Abstract: In a valve timing controller, the guide-groove biases the moving element in a direction in which the moving element slides with respect to a radial line connecting a center of the guide-rotational element and the moving element, when the guide-rotational element relatively rotates with respect to the first rotational element. The direction in which the moving elements are pushed and the direction in which the moving elements moves are substantially identical to each other.

Abstract: A valve timing controller includes a first gear rotating together with a crankshaft, a planetary carrier eccentric to the first gear, a second gear engaging with the planetary carrier. The second gear performs a planetary motion while engaging with the first gear. The planetary motion is converted into a rotational motion of the camshaft to change a relative rotational phase between the crankshaft and the camshaft. A pressing element is provided between the planetary carrier and the second gear for pressing the second gear by the elastic force. An action line of the elastic force is inclined to the eccentric direction line of the planetary carrier in the circumferential direction.

Abstract: A variable valve timing controller has a phase adjusting mechanism. The phase adjusting mechanism includes a first rotating member and second rotating member which are respectively rotate in synchronization with a driving shaft and a driven shaft of an engine, a first arm rotatably connected with the first rotating member, and a second arm rotatably connected with the second rotating member and the first arm. In the first arm, a distance between connecting points is defined as a distance L1. In the second arm, a distance between connecting points is defined as a distance L2. A ratio L1/L2 is defined within a range of 0.5 to 2.

Abstract: A variable valve timing controller has a phase adjusting mechanism. The phase adjusting mechanism includes a first rotating member and second rotating member which are respectively rotate in synchronization with a driving shaft and a driven shaft of an engine, a first arm rotatably connected with the first rotating member, and a second arm rotatably connected with the second rotating member and the first arm. In the first arm, a distance between connecting points is defined as a distance L1. In the second arm, a distance between connecting points is defined as a distance L2. A ratio L1/L2 is defined within a range of 0.5 to 2.

Abstract: It is an object to provide a continuously variable valve timing adjusting device to improve valve timing advance response for an internal combustion engine. The device, capable of continuously and variably controlling the intake valve timing phase, includes: an advance chamber which hydraulically rotates a vane rotor and a camshaft on the advance side relative to the timing rotor; a retard chamber for rotating the camshaft on the retard side relative to the timing rotor; an advance-retard oil pressure control valve; an oil communicating passage for fluid communication between the advance chamber and the retard chamber; a hydraulic piston, flow control valve which controls the oil in the communicating passage according to the retard chamber pressure when the engine is running at a low speed and a high oil temperature; and a ball valve check valve which checks the oil flow from the advance chamber to the retard chamber.

Abstract: A restraining hole for restraining a stopper piston is constituted by a straight hole having an axis perpendicular to the direction of a relative rotation of a vane rotor with respect to a shoe housing and a tapered hole formed on a deep side of the straight hole and reduced in diameter on a deep side thereof. According to this construction, by virtue of a wedge effect between the tapered hole and the stopper piston, a relative rotation between a driving shaft system and a driven shaft system can be restrained at a predetermined angular position and it is possible to suppress the occurrence of a striking sound.

Abstract: It is an object to provide a continuously variable valve timing adjusting device to improve valve timing advance response for an internal combustion engine. The device, capable of continuously and variably controlling the intake valve timing phase, includes: an advance chamber which hydraulically rotates a vane rotor and a camshaft on the advance side relative to the timing rotor; a retard chamber for rotating the camshaft on the retard side relative to the timing rotor; an advance-retard oil pressure control valve; an oil communicating passage for fluid communication between the advance chamber and the retard chamber; a hydraulic piston, flow control valve which controls the oil in the communicating passage according to the retard chamber pressure when the engine is running at a low speed and a high oil temperature; and a ball valve check valve which checks the oil flow from the advance chamber to the retard chamber.

Abstract: A restraining hole for restraining a stopper piston is constituted by a straight hole having an axis perpendicular to the direction of a relative rotation of a vane rotor with respect to a shoe housing and a tapered hole formed on a deep side of the straight hole and reduced in diameter on a deep side thereof. According to this construction, by virtue of a wedge effect between the tapered hole and the stopper piston, a relative rotation between a driving shaft system and a driven shaft system can be restrained at a predetermined angular position and it is possible to suppress the occurrence of a striking sound.