A nozzle plate is to be attached to a fuel injection port of a fuel injection device and injects fuel from the fuel injection port into an intake pipe through nozzle holes. The outlet side openings of the nozzle holes are partially blocked by interference bodies to determine the fuel injection directions and form orifices for reducing flows of the fuel at the outlet side openings. The plurality of orifices have different fuel injection directions, fuel fine particles in sprays draw ambient air, and the drawn air is provided with kinetic momentum to generate a spiral air flow. The nozzle plate is formed by cooling and solidifying molten resin having filled the cavity of a die.

A fuel amount distribution method is provided to distribute fuel to a plurality of injectors on each of multiple cylinders of an engine with a dual injector. The fuel amount distribution method includes performing, by a controller, a single injection operation in which a single injector of the plurality of injectors constituting the dual injector injects fuel into a corresponding cylinder when a required fuel injection time of the dual injector of at least one cylinder of the multiple cylinders is less than a minimum injection time of each injector of the plurality of injectors of the dual injector. Thereby, precise air-fuel control in a low fuel rate section is achieved.

In at least some implementations, a charge forming device includes a body that has a throttle bore, a throttle valve associated with the throttle bore, a coupler and an actuator. The throttle has a valve head received within and movable relative to the throttle bore, and a valve shaft to which the valve head is coupled. The coupler is connected to the valve shaft and carries or includes a sensor element. And the actuator has a drive shaft coupled to the coupler so that rotation of the drive shaft is transmitted to the coupler and the valve shaft.

Methods and systems are provided for adjusting engine operating conditions for mitigation of pre-ignition in one or more engine cylinder. In one example, a method may include, in response to indication of pre-ignition, manifold charge cooling may be increased by increasing the portion of fuel delivered to the engine via manifold injection relative to the portion to fuel delivered via one or more of port and direct injection, while maintaining engine operation at or around a stoichiometric air-fuel ratio.

A metal valve body having a fuel injection port includes a nozzle plate accommodation part accommodating a nozzle plate of synthetic resin and aligning a center of the nozzle plate with a central axis of the valve body. A front end surface abutting against the nozzle plate is accommodated in the nozzle plate accommodation part. A swage projection fixes the nozzle plate to the front end side on which the fuel injection port is formed. The nozzle plate is swage-fixed in the state in which a spring action part is elastically deformed on the front end side of the valve body by the swage projection, and a nozzle hole formation part is constantly pushed against the front end surface of the valve body by the elastic force of the spring action part.

Methods and systems are provided for adjusting engine operating conditions for mitigation of pre-ignition in one or more engine cylinder. In one example, a method may include, in response to indication of pre-ignition, manifold charge cooling may be increased by increasing the portion of fuel delivered to the engine via manifold injection relative to the portion to fuel delivered via one or more of port and direct injection, while maintaining engine operation at or around a stoichiometric air-fuel ratio.

An object is to prevent hydrogen from burning before the time of ignition. An internal combustion engine is provided with a first intake port and a second intake port connected to a cylinder, a first fuel injection valve that injects fuel into the first intake port, and an ignition plug provided at a location at which the gas flowing into the cylinder from the second intake port impinges on the ignition plug in a larger quantity than the gas flowing into the cylinder from the second intake port during the intake stroke.

A metal valve body having a fuel injection port includes a nozzle plate accommodation part accommodating a nozzle plate of synthetic resin and aligning a center of the nozzle plate with a central axis of the valve body. A front end surface abutting against the nozzle plate is accommodated in the nozzle plate accommodation part. A swage projection fixes the nozzle plate to the front end side on which the fuel injection port is formed. The nozzle plate is swage-fixed in the state in which a spring action part is elastically deformed on the front end side of the valve body by the swage projection, and a nozzle hole formation part is constantly pushed against the front end surface of the valve body by the elastic force of the spring action part.

A control method for a vehicle injector includes an injection time determination step in which a controller determines whether it is necessary for multiple injectors to inject fuel according to a combustion cycle of a combustion chamber, an individual injection step in which the controller controls each of the multiple injectors to individually inject fuel at different times when the controller determines in the injection time determination step that it is necessary for the injectors to inject fuel, and a simultaneous injection step in which the controller controls each of the multiple injectors to simultaneously inject fuel after the multiple injectors individually inject fuel at different times in the individual injection step.

A fuel amount distribution method is provided to distribute fuel to a plurality of injectors on each of multiple cylinders of an engine with a dual injector. The fuel amount distribution method includes performing, by a controller, a single injection operation in which a single injector of the plurality of injectors constituting the dual injector injects fuel into a corresponding cylinder when a required fuel injection time of the dual injector of at least one cylinder of the multiple cylinders is less than a minimum injection time of each injector of the plurality of injectors of the dual injector. Thereby, precise air-fuel control in a low fuel rate section is achieved.