Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ?2 is smaller than a diameter of the valve opening ?1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ?2 is smaller than a diameter of the valve opening ?1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ?2 is smaller than a diameter of the valve opening ?1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

Abstract: An engine starting device is provided with a battery, a starter motor, an inrush current limit circuit and a control unit. The inrush current limit circuit has a resistor and a bypass relay connected in parallel. The inrush current limit circuit is interposed between the battery and the starter motor. The bypass relay has a normally open contact that is configured to be closed at a time of engine startup. The control unit is programmed to include a fault identification unit that identifies a location of fault occurrence in the inrush current limit circuit based on a minimum voltage of the battery existing while the starter motor is determined to be in operation and an amount of decrease in voltage of the battery existing while the normally open contact is determined to be actuated in a closing direction.

Abstract: A current is supplied to a driving relay that drives a bypass relay when restarting an engine after idle reduction, and the current supply to the driving relay is interrupted when the engine is started for the first time based on operation of a driver.

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ?2 is smaller than a diameter of the valve opening ?1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

Abstract: A valve apparatus performs at least one of a first operation in which an electric motor is energized in a valve-close direction and a rotation shaft is rotated until its rotation is stopped and a second operation in which the electric motor is deenergized and a valve is fully closed by a biasing force of a return spring. Thereby, a rotation angle of the rotation shaft becomes a rotation-stop angle or the rotation angle becomes in the backlash range, so that a biasing force of the return spring is not transmitted to the rotation shaft. Then, the electric motor generates a specified torque, which is less than a valve-opening torque by which the valve starts opening. Thereby, a rotation angle of the rotation shaft can be stopped at a full-close angle. The full-close angle can be made correspond to an output of a rotational angle sensor.

Abstract: An engine starting device is basically provided with a resistor, a bypass circuit and a switch. The resistor is configured to be disposed in series between a starter motor and a battery. The bypass circuit is disposed in parallel with respect to the resistor. The switch is configured to selectively open and close the bypass circuit, the switch opening the bypass circuit in response to commencement of engine startup, and closing the bypass circuit in response to the battery voltage approaches a maximum value during engine startup.

Abstract: A cam full close stopper defines a cam full close position that is a limit position of a rotatable range of a cam. A sensor element outputs a signal corresponding to a rotation angle of the cam. A signal processor changes the signal output from the sensor element into a sensor output. A storage part memorizes a data table representing a correspondence relationship between the rotation angle of the cam and the sensor output of the signal processor in a predetermined form, characteristics of the sensor output being adjustable at a plurality of points with respect to the rotation angle of the cam. The storage part memorizes the sensor output of the signal processor when the cam is fully closed at the cam full close position.

Abstract: In an exhaust system for an internal combustion engine, an output member is configured to transmit power generated by a motor to a valving element via a valve stem. An output shaft is disposed on a rotation central axis of an output gear and coupled with the output gear to be rotatable integrally therewith. A follower is disposed eccentrically relative to a rotation central axis of the output shaft and connected to the output shaft to be rotatable integrally therewith. A first accommodating chamber accommodates at least the valve stem and the follower. A second accommodating chamber accommodates at least the motor and the output gear. A housing includes a housing wall that divides the first chamber from the second chamber. The housing wall includes a first bearing slidably supporting the output shaft in its rotation direction, and a cylindrical first bearing holder holding outer periphery of the first bearing.

Abstract: A vehicular engine automatic stop control apparatus has a coast stop controller that performs a coast stop control of stopping an engine in response to a situation where driver's brake pedal operation is above a predetermined threshold value while a vehicle is traveling, a road surface gradient sensor that senses a road surface gradient, and a coast stop control cancellation unit that cancels the coast stop control in response to a situation where a first sensed value of the road surface gradient is above a predetermined cancellation threshold value in absolute value. The first sensed value of the road surface gradient is obtained at a first time instant when the vehicle becomes stationary in a situation where the engine has been stopped by the coast stop controller.

Abstract: A current is supplied to a driving relay that drives a bypass relay when restarting an engine after idle reduction, and the current supply to the driving relay is interrupted when the engine is started for the first time based on operation of a driver.

Abstract: A vehicular engine automatic stop control apparatus has a coast stop controller that performs a coast stop control of stopping an engine in response to a situation where driver's brake pedal operation is above a predetermined threshold value while a vehicle is traveling, a road surface gradient sensor that senses a road surface gradient, and a coast stop control cancellation unit that cancels the coast stop control in response to a situation where a first sensed value of the road surface gradient is above a predetermined cancellation threshold value in absolute value. The first sensed value of the road surface gradient is obtained at a first time instant when the vehicle becomes stationary in a situation where the engine has been stopped by the coast stop controller.

Abstract: An engine starting device is basically provided with a resistor, a bypass circuit and a switch. The resistor is configured to be disposed in series between a starter motor and a battery. The bypass circuit is disposed in parallel with respect to the resistor. The switch is configured to selectively open and close the bypass circuit, the switch opening the bypass circuit in response to commencement of engine startup, and closing the bypass circuit in response to the battery voltage approaches a maximum value during engine startup.

Abstract: An engine starting device is provided with a battery, a starter motor, an inrush current limit circuit and a control unit. The inrush current limit circuit has a resistor and a bypass relay connected in parallel. The inrush current limit circuit is interposed between the battery and the starter motor. The bypass relay has a normally open contact that is configured to be closed at a time of engine startup. The control unit is programmed to include a fault identification unit that identifies a location of fault occurrence in the inrush current limit circuit based on a minimum voltage of the battery existing while the starter motor is determined to be in operation and an amount of decrease in voltage of the battery existing while the normally open contact is determined to be actuated in a closing direction.

Abstract: An EGR valve includes an aluminum valve body, an outer metal ring, an inner resin ring, a butterfly valve, and a seal ring. The valve body includes a gas passage therein. The gas passage is part of an EGR passage, through which EGR gas is returned from an exhaust passage to intake passage of an engine. The outer ring has a cylindrical shape, and is fixed and disposed on an inner wall of the gas passage. The inner ring has a cylindrical shape, and is disposed on an inner peripheral wall of the outer ring. The butterfly valve opens or closes an inside of the inner ring, and includes a seal fitting groove at an outer peripheral edge of the butterfly valve. The seal ring is fitted into the groove, and seals a clearance between the butterfly valve and the inner ring when the butterfly valve is closed.

Abstract: In an exhaust system for an internal combustion engine, an output member is configured to transmit power generated by a motor to a valving element via a valve stem. An output shaft is disposed on a rotation central axis of an output gear and coupled with the output gear to be rotatable integrally therewith. A follower is disposed eccentrically relative to a rotation central axis of the output shaft and connected to the output shaft to be rotatable integrally therewith. A first accommodating chamber accommodates at least the valve stem and the follower. A second accommodating chamber accommodates at least the motor and the output gear. A housing includes a housing wall that divides the first chamber from the second chamber. The housing wall includes a first bearing slidably supporting the output shaft in its rotation direction, and a cylindrical first bearing holder holding outer periphery of the first bearing.

Abstract: When a valve body is rotated toward a full-close position in a valve-close mode, a control portion controls an electric motor so that the rotating speed of the valve body is lower than that in a valve-open mode. A rotating speed of the valve body around the shaft in the valve-close mode is lower than that in the valve-open mode. Thus, when the seal ring is brought into contact with the inner wall surface, an impact generated therebetween can be moderated. While the valve body is rotated toward the full-close position, a seal ring is gradually elastically deformed. A sliding friction between the seal ring and the inner wall surface can be reduced.

Abstract: A valve apparatus performs at least one of a first operation in which an electric motor is energized in a valve-close direction and a rotation shaft is rotated until its rotation is stopped and a second operation in which the electric motor is deenergized and a valve is fully closed by a biasing force of a return spring. Thereby, a rotation angle of the rotation shaft becomes a rotation-stop angle or the rotation angle becomes in the backlash range, so that a biasing force of the return spring is not transmitted to the rotation shaft. Then, the electric motor generates a specified torque, which is less than a valve-opening torque by which the valve starts opening. Thereby, a rotation angle of the rotation shaft can be stopped at a full-close angle. The full-close angle can be made correspond to an output of a rotational angle sensor.

Abstract: A cam full close stopper defines a cam full close position that is a limit position of a rotatable range of a cam. A sensor element outputs a signal corresponding to a rotation angle of the cam. A signal processor changes the signal output from the sensor element into a sensor output. A storage part memorizes a data table representing a correspondence relationship between the rotation angle of the cam and the sensor output of the signal processor in a predetermined form, characteristics of the sensor output being adjustable at a plurality of points with respect to the rotation angle of the cam. The storage part memorizes the sensor output of the signal processor when the cam is fully closed at the cam full close position.