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Engine speed controller of internal combustion engine, and internal combustion engine comprising it

A technology for speed and speed control of internal combustion engines, applied in engine control, electrical control, machine/engine, etc., can solve the problem of decreased response to target speed change commands, and achieve the effect of improved responsiveness and improved operation stability

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

[0010] On the other hand, in the case of a fuel injection system that performs "multiple average feedback control", although the above-mentioned "near cylinder feedback control" problem does not occur, the responsiveness of the target rotation speed change command during acceleration and deceleration with respect to load fluctuations decline

Method used

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  • Engine speed controller of internal combustion engine, and internal combustion engine comprising it
  • Engine speed controller of internal combustion engine, and internal combustion engine comprising it
  • Engine speed controller of internal combustion engine, and internal combustion engine comprising it

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Embodiment Construction

[0041] Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the case where the present invention is applied to a 4-cylinder marine diesel engine having a pressure accumulation type (common circumference fuel supply pipe) fuel tank provided with a pressure accumulation pipe (so-called common fuel supply pipe) will be described. Jetting device.

[0042] -Description of the configuration of the fuel injection device-

[0043] First, the overall configuration of the fuel injection device applied to the engine of the present embodiment will be described. FIG. 1 is a diagram showing an accumulator-type fuel injection device provided in a 4-cylinder marine diesel engine.

[0044] The accumulator type fuel injection device has a plurality of fuel injection valves (hereinafter referred to as injectors) 1, 1, ... installed corresponding to each cylinder of a diesel engine (hereinafter referred to as the engine), and carries o...

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Abstract

When an engine speed in the expansion stroke of each cylinder is calculated from the time required for the crank angle to rotate from the compression top dead center to a specified angle of that cylinder and stored, and then the stored engine speeds for an immediately preceding cylinder and cylinders preceding it are averaged for use as an engine speed to be fed back in order to determine a fuel injection amount, how many past cylinders are to be subjected to averaging retroactively is determined depending on the operating state of the engine.

Description

technical field [0001] The present invention relates to a rotational speed control device of an internal combustion engine (such as a diesel engine) and an internal combustion engine (hereinafter referred to as an engine) having the rotational speed control device. In particular, the present invention relates to a measure for simultaneously satisfying the improvement of responsiveness of a fuel injection system that determines a fuel injection amount by so-called rotational speed feedback control and engine operation stability. Background technique [0002] In the prior art, for example, as a fuel supply system for a multi-cylinder diesel engine disclosed in Patent Document 1 and Patent Document 2 below, the fuel injection amount from a fuel injection valve is determined by electronic control. In addition, as a method of determining the fuel injection amount, the fuel injection amount is also adjusted in accordance with the fluctuation state of the engine rotation speed. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00
CPCF02D41/0097F02D2041/1432F02D31/007
Inventor 足立仁大谷知广古东文哉盐见秀雄
Owner YANMAR CO LTD