High-low speed range switching type valve mechanism for internal combustion engine
This invention relates to a high-low speed range switching type valve mechanism for an internal combustion engine and more particularly to an improved and simplified arrangement for selectively varying the lift of a valve in response to engine conditions. Several embodiments of variable valve lift m...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
19.11.2002
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| Online Access | Get full text |
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| Summary: | This invention relates to a high-low speed range switching type valve mechanism for an internal combustion engine and more particularly to an improved and simplified arrangement for selectively varying the lift of a valve in response to engine conditions.
Several embodiments of variable valve lift mechanisms employing rocker arms that cooperate with high and low speed cam lobes and which are selectively coupled or uncoupled so as to operate the valve dependent upon either the low speed cam lobe configuration or the high speed cam lobe configuration. The construction is such that there are no bending loads placed on the valve stems and the actuating mechanism is relatively light and can be carried at least in part independently of the rocker arms so as to reduce the reciprocating masses and improve engine performance. |
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