An electromagnetic fuel injection valve in an engine injects fuel by opening/closing a fuel flowing path with a valve element. A controller controls opening/closing of the fuel flowing path and changes magnetic force generated by a control coil driving the valve element so that the magnetic force is less during a valve open state-holding period than at an initial valve-opening time. The controller detects the voltage of a battery and applies the voltage fed from the battery to the control coil, while changing a time interval (Tc), for which current is passed through the control coil, based on the detected voltage, in order to change the magnetic force, without raising the voltage from the battery. The controller also detects increase/decrease of a pressing force on the valve element caused by fuel pressure and changes the time interval (Tc) accordingly.

Electromagnetic fuel injector and control method thereof

A solenoid-actuated valve assembly is provided with reduced noise. A rubber retainer and steel retainer secure the valve within a manifold, and the rubber retainer absorbs longitudinal vibrations. A plurality of rubber gaskets surround the body of the valve and prevent metal-to-metal contact between the valve body and the manifold for cushioning lateral vibrations of the valve. The valve is substantially submerged in transmission fluid for airborne noise abatement, and opposing ends of the valve body are provided in communication with a vent port for substantially pressure-balancing the valve body.

Three-way solenoid valve

A permanent magnet latching solenoid with a central passage carrying a reciprocative armature has a magnetically permeable bushing press-fit in each end of the bobbin. The outer ends of the bushings define the outer ends of the bore. A separate preformed magnetically permeable frame surrounds the bobbin and includes end wall portions that abut the outer ends of the bushings. The bobbin assembly is inserted laterally into the frame, with the ends of the bushings against the ends of the frame. Openings in the end walls of the frame accommodate free passage of an operator rod element which is affixed to the armature.

Permanent magnet latching solenoid

Using a control coil having a high response characteristic suited to the valve opening and a hold coil suited to a hold to be held a large force by a small large current, during the valve opening time a high voltage is applied to the control coil suited to the valve opening and during a valve opening hold time a low and stabilized voltage is applied to the hold coil suite to the holding, and then a valve body driven. In a fuel injection apparatus, a drive manner during a valve opening time and a hold time is optimized.

Electromagnetic fuel injection apparatus, an internal combustion engine having an electromagnetic fuel injection apparatus, and a drive circuit of an electromagnetic fuel injection apparatus

Es wird ein Verfahren und eine Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers beschrieben. Der Verbraucher weist eine variable Induktivitat auf. In wenigstens einem ersten und einem zweiten Zeitabschnitt sind unterschiedliche Induktivitaten einstellbar.

Verfahren und Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers

A solenoid construction wherein a pull coil means is only adapted to move a plunger means from its deenergized position to a position intermediate its deenergized position and its fully actuated position when the pull coil means is energized whereby the plunger means when disposed in its intermediate position is adapted to be influenced by a hold coil means so that when the hold coil means is also energized the same will move the plunger means from its intermediate position to its fully actuated position and hold the plunger in its fully actuated position regardless of whether or not the pull coil means remains energized.

Raymond J Fox

Papers

Solenoid construction means or the like