount of PM in the particulate filter exceeds a specified amount, the back pressure of the engine rises, causing trouble in operation

Method used

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  • Combustion control apparatus for internal combustion engine
  • Combustion control apparatus for internal combustion engine
  • Combustion control apparatus for internal combustion engine

Examples

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Embodiment Construction

[0052] Referring now to FIG. 1, therein is shown a diesel engine including a combustion control device according to an embodiment of the present invention. The intake air flows in through an air cleaner (not shown) arranged at the inlet of the intake passage 11. The air cleaner removes dust particles from the inhaled air. The compressor 12a of the variable nozzle turbocharger 12 is arranged in the intake passage 11, and the compressor 12a compresses the sucked air. An intercooler 13 is arranged downstream of the compressor 12a, which cools the compressed intake air. After cooling, the sucked air flows to the buffer tank 14. The buffer tank 14 includes a manifold portion for distributing intake air to the cylinder. A throttle valve 15 is arranged upstream of the buffer tank 14, which changes the flow rate of the sucked air. The throttle valve 15A is connected to a throttle valve actuator 151 to adjust its opening degree.

[0053] A fuel injector 21 in each cylinder is arranged in t...

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PUM

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Abstract

A combustion control apparatus operates an internal combustion engine in a split retard combustion mode during regenerating an exhaust purifier such as a particulate filter. In the split retard combustion mode, the combustion control apparatus controls a first fuel injection to cause preliminary combustion at or near top dead center, and controls a second fuel injection to cause main combustion after an end of the preliminary combustion. In this manner, the combustion control apparatus controls an exhaust gas temperature, or an exhaust air-fuel ratio, without increasing exhaust smoke. During the split retard combustion mode, the combustion control apparatus controls an EGR rate of the engine. The EGR rate in the split retard combustion mode is set lower than in the normal combustion mode, in each operating point of the engine.

Description

Technical field [0001] The present invention generally relates to a control device for an internal combustion engine, and particularly relates to a combustion control device for an internal combustion engine with an exhaust gas purifier such as a particulate filter, which is configured to reduce the excessive air ratio of the engine and increase the engine The exhaust temperature will not increase the exhaust smoke. Background technique [0002] In recent years, for engines with exhaust gas purifiers in exhaust passages, various technologies have been disclosed to increase the temperature of exhaust gas to activate the exhaust gas purifiers. Such a technique is disclosed in Japanese PatentProvisional Publication No. 2000-320386, particularly in sections [0106] to [0111]. In this technique, the basic fuel injection quantity that produces the required engine torque is calculated according to the working state of the engine. The basic fuel injection amount of fuel is provided to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/02F02D41/40F02D21/08F02D41/00
CPCY02T10/44F02D41/0275F02D41/403F02D2200/0802F02D41/029Y02T10/47F02D41/027F02D41/028F02D41/005F02D41/40Y02T10/40
Inventor 北原靖久
Owner NISSAN MOTOR CO LTD
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