Valve control means
First Claim
1. Valve control means for controlling valve means of an internal combustion engine comprising:
- cam means comprising a rotatable camshaft having a first cam member and a lobe of circular axial cross-section,transmitting means for transmitting reciprocating movement to the valve means from said cam means, said transmitting means comprising a first follower member in engagement with said valve means and a second follower member movable relative to said first follower, andlocking means to enable said follower members to be linked so as to move together, whereinwhen the follower members are not linked by the locking means the valve means is controlled by the first follower member in engagement with and following the profile of the lobe of circular cross-section andwhen the follower members are linked by the locking means the valve means is controlled by the second follower member in engagement with and following the profile of the first cam member and whereinthe second follower member has a bore therethrough and the first follower member is in the form of an inner member located within the bore, said first follower member being movable in the bore relative to the second follower member when the follower members are not linked to move together.
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Accused Products
Abstract
The invention relates to valve control for an internal combustion engine. The valve control includes a valve, a first camshaft having a first cam member and a second cam member having a different profile from the first cam member and a cam follower assembly for transmitting reciprocating movement to the valve from the cam. The cam follower assembly includes a first cam follower member in engagement with the valve and a second cam follower member movably relative to the first cam follower member, and locking means to enable the follower members to be linked to move together. When the follower members are not linked the valve means is controlled by the first cam follower member in engagement with and following the profile of the first cam member and when the follower members are linked the valve is controlled by the second cam follower member in engagement with and following the profile of the second cam member. One of the cam members having a circular axial cross-section to enable valve deactivation.
29 Citations
26 Claims
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1. Valve control means for controlling valve means of an internal combustion engine comprising:
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cam means comprising a rotatable camshaft having a first cam member and a lobe of circular axial cross-section, transmitting means for transmitting reciprocating movement to the valve means from said cam means, said transmitting means comprising a first follower member in engagement with said valve means and a second follower member movable relative to said first follower, and locking means to enable said follower members to be linked so as to move together, wherein when the follower members are not linked by the locking means the valve means is controlled by the first follower member in engagement with and following the profile of the lobe of circular cross-section and when the follower members are linked by the locking means the valve means is controlled by the second follower member in engagement with and following the profile of the first cam member and wherein the second follower member has a bore therethrough and the first follower member is in the form of an inner member located within the bore, said first follower member being movable in the bore relative to the second follower member when the follower members are not linked to move together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification