초록 ▼

A cylinder connects a measuring chamber filled with fuel to a gas pressure chamber set at a constant pressure maintained by a gas pressure device. A displacement member in the form of a piston separates the gas pressure chamber from the measuring chamber. A fuel injector is mounted to communicate wi

A cylinder connects a measuring chamber filled with fuel to a gas pressure chamber set at a constant pressure maintained by a gas pressure device. A displacement member in the form of a piston separates the gas pressure chamber from the measuring chamber. A fuel injector is mounted to communicate with the measuring chamber. A displacement sensor is disposed inside the gas pressure chamber and has a contact member of free-dropping type which contacts with the top surface of the displacement member. A displacement signal from the displacement sensor representing the amount of displacement of the displacement member is supplied to an arithmetic operation unit. A control circuit controls the injection operation of the fuel injector, and supplies a command to the arithmetic operation unit to calculate the injection amount from the amount of displacement.

대표청구항 ▼

A method for measuring an injection amount of fuel injected by a fuel injector, comprising the steps of: filling with a liquid fuel a measuring chamber which is provided with an injector, where the amount of the fuel injected is to be measured, and defined by a displacement member; sealing a fuel pa

A method for measuring an injection amount of fuel injected by a fuel injector, comprising the steps of: filling with a liquid fuel a measuring chamber which is provided with an injector, where the amount of the fuel injected is to be measured, and defined by a displacement member; sealing a fuel passage to said measuring chamber, when said measuring chamber is filled with said liquid fuel, so as to prevent further supply of fuel; applying pressure of a gas upon said displacement member which defines said measuring chamber, so that the liquid fuel which is filled in said measuring chamber may act upon said injector; causing said injector provided at said measuring chamber to perform a fuel injection operation so that the fuel in said measuring chamber is forced out from the chamber; and detecting the amount of displacement of said displacement member as the fuel is forced out from said measuring chamber, thereby determining the outflow amount of fuel.