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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsShoichi Honda, Yoshikatsu Nakano, Hirano Makota, Masaaki Matsuura
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A valve disabling device has an engaging member and an urging member slidably disposed, respectively, in first and second axial bores formed within, respectively, first and second rocker arm means, one of which engages a valve actuating cam. The engaging member is displaceable within the first axial bore by means of pressure applying means, into the second axial bore for driving coupling of the first and second rocker arm means whereby a pair of inlet valves or exhaust valves corresponding to the first and second rocker arm means make valving motions in unison with each other, or out of the second axial bore for disconnection of the first and second rocker arm means from each other to disable part of the valves. Biasing means biases the engaging member into the second axial bore irrespective of operation of the pressure applying means, to correspondingly bias the urging member into a predetermined position where a portion thereof is projected out of the second axial bore. Retaining means holds the urging member in the predetermined position, thus drivingly coupling the two rocker arm means.
In a valve disabling device for use in a valve actuating mechanism of an internal combustion engine, said valve actuating mechanism having cam means, inlet valve means and exhaust valve means, at least one of which comprises a pair of valves, and first and second rocker arm means juxtaposed with each other and engaging said at least one of said inlet valve means and said exhaust valve means, one of said first and second rocker arm means engaging said cam means, said valve disabling device including an engaging member slidably disposed within a first axial bore formed in said first rocker arm means, said engaging member being projectable into and retractable from a second axial bore formed in said second rocker arm means in alignment with said first axial bore, an urging member slidably disposed within said second axial bore, urging means urging said urging member against said engaging member, and pressure applying means for hydraulically forcing said engaging member into said second axial bore against the urging force of said urging means, whereby said first and second rocker arm means are drivingly coupled together to cause said at least one of said inlet valve means and said exhaust valve means to make valving motions in unison with each other, while when said pressure applying means is inoperative, said urging means causes said engaging member to recede from said second axial bore through said urging member to thereby disconnect said first and second rocker arm means from each other;
Dependencies are inferred from the claim text.