Pressure accumulation-type fuel injection device and internal combustion engine with the device

A fuel injection device and technology of fuel injection, which are applied in the directions of fuel injection control, internal combustion piston engine, combustion engine, etc., can solve the problem of difficulty in properly obtaining the fuel injection duration, etc., so as to reduce the amount of NOx generation, improve the fuel cost, reduce the The effect of discharge

Inactive Publication Date: 2007-03-21
YANMAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, it is difficult to properly obtain the fuel injection duration, and the possibility of the above-mentioned problems occurring significantly is high

Method used

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  • Pressure accumulation-type fuel injection device and internal combustion engine with the device
  • Pressure accumulation-type fuel injection device and internal combustion engine with the device
  • Pressure accumulation-type fuel injection device and internal combustion engine with the device

Examples

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Embodiment Construction

[0066] Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the application of the present invention to a fuel supply system of a 6-cylinder marine diesel engine equipped with an accumulator type fuel injection device will be described.

[0067] (first embodiment)

[0068] First, the first embodiment will be described. In this embodiment, a case where the present invention is applied to an accumulator type fuel injection device that performs a fuel injection operation (main injection) to the same cylinder only once in one cycle of the engine will be described.

[0069] -Description of accumulator fuel injection device-

[0070] First, the overall configuration of the accumulator fuel injection device will be described. FIG. 1 shows an accumulator fuel injection device provided in a 6-cylinder marine diesel engine. The components constituting the accumulator-type fuel injection device shown in this figure are subst...

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Abstract

Fuel injection start timing is determined based on an engine speed and engine load, and a common rail inner pressure is detected together with the timing. Based on the detected value of the common rail inner pressure, a fuel injection continuation time is calculated. As a result, a fuel injection continuation time matching a common rail inner pressure at an actual fuel injection start time point can be obtained, and this enables to obtain an appropriate injection amount.

Description

technical field [0001] The present invention relates to a pressure accumulation type (common rail type) fuel injection device having a pressure accumulation piping (so-called common rail) suitable for a fuel supply system of an internal combustion engine (such as a diesel engine) and a fuel injection device having the pressure accumulation Internal combustion engine with fuel injection device. In particular, the present invention relates to countermeasures for appropriately obtaining a fuel injection quantity injected from an injector into a combustion chamber. Background technique [0002] Conventionally, as a fuel supply system for a multi-cylinder diesel engine or the like, an accumulator type fuel injection device having better controllability than the mechanical fuel injection pump-nozzle system has been proposed (Patent Document 1 and Patent Document 2 below) . [0003] This type of fuel injection device stores fuel pressurized by a high-pressure pump to a predetermi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40F02D41/02F02D45/00
CPCF02D41/3809F02D41/40F02D41/403F02D41/009Y02T10/44F02D41/402F02D2250/04F02D2200/0602F02D31/007Y02T10/40
Inventor 足立仁大谷知广古东文哉盐见秀雄
Owner YANMAR CO LTD
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