Valve timing controller
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsTaei Sugiura, Eiji Isobe, Takayuki Inohara
Life of this patent
Estimating the term…
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.
Claims10
A valve timing controller for an internal combustion engine which adjusts valve timing of at least one of an intake valve and an exhaust valve opened/closed by a camshaft on the basis of torque transmission from a crankshaft to the camshaft, comprising:
- a first rotational element rotating in association with the crankshaft;
- a second rotational element rotating in association with the camshaft;
- an external gear rotating integrally with the first rotational element;
- an internal gear performing a planetary motion while engaging with the external gear from a direction of an outer periphery of the external gear;
- a guide-rotational element relatively rotating to the first rotational element by receiving the planetary motion of the internal gear, the guide-rotational element being provided with a guide-groove having a constant width and extending on the guide-rotational element;
- a moving element engaging with the guide-groove in such a manner as to slide therein when the guide-rotational element relatively rotates to the first rotational element;
- and
- a phase changing means including a first arm member connected to the first rotational element by a revolute pair, and a second arm member connected to the second rotational element by a revolute pair and the first arm member by a revolute pair through the moving element, the phase changing means changing a relative rotational phase between the first rotational element and the second rotational element by moving the moving element to rotate the first arm member and the second arm member;
- wherein
- when the guide-rotational element relatively rotates with respect to the first rotational element, 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.
A valve timing controller for an internal combustion engine which adjusts valve timing of at least one of an intake valve and an exhaust valve opened/closed by a camshaft on the basis of torque transmission from a crankshaft to the camshaft, comprising:
- a first rotational element rotating in association with the crankshaft;
- a second rotational element rotating in association with the camshaft;
- an internal gear rotating integrally with the first rotational element;
- an external gear performing a planetary motion while engaging with the internal gear from a direction of an inner periphery of the internal gear;
- a guide-rotational element relatively rotating to the first rotational element by receiving the planetary motion of the external gear, the guide-rotational element being provided with a guide-groove having a constant width and extending on the guide-rotational element;
- a moving element engaging with the guide-groove in such a manner as to slide therein when the guide-rotational element relatively rotates to the first rotational element;
- and
- a phase changing means including a first arm member connected to the first rotational element by a revolute pair, and a second arm member connected to the second rotational element by a revolute pair and the first arm member by a revolute pair through the moving element, the phase changing means changing a relative rotational phase between the first rotational element and the second rotational element by moving the moving element to rotate the first arm member and the second arm member;
- wherein
- when the guide-rotational element relatively rotates with respect to the first rotational element, 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.
Dependencies are inferred from the claim text.