Abstract: An estimation unit estimates a fuel pressure on a discharge side of a high-pressure pump based on an amount of fuel injection with a fuel injection valve from a time point at which a detected fuel pressure changes from a higher status than a first pressure to a lower status, assuming that the fuel has not been discharged with the high-pressure pump. The determination unit determines that a relief valve is in an open status based on a dropping mode of the estimated fuel pressure and a dropping mode of the detected fuel pressure.

Abstract: An electromagnetic actuator including: a mover; a stator; at least one coil provided to the stator and arranged on an outer periphery of the mover, the coil being configured to be energized to generate an electromagnetic force that exerts a driving force on the mover; at least one yoke member surrounding the coil, the yoke member being constituted by a plurality of yoke segments; and a mold resin filling a space between the yoke segments and the coil, the mold resin fixing the yoke segments to each other. The mold resin extends to an outer peripheral surface of the yoke member and forms an outside resin layer.

Abstract: An electromagnetic actuator including: a stator and a mover configured to have an oscillation force exerted between them, the stator and the mover being arranged in a direction orthogonal to a direction of oscillation with a space in between; and at least one plate spring connecting the stator and the mover to each other, the plate spring permitting relative displacement of the stator and the mover in the direction of oscillation while positioning the stator and the mover with respect to each other in the direction orthogonal to the direction of oscillation, wherein at least one through hole piercing the plate spring in a thickness direction is formed in a portion of the plate spring that corresponds to the space between the stator and the mover.

Abstract: An estimation unit estimates a fuel pressure on a discharge side of a high-pressure pump based on an amount of fuel injection with a fuel injection valve from a time point at which a detected fuel pressure changes from a higher status than a first pressure to a lower status, assuming that the fuel has not been discharged with the high-pressure pump. The determination unit determines that a relief valve is in an open status based on a dropping mode of the estimated fuel pressure and a dropping mode of the detected fuel pressure.

Abstract: An electromagnetic actuator including: an outer housing member wherein outer peripheral edges of lid members are fixed respectively to opposite axial sides of the outer tubular member; an inner axial member elastically-connected to the outer housing member by plate springs at opposite axial sides thereof such that central portions of the plate springs are attached to the inner axial member, while outer peripheral edges of the plate springs are clamped and fixed between the outer tubular member and the respective lid members; a stator and a mover having electromagnetic oscillation force between them securely-assembled to the outer housing member and the inner axial member; and integrally-formed seal rubber and stopper rubber provided at inner faces of the lid members to seal a fixation part to the outer tubular member and to cushion strike of the inner axial member against the lid members, respectively.

Abstract: An electromagnetic actuator including: an outer tubular member and an inner axial member connected by an elastic member; a coil member attached to the outer tubular member generating electromagnetic force through energization thereto; a magnet member attached to the inner axial member and subjected to the electromagnetic force to exert axial driving force between the inner axial member and the outer tubular member; a first support section provided at the outer tubular member to axially clamp and securely support the coil member; a synthetic resin annular member housed within the outer tubular member including a power feed terminal to the coil member; and a second support section provided at the outer tubular member to axially clamp and securely support the annular member in such a parallel structure that clamping force by the first support section is not exerted on the second support section.

Abstract: An electromagnetic actuator including: an inner axial member; an outer housing member; a stator and a mover configured to have electromagnetic oscillation force exerted between them, each being securely assembled to different one of the members; and plate springs elastically connecting the members at opposite axial sides thereof, wherein the outer housing member includes an outer tubular member and first and second lid members attached to opposite axial openings thereof, and a first axial side of the outer tubular member has a small-diameter constricted section, and the constricted section has axially inner and outer stepped walls, and the axially inner stepped wall positions a first axial side of the stator or the mover assembled to the outer housing member, while the axially outer stepped wall and the first lid member support a periphery of the corresponding plate spring.

Abstract: A fluid-filled vibration-damping device including: a first mounting member; a second mounting member; a main rubber elastic body elastically connecting the two mounting members; a fluid chamber whose wall is constituted by the main rubber elastic body at a portion and by a flexible film at another portion, the fluid chamber being filled with a non-compressible fluid; a fixation member being attached to an outer peripheral rim of the flexible film and being disposed inside or outside the tubular second mounting member such that the fixation member is superposed to the second mounting member in an axis-perpendicular direction; an insertion hole formed in the second mounting member and the fixation member; and a positioning member inserted through the insertion hole so as to relatively position the second mounting member and the fixation member at a scaling position by axial locking.

Abstract: A fluid-filled vibration damping device including a hollow buffer body with an inner space. The hollow buffer body is housed in a housing space of a partition member to come in contact with wall inner surfaces of the housing space on sides of a pressure-receiving chamber and an equilibrium chamber, while stores a movable member in the inner space thereof. Liquid pressure of the pressure-receiving chamber is applied to a first face of the movable member by having a first window portion formed in the buffer body communicated with a first communication hole of the housing space while liquid pressure of the equilibrium chamber is applied to a second face of the movable member by having a second window portion formed in the buffer body communicated with a second communication hole of the housing space.

Abstract: A bracket-equipped vibration-damping device including: a vibration-damping device main body including vertically-separated, elastically-connected first and second mounting members; a bracket receiving the device main body inserted laterally thereinto; a connection-insert section provided for the second mounting member; a connection groove provided for the bracket extending in an insertion direction of the device main body; at least one up-down urging rubber fixed on an outer surface of the connection-insert section on an upper-lower first side; and a lock protrusion formed on an inner surface of the connection groove on an upper-lower second side, with a smaller protrusion dimension than an up-down thickness of the up-down urging rubber such that the connection-insert section is laterally inserted into the connection groove beyond the lock protrusion before being urged to the second side by the up-down urging rubber to be positioned to the connection groove.

Abstract: A variable valve timing control device has, as control modes for adjusting inflow and outflow of oil with an OCV, a lock mode for moving a lock pin in a locking direction, a phase control mode for controlling a camshaft phase by a target phase in accordance with an operation state of an engine, and an oil filling mode for filling an advancement chamber and a retardation chamber with the oil in a state that the lock pin moves in the locking direction, before shifting from the lock mode to the phase control mode. When the oil filling mode has been selected, a target position of a spool is set based on viscosity of the oil, and the position of the spool is controlled so as to be the set target position.

Abstract: An electromagnetic actuator including: a stator and a mover configured to have an oscillation force exerted between them, the stator and the mover being arranged in a direction orthogonal to a direction of oscillation with a space in between; and at least one plate spring connecting the stator and the mover to each other, the plate spring permitting relative displacement of the stator and the mover in the direction of oscillation while positioning the stator and the mover with respect to each other in the direction orthogonal to the direction of oscillation, wherein at least one through hole piercing the plate spring in a thickness direction is formed in a portion of the plate spring that corresponds to the space between the stator and the mover.

Abstract: A bracket-equipped vibration-damping device including: a vibration-damping device main body including vertically-separated, elastically-connected first and second mounting members; a bracket receiving the device main body inserted laterally thereinto; a connection-insert section provided for the second mounting member; a connection groove provided for the bracket extending in an insertion direction of the device main body; at least one up-down urging rubber fixed on an outer surface of the connection-insert section on an upper-lower first side; and a lock protrusion formed on an inner surface of the connection groove on an upper-lower second side, with a smaller protrusion dimension than an up-down thickness of the up-down urging rubber such that the connection-insert section is laterally inserted into the connection groove beyond the lock protrusion before being urged to the second side by the up-down urging rubber to be positioned to the connection groove.

Abstract: A fluid-filled vibration-damping device including: a first mounting member; a second mounting member; a main rubber elastic body elastically connecting the two mounting members; a fluid chamber whose wall is constituted by the main rubber elastic body at a portion and by a flexible film at another portion, the fluid chamber being filled with a non-compressible fluid; a fixation member being attached to an outer peripheral rim of the flexible film and being disposed inside or outside the tubular second mounting member such that the fixation member is superposed to the second mounting member in an axis-perpendicular direction; an insertion hole formed in the second mounting member and the fixation member; and a positioning member inserted through the insertion hole so as to relatively position the second mounting member and the fixation member at a scaling position by axial locking.

Abstract: An electromagnetic actuator including: an inner axial member; an outer housing member; a stator and a mover configured to have electromagnetic oscillation force exerted between them, each being securely assembled to different one of the members; and plate springs elastically connecting the members at opposite axial sides thereof, wherein the outer housing member includes an outer tubular member and first and second lid members attached to opposite axial openings thereof, and a first axial side of the outer tubular member has a small-diameter constricted section, and the constricted section has axially inner and outer stepped walls, and the axially inner stepped wall positions a first axial side of the stator or the mover assembled to the outer housing member, while the axially outer stepped wall and the first lid member support a periphery of the corresponding plate spring.

Abstract: An electromagnetic actuator including: an outer tubular member and an inner axial member connected by an elastic member; a coil member attached to the outer tubular member generating electromagnetic force through energization thereto; a magnet member attached to the inner axial member and subjected to the electromagnetic force to exert axial driving force between the inner axial member and the outer tubular member; a first support section provided at the outer tubular member to axially clamp and securely support the coil member; a synthetic resin annular member housed within the outer tubular member including a power feed terminal to the coil member; and a second support section provided at the outer tubular member to axially clamp and securely support the annular member in such a parallel structure that clamping force by the first support section is not exerted on the second support section.

Abstract: At a time of a startup in a non-lock state (at the time of a next startup in a case where an internal combustion engine is stopped in a non-lock state in which a VCT phase is not locked in an intermediate lock phase), it is determined whether or not the engine can be started up by most delayed startup processing. In a case where it is determined that the engine can be started up by the most delayed startup processing, the most delayed startup processing is performed. In this most delayed startup processing, the engine is cranked in a high rotation range not less than a specified rotation speed and a fuel injection and an ignition are started in a state in which the VCT phase is controlled to a vicinity of the most delayed phase (most delayed phase or within a specified range from the most delayed phase) to thereby start up the engine. In this way, at the time of the startup in the non-lock state, the engine can be quickly started up without locking the VCT phase.

Abstract: An electromagnetic actuator including: an outer housing member wherein outer peripheral edges of lid members are fixed respectively to opposite axial sides of the outer tubular member; an inner axial member elastically-connected to the outer housing member by plate springs at opposite axial sides thereof such that central portions of the plate springs are attached to the inner axial member, while outer peripheral edges of the plate springs are clamped and fixed between the outer tubular member and the respective lid members; a stator and a mover having electromagnetic oscillation force between them securely-assembled to the outer housing member and the inner axial member; and integrally-formed seal rubber and stopper rubber provided at inner faces of the lid members to seal a fixation part to the outer tubular member and to cushion strike of the inner axial member against the lid members, respectively.

Abstract: A variable valve timing control device has, as control modes for adjusting inflow and outflow of oil with an OCV, a lock mode for moving a lock pin in a locking direction, a phase control mode for controlling a camshaft phase by a target phase in accordance with an operation state of an engine, and an oil filling mode for filling an advancement chamber and a retardation chamber with the oil in a state that the lock pin moves in the locking direction, before shifting from the lock mode to the phase control mode. When the oil filling mode has been selected, a target position of a spool is set based on viscosity of the oil, and the position of the spool is controlled so as to be the set target position.

Abstract: A fluid-filled vibration damping device including: a primary fluid chamber which gives rise to internal pressure fluctuations based on deformation of a main rubber elastic body at times of vibration input; an auxiliary fluid chamber which gives rise to pressure differentials relative to the primary fluid chamber at times of vibration input; an orifice passage which permits a non-compressible sealed fluid filling the primary fluid chamber and the auxiliary fluid chamber to flow between the two fluid chambers; and an insoluble powder mixed in the sealed fluid filling the primary fluid chamber which provides a bubble nucleus and accelerates dispersed generation of bubbles when pressure within the primary fluid chamber is decreased.