摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning agent addition unit capable of restraining deterioration of fuel injection performance due to adhesion of a deposit and restraining harmful effects due to over-supply of a cleaning agent when the cleaning agent is supplied to a fuel injection valve. SOLUTION: In the cleaning agent addition unit, which is used for an internal combustion engine having a combustion chamber 106 for leading air flowing in an intake port 102i through a gap L of an opened intake valve and a fuel injection valve 2 with an injection hole section 21 for injecting fuel to the combustion chamber and supplies the cleaning agent used for cleaning carbon deposit attached on an injection hole section to the fuel injection valve, the cleaning agent addition unit is provided with a reservoir 71 for storing the cleaning agent, a cleaning agent supply flow passage 78 which is separated from a fuel supply flow passage lead from a fuel tank to the fuel injection valve and leads the cleaning agent from the reservoir 71, and the cleaning agent supplied from the cleaning agent supply flow passage, and injects the cleaning agent toward the injection hole section of the fuel injection valve. The cleaning agent addition unit determines the supplied amount of the cleaning agent to be injected to the injection hole section in response to attached conditions of the deposit, and also has a supply unit 70 for supplying a determined appropriate amount of the cleaning agent. COPYRIGHT: (C)2008,JPO&INPIT
|