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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsAkifumi Nomura, Yasuo Shimura, Akira Tokito, Kazuhisa Takemoto
Estimating the term…
In a decompression unit including a decompression arm, a decompression unit for internal combustion engine is provided in which the followability in the opening-and-closing operation of the air intake valve or the exhaust valve with respect to the cam at high-revolution speeds is satisfactory without increasing the equivalent inertia weight of the valve driving system, and for lowering the cost. A decompression unit includes a first decompression cam that takes the operating position when the number of revolutions of the engine is not more than the predetermined number of revolution during startup. A second decompression cam is provided that takes the operating position by manual operation. A decompression arm includes first and second abutting portions that abut against first and second decompression cams, respectively. An adjusting screw is provided for pressing the rocker arm and a resilient member for bringing the first abutting portion of the decompression arm into abutment against the first decompression cam. The decompression arm pivoted by the first and the second decompression cams pivots the rocker arm via the adjusting screw to open the exhaust valve.
An internal combustion engine including an air intake valve and an exhaust valve wherein a rocker arm is pivoted by a cam provided on a cam shaft driven by a crankshaft for opening and closing the air intake valve or the exhaust valve and including a decompression unit comprising:
The decompression unit for an internal combustion engine according to clam 1, wherein the decompression unit comprises a second decompression cam for manual operation, the decompression arm includes a second abutting portion that abuts against the second decompression cam, and the decompression arm is pivoted against the resilient force by the above-described second decompression cam located at the operating position for pivoting the rocker arm via the pressing portion to open the air intake valve or the exhaust valve.
A decompression unit for an internal combustion engine having an air intake valve and an exhaust valve comprising:
The decompression unit for an internal combustion engine according to clam 8, wherein the decompression unit includes a manually operated a second decompression cam, the follower includes a second abutting portion that abuts against the second decompression cam, and the follower is pivoted against the resilient force by the above-described second decompression cam located at the operating position for pivoting the rocker arm via the pressing portion to open the air intake valve or the exhaust valve.
Dependencies are inferred from the claim text.