A fuel flow quantity detection method for a vehicular engine is provided such that a fuel flow quantity can be accurately detected even when fuel composition varies without using values directly detected by for example a mass air flow sensor or an excess air ratio sensor as input information. A fuel flow quantity de...

To prevent foreign materials such as dust or tar that are mixed in gas fuel from being attached to a portion of the orifice that is disposed for measuring the flow rate through the fuel through-hole in the injector of the gas fuel so that the flow rate of the fuel is prevented from decreasing. An injector 1 for ga...

A regulator for a gas fuel is assembled so that assembling properties are not impaired, but any abnormal noise is not generated from a connecting portion between a valve shaft and a diaphragm. A regulator 1A for a gas fuel includes a pressure regulation valve constituted of a valve body 11 formed at a middle positio...

To provide a gas fuel regulator which can prevent an excessive increase of a weight and an increase of a production cost, while a sufficient pressure resistant performance of a high pressure part is secured, a gas fuel regulator 1A for reducing and regulating pressure of introduced gas fuel to be a predetermine...

To provide a pressure regulating mechanism of a gas fuel regulator, which does not need excessive time and effort for assembling and does not need axial alignment between a seat member and a valve body after assembling, a gas fuel regulator 1A includes a seat member 120, a valve body 11 having an inclined surface o...

In regulators, prevent functional loss due to tilting of a piston pressure regulating valve (7). At least a pair of annular bearings (10a, 10b) made of a rigid synthetic resin are interposed along a length direction of a pressure regulating valve body (5) at a predetermined distance at a position on a valve seat sid...

A flow regulating valve (1A) includes a body (10) having a fluid passage through which a fluid passes, a disc (21), a stem (22), and an AC servomotor (40). The AC servomotor (40) is rotated while an opening degree of the disc (21) is detected by an opening degree sensor to change the opening degree of the disc (21)...

A synchronous motor control device includes: a current conversion means that converts a three-phase current or a motor position into a d-axis current and a q-axis current; a current feedback control calculation means that calculates a d-axis voltage command value and a q-axis voltage command value from the d-axis cu...

A synchronous motor control device is enabled to perform automatic and highly accurate gain adjustment in current feedback control by accurately estimating a winding inductance. A control device (1A) includes: an inverter (14); a current converting means (11) that converts a three-phase current of a synchronous mot...

An object of the present invention is to provide a method of diagnosing responsiveness of a pressure sensor (10) provided in an intake manifold (4), which is capable of achieving both of not depending on an operation by a driver and improving diagnostic accuracy. A method of diagnosing responsiveness of a pressure ...

Provided is a device that controls a synchronous motor with as little configuration as possible and with high torque. A synchronous motor control device includes: a synchronous motor having a rotor using a permanent magnet; a voltage command value conversion means configured to convert, according to a d-axis voltag...

Provided is a method of estimating an axis error between a d-q axis and a γ-δ axis of a synchronous motor (2). In a control method of driving a synchronous motor (2) by sensorless vector control, a magnetic axis of a permanent magnet of the synchronous motor (2) is defined as a d-axis, a direction orthogonal to the...

Provided is a control device for realizing torque-free control that avoids runaway when a synchronous motor is stopped. A synchronous motor control device (1) includes current command intermediate value calculation means (14) configured to calculate a d-axis current command intermediate value (idref1) from a motor ...