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Fuel injection device for internal combustion engine

A technology of fuel injection device and fuel injection valve, which is applied to fuel injection device, fuel injection pump, internal combustion piston engine, etc., can solve the problems of low accuracy of test learning value and inability to completely reduce the change of instrument error characteristics.

Inactive Publication Date: 2008-07-30
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since the accuracy of the experimentally learned values ​​obtained by experimentally learning is low, it is not possible to thoroughly reduce the characteristic variation due to the meter error of the fuel supply pump

Method used

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  • Fuel injection device for internal combustion engine
  • Fuel injection device for internal combustion engine
  • Fuel injection device for internal combustion engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] Referring to FIG. 1 , there is shown a common rail fuel injection system according to an exemplary embodiment of the present invention. The internal combustion engine control system according to this embodiment has an exhaust emission purification device (not shown), a turbocharger (not shown), a common rail fuel injection system (pressure accumulation fuel injection device), and an internal combustion engine control unit (internal combustion engine controller, ECU) 10. The exhaust emission purification device purifies exhaust emissions flowing out of combustion chambers of individual cylinders of an internal combustion engine, such as a diesel engine (multi-cylinder diesel engine), installed in a vehicle, such as an automobile. A turbocharger uses the exhaust energy emitted by the exhaust gases to supercharge the intake air drawn into the combustion chambers of the cylinders of the internal combustion engine. The common rail fuel injection system injects and delivers ...

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Abstract

A fuel injection device of an internal combustion engine executes tentative learning repeatedly while engine cooling water temperature increases. An actual learning value is renewed with the newest instrumental error learning value so that accuracy of the actual learning value is improved gradually. Thus, a variation of characteristics due to an instrumental error of a supply pump is absorbed as early as possible. In addition, accuracy of a tentative learning value obtained through the tentative learning is quickly brought close to the accuracy of the actual learning value obtained through main learning. As a result, a learning period at vehicle factory shipment is shortened and productivity at a vehicle factory is improved.

Description

technical field [0001] The present invention relates to a fuel injection device for an internal combustion engine having a fuel supply pump that controls the amount of fuel discharged to fuel injection valves installed for individual cylinders of the internal combustion engine. In particular, the present invention relates to a pressure-accumulating fuel injection device having a charge pump that utilizes a solenoid valve to meter fuel intake to control fuel discharge that is pressured to a common rail. Background technique [0002] A common rail fuel injection system known as a fuel injection system for a diesel engine has a common rail for accumulating high-pressure fuel that is distributed to a plurality of injectors installed for individual cylinders of the internal combustion engine. At a predetermined timing, high-pressure fuel is injected and supplied from an injector of the cylinder to a combustion chamber of each cylinder of the internal combustion engine. High pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00
CPCF02M59/366F02M37/04F02D41/40F02D41/2441Y02T10/44F02M65/00F02D41/248F02D41/3845F02M63/0225F02D41/2464Y02T10/40
Inventor 高桥智宏
Owner DENSO CORP
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