Abstract: A valve opening/closing timing controlling apparatus includes a housing member 3 rotatable together with a timing gear 110 (drive member), a rotor member 2 rotatably assembled with the housing member 3, a vane 70 portion of the rotor member forming, within the housing member 3, a phase-advanced oil chamber R1 and a phase-lagged oil chamber R2, the rotor member being rotatable together with a cam shaft 10, a torsion coil spring 55 for urging the rotor member 2 relative to the housing member 3 in a phase advancing direction, and a phase-advanced oil passage (hydraulic circuit) 65 or a phase-lagged oil passage (hydraulic circuit) 66 a hydraulic circuit for controlling feeding/discharging of work oil to or from the phase-advanced oil chamber R1 or the phase-lagged oil chamber R2. The torsion coil spring 55 has one end 55a thereof fixed to the housing member 3 and the other end 55b thereof fixed to a projection 28 provided on the rotor member 2.

Abstract: A fluid supply apparatus includes a fluid pump for supplying a fluid to a fluid supplied portion from a fluid storage portion, a pair of passages provided between the fluid storage portion and the fluid supplied portion in series with the fluid pump, one of the pair of passages including a first supply passage with a check valve therein for preventing the fluid from flowing back to the fluid storage portion from the fluid supplied portion and the other of the pair of passages including a second supply passage provided in parallel with the first supply passage, and a switching apparatus for switching the second supply passage to a state in which the fluid can flow in the second supply passage.

Abstract: To present a demodulator of frequency modulated signals and a demodulating method of frequency modulated signals capable of demodulating frequency modulated signals having frequency deviation favorably. An input signal SIN (f±fDEV) having frequency deviation (±fDEV) from carrier frequency (f) is inputted in a signal converting unit 1, and an input square signal SSQ (f±fDEV) having same frequency as fundamental frequency is outputted. The input square signal SSQ mainly containing odd-number degree higher harmonics at fundamental frequency is put into a decoder 3, together with first signal SR (N×f) outputted at N times (N being 2 or greater natural number) of frequency of carrier frequency (f) from a signal output unit 2. The input square signal SSQ is converted by quadrature depending on the first signal SR, thereby producing two signals SI and SQ which are signals of N times of frequency (N×fDEV) of frequency deviation, inverted in phase difference by 90 degrees depending on the deviation.

Abstract: A variable valve timing control device comprises a housing member integrally rotating with either one of a crankshaft or a camshaft of an internal combustion engine, a rotor member assembled to the housing member so as to be rotatable relative thereto, including at least one of vane portions forming an advanced angle chamber and a retarded angle chamber within the housing member, and integrally rotating with the other one of the crankshaft or the camshaft; a fluid pressure circuit for controlling operation fluid to be supplied to or discharged from the advanced angle chamber and the retarded angle chamber, an engaging groove formed at the housing member in circumferential direction and including an advanced angle side end portion and a retarded angle side end portion, a lock member provided at the housing member and being freely projecting/retreating, and a projecting portion provided at the rotor member and projecting outward, which is sandwiched between either one of the end portions of the engaging groove

Abstract: A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.

Abstract: A variable valve timing control device includes a housing member, a rotor member assembled to the housing member so as to be rotatable relative thereto and including vane portions each forming an advanced angle chamber and a retarded angle chamber within the housing member, a stopper formed on the convex portion for restricting a relative rotation between the housing member and the rotor member, a lock mechanism for restricting the relative rotation by a lock member, and a fluid pressure circuit for controlling an operation oil to be supplied to or discharged from the advanced angle chamber, the retarded angle chamber, and the lock mechanism. When the relative rotation is restricted, the lock member is in contact with an inner peripheral face of the receiving hole on the advanced angle side and the retarded angle side between an opening portion and a bottom portion of the receiving hole.

Abstract: An apparatus for controlling an internal combustion engine equipped with a variable valve timing control device includes the variable valve timing control device for restricting a relative rotation between a crankshaft and an exhaust camshaft at a starting of the internal combustion engine at a most advanced angle phase or at an intermediate angle phase between the most advanced angle phase and a most retarded angle phase. An apparatus for controlling an internal combustion engine equipped with a variable valve timing control device further includes a throttle valve control means for controlling an opening of the throttle valve provided at an intake passage of the internal combustion engine. The throttle valve control means controls the throttle valve to be opened when the internal combustion engine is started, thereby to restrict the relative rotation between the crankshaft and the exhaust camshaft.

Abstract: A variable valve timing control device includes a housing member, a rotor member assembled to the housing member so as to be rotatable relative thereto and including vane portions each forming an advanced angle chamber and a retarded angle chamber within the housing member, a stopper formed on the convex portion for defining a relative rotation between the housing member and the rotor member, a lock mechanism for restricting the relative rotation by a lock member, and a fluid pressure circuit for controlling an operation oil to be supplied to or discharged from the advanced angle chamber, the retarded angle chamber, and the lock mechanism. When the relative rotation is restricted, the lock member is in contact with an inner peripheral face of the receiving hole on the advanced angle side and the retarded angle side between an opening portion and a bottom portion of the receiving hole.

Abstract: A variable valve timing control device comprises a housing member integrally rotating with either one of a crankshaft or a camshaft of an internal combustion engine, a rotor member assembled to the housing member so as to be rotatable relative thereto, including at least one of vane portions forming an advanced angle chamber and a retarded angle chamber within the housing member, and integrally rotating with the other one of the crankshaft or the camshaft; a fluid pressure circuit for controlling operation fluid to be supplied to or discharged from the advanced angle chamber and the retarded angle chamber, an engaging groove formed at the housing member in circumferential direction and including an advanced angle side end portion and a retarded angle side end portion, a lock member provided at the housing member and being freely projecting/retreating, and a projecting portion provided at the rotor member and projecting outward, which is sandwiched between either one of the end portions of the engaging groove

Abstract: An apparatus for controlling an internal combustion engine equipped with a variable valve timing control device includes the variable valve timing control device for restricting a relative rotation between a crankshaft and an exhaust camshaft at a starting of the internal combustion engine at a most advanced angle phase or at an intermediate angle phase between the most advanced angle phase and a most retarded angle phase. An apparatus for controlling an internal combustion engine equipped with a variable valve timing control device further includes a throttle valve control means for controlling an opening of the throttle valve provided at an intake passage of the internal combustion engine. The throttle valve control means controls the throttle valve to be opened when the internal combustion engine is started, thereby to restrict the relative rotation between the crankshaft and the exhaust camshaft.

Abstract: A valve timing control device includes a rotary member rotatably arranged in a torque transmitting route between a crankshaft and a camshaft of an internal combustion engine, a rotational transmitting member rotatable relative to the rotary member, a pressure chamber formed by the rotary member and the rotational transmitting member, a vane provided on the rotary member or the rotational transmitting member to divide the pressure chamber between an advancing chamber and a delaying chamber, a helical spring having a coil portion, a first end portion engaging the rotary member, and a second end portion engaging the rotational transmitting member to urge the rotary member in the advancing direction to expand the advancing chamber. One of the end portions of the helical spring extends on an imagined radial plane arranged in the radial direction of the coil portion.

Abstract: A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.

Abstract: The present invention provides a valve timing regulating device which controls the opening/closing timing of an exhaust valve of an internal engine combustion engine so that upon starting the engine a rotor member is rotated relative to a housing member for reaching in shorter time duration a region in which a lock mechanism functions. The valve timing regulation device includes a fluid pressure circuit controlling the supply and drainage of operating fluid to and from each of the advance angle fluid chamber and the retard angle fluid chamber.

Abstract: A variable valve timing system is provided with a relative rotation controlling mechanism allowing relative rotation of the housing member and the rotor member by an unlock operation through the supply of operation fluid, and restricting the relative rotation of the housing member and the rotor member at an intermediate angle phase between a most retarded angle phase and a most advanced angle phase by a lock operation through the discharge of the operation fluid. A hydraulic pressure circuit controls the supply and discharge of the operation fluid to the relative rotation controlling mechanism and also controls the supply and discharge of the operation fluid to the advanced angle chamber and the retarded angle chamber. The hydraulic pressure circuit is adapted to discharge the operation fluid from the advanced angle chamber, the retarded angle chamber and the relative rotation controlling mechanism when the combustion engine is started.

Abstract: A valve timing control device includes a rotary member rotatably arranged in a torque transmitting route between a crankshaft and a camshaft of an internal combustion engine, a rotational transmitting member rotatable relative to the rotary member, a pressure chamber formed by the rotary member and the rotational transmitting member, a vane provided on the rotary member or the rotational transmitting member to divide the pressure chamber between an advancing chamber and a delaying chamber, a helical spring having a coil portion, a first end portion engaging the rotary member, and a second end portion engaging the rotational transmitting member to urge the rotary member in the advancing direction to expand the advancing chamber. One of the end portions of the helical spring extends on an imagined radial plane arranged in the radial direction of the coil portion.

Abstract: A variable valve timing system that inhibits or substantially prevents the generation of noise produced by the vane at engine start, improves smooth engine start and enlarges the variable timing control area includes a first relative rotation restricting member restricting relative rotation between a rotation member and a rotation transmitting member from the most advanced angle position to the most retarded angle position at a position corresponding to engine start and a second rotation restricting member restricting relative rotation between the rotation member and the rotation transmitting member from the most retarded angle position to the most advanced angle position at the position corresponding to the engine start and releasing the restriction by fluid pressure in the advanced angle chamber.

Abstract: A variable valve timing system have a rotor member relatively rotatably mounted into a housing member and forming an advanced angle chamber and a retarded angle chamber at a vane portion in the housing member. In the system, a lock member of a lock mechanism is not caught between the rotor member and the housing member when a volume of either the advanced angle chamber or the retarded angle chamber shifts from an initial volume to a target volume. The hydraulic pressure within the system is shifted from an initial condition in which the volume is maintained at the initial volume and locked by the lock mechanism, to another condition in which the volume is varied to the target volume after passing a transition in which the volume is maintained at the initial volume and the lock mechanism is being unlocked during a predetermined time.

Abstract: A variable valve timing system includes a hydraulic pressure circuit for controlling an operation fluid supply/discharge of the relative rotation controlling mechanism and for controlling an operation fluid supply/discharge of each of the advanced angle chamber and the retarded angle chamber. The hydraulic pressure circuit, upon initiation of the internal combustion engine, discharges the operation fluid from the relative rotation controlling mechanism and the advanced and retarded angle chambers until a pressure of the operation fluid reaches a controllable pressure value.

Abstract: A valve timing controller with the structure of a stopper mechanism and a lock mechanism thereof is so provided as to reduce the cost and the size of the controller.

Abstract: A variable valve timing system includes a hydraulic pressure circuit for controlling an operation fluid supply/discharge of the relative rotation controlling mechanism and for controlling an operation fluid supply/discharge of each of the advanced angle chamber and the retarded angle chamber. The hydraulic pressure circuit, upon initiation of the internal combustion engine, discharges the operation fluid from the relative rotation controlling mechanism and the advanced and retarded angle chambers until a pressure of the operation fluid reaches a controllable pressure value.