| 摘要 |
PURPOSE:To improve the cooling performance of a solenoid coil by forming an orifice on a fuel passage around the case of an electromagnetic fuel injection valve stored in the fitting hole of a throttle body and allowing fuel to flow from the upstream side through the periphery of a bobbin wound with the solenoid coil. CONSTITUTION:An electromagnetic fuel injection valve 6 sucks a core 33 and a needle 29 against a spring 36 via the magnetic force of a stator 22 generated when a pulse current is applied to a solenoid coil 38 from an electronic control unit 14, opens an injection nozzle 31, and injects the fuel in a needle chamber 26 into an intake passage. In this case, a fuel passage 7 is formed between the fitting hole 5 of a throttle body 3 and the case 20 of the fuel injection valve 6 stored in the hole 5, and an orifice 25 consisting of continuous lugs 24 formed around the case 20 is provided on the fuel passage 7. The fuel upstream the orifice 25 is allowed to flow through a communicating port 27, the needle chamber 26, gaps 41, 42 around a bobbin 39 wound with the solenoid coil 38, and an outflow port 47, and the solenoid coil 38 is cooled. |
