An electromagnetic PCV valve includes a valve seat, a valve element, a step motor for moving the valve element, and a housing that houses the valve seat, the valve element, and the step motor. When the valve element is moved by the step motor, a size (an opening degree) of a blow-by gas passage defined between the valve seat and the valve element is changed. The step motor is configured to selectively receive energization for moving the valve element and energization for holding the valve element in a fixed position. A heating apparatus of the PCV valve 1 includes a cover member and an output shaft that conducts heat generated in the step motor by energization to the valve element and the valve seat, and an electronic control unit (ECU) for conducting energization of the step motor to hold the valve element in the fixed position.

Heating apparatus of electromagnetic PCV valve

PROBLEM TO BE SOLVED: To provide an engine fuel injector capable of suppressing the voltage drop of a battery, ensuring the consistent engine startability irrespective of freezing of water content, ingress of lubricating oil or the like, and reliably opening a cylinder injection valve by releasing the sticking thereof. SOLUTION: During the period after the ON-operation of an ignition switch 11 for operating a starter 20 before the operation of the starter 20, a control unit 10 operates a gaseous hydrogen injection valve I1 to a degree in which any gaseous hydrogen is not injected by the valve opening. Sticking of a movable part 5b caused by freezing of water content or ingress of lubricating oil is released in advance, and a direct injection type hydrogen injector I1 can be reliably opened at the cranking. COPYRIGHT: (C)2008,JPO&INPIT

Engine fuel injector

PROBLEM TO BE SOLVED: To provide a method for improving the performance of an electrically operable mechanical valve actuator. SOLUTION: This method comprises a step of elecrifying a coil of an electrically operable mechanical valve, the current is applied at a frequency above the natural frequency of the mechanical valve, and the current is set to a level sufficient to produce a power density at the coil to substantially raise the temperature of an armature of the electrically operable mechanical valve. By this method, heat can be supplied to a target area of the actuator so that the performance of the valve can be improved during at least a predetermined operating condition. COPYRIGHT: (C)2008,JPO&INPIT

Method and system for improving operation of electrically controlled actuator

PROBLEM TO BE SOLVED: To use an electronic expansion valve without being frosted, even in a low temperature environment to frost the electronic expansion valve. SOLUTION: An electronic expansion valve controller 10 applies a voltage for heating in order to flow a current for heating, to exciting coils LA1, LA2, LA3, and LA4, through a driver 21, in the no opening/closing operation time of an electronic expansion valve 4. As a result, the frosting is prevented by utilizing the heat generated to the exciting coils LA1, LA2, LA3, and LA4, so as to facilitate the redriving of the electronic expansion valve 4.

Control device of electronic expansion valve and control method of electronic expansion valve

PROBLEM TO BE SOLVED: To reduce torque with good response while generation of back fire is inhibited. SOLUTION: A fuel control device for a hydrogen engine provided with a first hydrogen supply means injecting and supplying gaseous hydrogen directly into a working chamber and a second hydrogen supply mean injecting and supplying gaseous hydrogen into an air intake passage communicating to the working chamber, is provided with a determination means determining whether a predetermined torque reduction control condition is satisfied or not, and a hydrogen supply ratio control means establishing hydrogen supply ratio of hydrogen supplied from the first hydrogen supply means and the second hydrogen supply means according to an operation condition of the hydrogen engine and controlling the hydrogen supply ratio to increase supply ratio of hydrogen supplied from the second hydrogen supply means in relation to established hydrogen supply ratio when the determination means judges that the predetermined torque reduction control condition is satisfied. COPYRIGHT: (C)2007,JPO&INPIT

Fuel control device for hydrogen engine

PURPOSE: To ensure a start in a severely cold climate by using as many open signals as possible with an utmost possible size to just open affiliated injection valves practically for multiplex controls. CONSTITUTION: When an ignition lock 15 is operated, a clock generator 13 reports that a fuel should be delivered to start an engine 10 to an injection valve control device 14. The injection valve control device 14 evaluates whether the signal obtained from an engine temperature sensor 12 is below a temperature threshold value or not. When the signal is below the threshold value, the whole injection duration is split into multiple relatively short injection periods by the affiliated open signal. When there is an additional usable time in the operation cycle, an additional short open signal is outputted. The magnetic coil of an injection valve 11 is heated by the open signal to prevent the freezing of a valve seat section, thereby an internal combustion engine can be reliably started even in a severely cold climate.

Method and equipment for controlling start at time of cold in internal combustion engine

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Method and equipment for controlling start at time of cold in internal combustion engine