Variable valve actuating mechanism for internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorsTsuyoshi Arinaga, Takanobu Sugiyama, Mitsuo Gunji, Shin Ishizaki
Life of this patent
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Abstract
A lift and operating angle varying mechanism is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating a control shaft with an actuator disposed at an end of the control shaft which is rotatably supported by a plurality of bearings. A lubricating oil is supplied to the bearings so as to reduce nonuniformity in temperature distribution of the control shaft in the longitudinal direction.
Claims19
A variable valve actuating apparatus for an internal combustion engine, comprising:
- a lift and operating angle varying mechanism which includes a control shaft extending in a longitudinal direction from a first end to a second end along a cylinder row of the engine, and which is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating the control shaft;
- an actuator disposed at the second end of the control shaft, and arranged to rotate the control shaft;
- and
- a plurality of bearings supporting rotatably the control shaft;
- the control shaft being a hollow shaft including a hollow section extending inside the control shaft in the longitudinal direction, and adapted to receive supply of lubricating oil to lubricate the bearings.
A variable valve actuating apparatus for an internal combustion engine comprising:
- a lift and operating angle varying mechanism which includes a control shaft extending from a first end to a second end in a longitudinal direction along a cylinder row of the engine, and which is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating the control shaft;
- an actuator disposed at the second end of the control shaft, and arranged to rotate the control shaft;
- a plurality of bearings supporting rotatably the control shaft;
- and
- a lubricating oil supply device to supply a lubricating oil to the bearings by discharging the lubricating oil onto an outer surface of the control shaft;
- wherein the lubricating oil supply device is arranged to spray or drop the lubricating oil to the control shaft unevenly in the longitudinal direction of the control shaft so that the supply of the lubricating oil to the outer surface of the control shaft is increased toward the second end of the control shaft.
A variable valve actuating apparatus for an internal combustion engine comprising:
- a lift and operating angle varying mechanism which includes a control shaft extending in a longitudinal direction from a first end to a second end along a cylinder row of the engine, and which is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating the control shaft;
- a plurality of bearings supporting rotatably the control shaft;
- and
- means for supplying a lubricating oil to the bearings so as to reduce nonuniformity in temperature distribution of the control shaft in the longitudinal direction.
Dependencies are inferred from the claim text.