JP2015124713A5

JP2015124713A5 -

Info

Publication number: JP2015124713A5
Application number: JP2013270058A
Authority: JP
Filing date: 2013-12-26
Publication date: 2017-02-09
Anticipated expiration: 2033-12-26

Claims

A gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
An openable / closable injection valve for injecting the gaseous fuel into the combustion chamber;
A supply flow path through which the gaseous fuel supplied to the injection valve flows;
A gate valve capable of opening and closing the supply flow path;
A pressure sensor for detecting the pressure of the supply flow path between the injection valve and the gate valve;
A control device that outputs a command signal for opening and closing the injection valve and the gate valve,
A gaseous fuel supply system that detects a closing abnormality of the injection valve based on a detection result of the pressure sensor and a detection result of a detection device that detects a crank angle of a crankshaft of the engine.

A gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
An openable / closable injection valve for injecting the gaseous fuel into the combustion chamber;
A supply flow path through which the gaseous fuel supplied to the injection valve flows;
A gate valve capable of opening and closing the supply flow path;
A pressure sensor for detecting the pressure of the supply flow path between the injection valve and the gate valve;
A control device that outputs a command signal for opening and closing the injection valve and the gate valve,
A gaseous fuel supply system that detects an abnormal opening of the gate valve based on a detection result of the pressure sensor and a detection result of a detection device that detects a crank angle of a crankshaft of the engine.

A gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
An openable / closable injection valve for injecting the gaseous fuel into the combustion chamber;
A supply flow path through which the gaseous fuel supplied to the injection valve flows;
A gate valve capable of opening and closing the supply flow path;
A pressure sensor for detecting the pressure of the supply flow path between the injection valve and the gate valve;
A control device that outputs a command signal for opening and closing the injection valve and the gate valve,
A gaseous fuel supply system that detects a closing abnormality of the gate valve based on a detection result of the pressure sensor and a detection result of a detection device that detects a crank angle of a crankshaft of the engine.

A gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
An injection valve for injecting the gaseous fuel into the combustion chamber;
A supply flow path through which the gaseous fuel supplied to the injection valve flows;
A gate valve capable of opening and closing the supply flow path;
A pressure sensor for detecting the pressure of the supply flow path between the injection valve and the gate valve;
A control device for controlling the injection valve and the gate valve,
Based on a detection result of the pressure sensor and a detection result of a detection device that detects a crank angle of the crankshaft of the engine, an abnormality of at least one of the injection valve and the gate valve is detected,
The control device obtains the position of the piston of the engine including the top dead center and the bottom dead center based on the detection result of the detection device, and the piston is top dead to supply the gaseous fuel to the combustion chamber. After opening the gate valve at a point in the vicinity of the point, open the injection valve, close the injection valve, and then output a command signal to close the gate valve,
A gaseous fuel supply system that detects the abnormality based on a detection result of the pressure sensor when the piston is located near bottom dead center.

The gas according to claim 4 , wherein it is determined which of the injection valve and the gate valve is abnormal based on a detection result of the pressure sensor and a detection result of an in-cylinder sensor that detects a pressure in the combustion chamber. Fuel supply system.

A pre-injection valve that injects the gaseous fuel into the combustion chamber before the injection of the gaseous fuel from the injection valve;
The control device closes the pre-injection valve that injected the gaseous fuel and then closes the gate valve, and then issues a command signal to open the gate valve for the injection of the gaseous fuel from the injection valve. Output,
An abnormality of the pre-injection valve is detected based on a detection result of the pressure sensor in a period from when a command signal for closing the pre-injection valve is output until a command signal for opening the gate valve is output. The gaseous fuel supply system according to claim 4 or 5 .

The engine includes a dual fuel engine,
Based on the detection result of said pressure sensor in said the liquid fuel from the liquid fuel injection valve is supplied to the combustion chamber the gaseous fuel is not supplied fuel only mode claims 1 to 6 for detecting an abnormality of the injector The gaseous fuel supply system according to any one of the above.

An abnormality detection method for a gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
The gaseous fuel supply system includes an openable / closable injection valve that injects gaseous fuel into the combustion chamber, a supply flow path through which the gaseous fuel supplied to the injection valve flows, and a gate valve that can open and close the supply flow path And comprising
Detecting the pressure of the supply flow path between the injection valve and the gate valve;
Detecting the crank angle of the crankshaft of the engine;
And detecting a closing abnormality of the injection valve based on a detection result of the pressure in the supply flow path and a detection result of the crank angle.

An abnormality detection method for a gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
The gaseous fuel supply system includes an openable / closable injection valve that injects gaseous fuel into the combustion chamber, a supply flow path through which the gaseous fuel supplied to the injection valve flows, and a gate valve that can open and close the supply flow path And comprising
Detecting the pressure of the supply flow path between the injection valve and the gate valve;
Detecting the crank angle of the crankshaft of the engine;
Detecting an abnormality in the opening of the gate valve based on the detection result of the pressure in the supply flow path and the detection result of the crank angle, and detecting an abnormality in the gaseous fuel supply system.

An abnormality detection method for a gaseous fuel supply system for supplying gaseous fuel to a combustion chamber of an engine,
The gaseous fuel supply system includes an openable / closable injection valve that injects gaseous fuel into the combustion chamber, a supply flow path through which the gaseous fuel supplied to the injection valve flows, and a gate valve that can open and close the supply flow path And comprising
Detecting the pressure of the supply flow path between the injection valve and the gate valve;
Detecting the crank angle of the crankshaft of the engine;
Detecting abnormality of the closing of the gate valve based on the detection result of the pressure of the supply flow path and the detection result of the crank angle, and detecting an abnormality of the gaseous fuel supply system.