| 摘要 |
<p>This fuel injection pump is a fuel injection pump for pressurizing fuel, which is sucked in a low pressure state, and discharging the pressurized fuel. The fuel injection pump comprises a pump housing provided with: a valve holder which has disposed therein a suction valve, a discharge valve, and a relief valve and which has a pump chamber formed between the suction valve and the discharge valve; and a plunger which pressurizes or depressurizes the pump chamber. The relief valve is provided on the downstream side of the discharge valve and is configured as the valve for returning the fuel further toward the upstream side than the discharge valve. The portion of a flow path which is on the upstream side of the discharge valve and a flow path which extends from the downstream side of the discharge valve to the upstream side of the relief valve are separated within the valve holder and are formed within the same space. The present invention can reduce the number of parts of the fuel injection pump and can reduce cost.</p> |
