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Method and device for controlling injection of fuel for marine diesel engine

A marine diesel engine and fuel injection technology, which is applied in the direction of fuel injection control, engine control, electrical control, etc., can solve the problems of oil pressure pump drive efficiency degradation, marine diesel engine fuel mileage reduction, oil deterioration, etc., achieve constant speed, eliminate fuel The difference in the actual opening of the injection valve and the effect of reducing NOX

Inactive Publication Date: 2007-12-19
TOKYO UNIV OF MANNE SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, not only the driving efficiency of the hydraulic pump deteriorates, but also the oil deteriorates due to the return of high-temperature oil to the oil tank, and it is necessary to increase the size of the oil tank in order to suppress the temperature rise.
[0023] In addition, the fuel mileage of the marine diesel engine is also reduced because the rotating shaft of the marine diesel engine is always driving the oil pressure pump

Method used

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  • Method and device for controlling injection of fuel for marine diesel engine
  • Method and device for controlling injection of fuel for marine diesel engine
  • Method and device for controlling injection of fuel for marine diesel engine

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Embodiment Construction

[0085] Next, embodiments of the present invention will be described.

[0086] FIG. 1 shows the configuration of a fuel injection control device for a marine diesel engine according to an embodiment of the present invention.

[0087] The fuel injection control device 1 shown in FIG. 1 includes a marine diesel engine 2 to be controlled, a fuel injection valve opening and closing mechanism 3 , and a fuel injection amount control mechanism 4 .

[0088] As a sensor system, the fuel injection control device 1 has: a first sensor 6 arranged near the rotating shaft 5 of the marine diesel engine 2 for detecting the rotational speed of the marine diesel engine 2; 2nd sensor 8. The second sensor 8, as described below, preferably detects the opening degree of the fuel injection valve 7 indirectly by detecting the piston movement amount of the hydraulic cylinder of the fuel injection valve opening and closing mechanism 3, rather than directly detecting the opening of the fuel injection va...

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Abstract

A method and a device for controlling fuel injection of a marine diesel engine wherein the control is exercised so as to match the loading condition at the time point of fuel injection are provided. The method comprises: a step of measuring the fuel injection amount and the rotational speed of the marine diesel engine a prescribed number of times at prescribed time intervals and inputting the measurements, a step of evaluating a relational expression satisfying the relation between the fuel injection amount and the rotational speed of the marine diesel engine, a step of calculating the fuel injection amount (u k ) that should be injected at present according to said relational expression when the rotational speed of the marine diesel engine is set to a target rotational speed, and a step of controlling the opening of the fuel injection valve of the marine diesel engine so as to match said calculated fuel injection amount at present.

Description

technical field [0001] The invention relates to a fuel injection control method and device for a marine diesel engine. [0002] In particular, the present invention relates to a fuel injection control method and device for a marine diesel engine, which can correctly match the load state of the marine diesel engine during fuel injection for the high load and low load states that periodically occur in the marine diesel engine The fuel injection control is used to maintain the speed of the marine diesel engine at a constant speed. Background technique [0003] Generally speaking, when a ship is sailing on the ocean, it will be affected by waves and the swing of the hull, and it sails under the condition of periodic resistance. Therefore, the marine diesel engine is periodically in a high-load state and a low-load state. [0004] In the case of a ship, unlike a road vehicle, it is better for a marine diesel engine to maintain the rotational speed of the marine diesel engine at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/04F02D29/02F02M37/08
CPCF02D2041/1416F02D41/38F02D41/2477F02D29/02F02D31/007F02D41/32F02D41/2451F02B3/06F02M37/007F02D41/04F02M37/08
Inventor 大津皓平伊藤雅则清水悦郎广濑典树
Owner TOKYO UNIV OF MANNE SCI & TECH
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