Denso Corporation

Kazuaki Nemoto

Hiroshi Okada

Tadao Ikihara

Akio Imai

A valve timing adjusting device includes an intake variable valve mechanism and an exhaust variable valve mechanism. The exhaust variable valve mechanism includes an exhaust electric driving portion and an exhaust phase shifting portion including an input shaft. The exhaust phase shifting portion is disposed in a rotation transmission path between an exhaust camshaft and a crankshaft and configured to shift a rotation phase of the exhaust camshaft. The input shaft rotates in a rotational direction opposite to a rotational direction of the crankshaft when advancing the rotation phase. A phase of the exhaust phase shifting portion is configured to be shifted to a most advanced angle phase when the exhaust electric driving portion is de-energized or fails and when the exhaust phase shifting portion receives a torque in a forward rotational direction.

Valve timing adjusting device

A joint includes a rotation transmitting portion and a stopper portion. The rotation transmitting portion abuts on a relative rotating portion in a circumferential direction. The stopper portion is capable of abutting on the relative rotating portion to restrict an axial position of the relative rotating portion. The stopper portion of the joint which rotates at the same speed as the relative rotating portion restricts an axial position of the relative rotating portion, whereby a sliding movement does not occur between the relative rotating portion and the stopper portion. It can be restricted that a power transmission efficiency is decreased and an abrasive wear is generated.

Valve timing controller

A valve timing control apparatus includes: a rear plate; a housing fixed to the rear plate; and a vane rotor which is able to rotate relative to the housing. The vane rotor includes a rotor and a vane extending from the rotor outward in a radial direction to divide an oil pressure chamber of the housing into an advance chamber and a retard chamber. The vane has an axial end surface adjacent to the rear plate and a radially outer surface. A first chamfer part is defined at a connection between the axial end surface and the radially outer surface of the vane so as to reduce a surface pressure applied from the rear plate to the vane.

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Kariya, Japan

Kazuaki Nemoto