When a rotational speed of an engine is higher than a predetermined rotational speed, a low-pressure fuel injection valve is controlled through the use of a fuel injection time based on an estimated fuel pressure in a low pressure supply pipe and a target fuel injection amount. When the rotational speed of the engine is equal to or lower than the predetermined rotational speed, the low-pressure fuel injection valve is controlled through the use of a fuel injection time based on a detected fuel pressure input from the fuel pressure sensor from the issuance of a command to activate energization of a solenoid to the start of energization of the solenoid and a target fuel injection amount.

When a rotational speed of an engine is higher than a predetermined rotational speed, a low-pressure fuel injection valve is controlled through the use of a fuel injection time based on an estimated fuel pressure in a low pressure supply pipe and a target fuel injection amount. When the rotational speed of the engine is equal to or lower than the predetermined rotational speed, the low-pressure fuel injection valve is controlled through the use of a fuel injection time based on a detected fuel pressure input from the fuel pressure sensor from the issuance of a command to activate energization of a solenoid to the start of energization of the solenoid and a target fuel injection amount.

A fuel tank includes a tank main body having an opening, a pump unit mounted to a mounting position on a bottom of the tank main body through the opening and having a fuel pump and a pump retaining member retaining the fuel pump and, and a guide means configured to guide the pump unit from an opening side of the tank main body to the mounting position on a bottom side of the tank main body. The guide means includes a guide rail provided on the tank main body and a slider provided on the pump unit. The slider is configured to be slidably engaged with the guide rail.

A fuel pump module for a fuel tank prevents electrification of a filter within the fuel pump module. A port injection filter is housed in a filter case that is separate from a pump case that houses a port injection fuel pump. A ground bracket housed in the filter case includes a cylinder part, a first connection part, and a second connection part, which are formed as a single body and made of conductive resin. The cylinder part is disposed inside of the port injection filter. The second connection part is disposed on an opposite side of the bracket relative to the first connection part, where the first connection part is connected with the cylinder part, for the connection to the ground through a ground line. As a result, a static electricity caused by friction of fuel flowing through the filter is discharged to the ground.

A fuel pump module includes: a pump unit; a lid provided to close an opening of a fuel tank; and a flexible fuel tube. The pump unit includes a fuel pump configured to pump fuel out of the fuel tank, a housing that holds the fuel pump, and a filter configured to filter the fuel. The lid has a discharge port to supply the fuel to outside of the fuel tank. The flexible fuel tube connects the pump unit and the discharge port. The housing includes a guide portion configured to fix the pump unit to a fixing member having a pair of rails provided in the fuel tank, and a separation regulating member configured to regulate the guide portion from separating from the pair of rails by engaging with the fixing member.

A fuel pump module includes: a pump unit; a lid provided to close an opening of a fuel tank; and a flexible fuel tube. The pump unit includes a fuel pump configured to pump fuel out of the fuel tank, a housing that holds the fuel pump, and a filter configured to filter the fuel. The lid has a discharge port to supply the fuel to outside of the fuel tank. The flexible fuel tube connects the pump unit and the discharge port. The housing includes a guide portion configured to fix the pump unit to a fixing member having a pair of rails provided in the fuel tank, and a separation regulating member configured to regulate the guide portion from separating from the pair of rails by engaging with the fixing member.

An external fuel pump and a valve seat for the fuel pump are provided. The valve seat includes a valve body. One side of the valve seat body is provided with an installation chamber for installing a valve body, and the other side of the valve seat body is an oil separator. The oil separator is connected to an outer wall of the installation chamber. The external fuel pump includes the valve seat and a fuel chamber constituted by a housing and a cover. The valve seat body is located in the fuel chamber, the oil separator of the valve seat body is located at a lower portion of an exhaust port provided on the cover. An anti-flip mechanism is provided between the exhaust port and the oil separator. The valve seat is multi-functional and convenient to install with less space and fewer components, which reduces costs.

A fuel consumption-measuring system includes a feed line, a first pump which pumps fuel from a tank via the feed line to a consumer, a fuel consumption-measuring device in the feed line, a first return line which branches off at the consumer and opens into the feed line between the fuel consumption-measuring device and the consumer, a second return line which branches off from the feed line between the first pump and the fuel consumption-measuring device which opens into the tank, a branch which leads from the feed line into the second return line, a heat exchanger, and a flow device arranged in the first and second return lines. The flow device provides an equal volume flow at an opening of the first return line into the feed line and at the branch leading from the feed line into the second return line.

The present invention relates to a system and a method for supplying fuel and, more particularly, to a system and a method for supplying fuel, characterized in that LNG is pumped and supplied to a ship engine and, when the internal pressure of a pressure-resistant tank rises above the necessary pressure of the ship engine, the BOG is supplied to the ship engine, thereby controlling the internal pressure of the pressure-resistant tank, and an eductor is arranged at a point, at which lines that supply LNG and BOG join with each other, upstream of the ship engine such that the lines that supply LNG and BOG can be controlled simultaneously.

The present invention relates to a system and a method for supplying fuel and, more particularly, to a system and a method for supplying fuel, characterized in that LNG is pumped and supplied to a ship engine and, when the internal pressure of a pressure-resistant tank rises above the necessary pressure of the ship engine, the BOG is supplied to the ship engine, thereby controlling the internal pressure of the pressure-resistant tank, and an eductor is arranged at a point, at which lines that supply LNG and BOG join with each other, upstream of the ship engine such that the lines that supply LNG and BOG can be controlled simultaneously.