Valve operating system for internal combustion engine

Details Valve operating system for internal combustion engine Valve operating system for internal combustion engine

1995-12-18

1997-12-23

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Plural valve trains, single actuator

123 9039, 1231883, F01L 126

Patent

active

056997620

ABSTRACT:
In a valve operating system for an internal combustion engine in which two valves are simultaneously operated by one valve bridge, a roller is fitted to one end of a rocker arm 1, said roller pushing the valve bridge downward. A transverse force produced by the circular motion of the rocker arm merely causes rolling of the roller and is not delivered as a force of moving the valve bridge in the transverse direction. Thus, the valve bridge does not require any guiding mechanism for resisting against the transverse force. In addition, the depression bottom of each of the sleeves of the valve bridge is shaped flat, and the stem end of the valve in contact with the depression bottom is shaped spherical so as to contact the stem and with the depression bottom at one point on the spherical surface. Thus, even when a certain level difference is produced between the stem ends of valves, the contacting manner is not changed except that the contact point migrates to other point and, therefore, no level difference-removing means such as an adjuster are required.

REFERENCES:
patent: 2162063 (1939-06-01), Crawford
patent: 3422805 (1969-01-01), Dzianott
patent: 4327677 (1982-05-01), Vander Bok
patent: 4944257 (1990-07-01), Mills
patent: 5054440 (1991-10-01), Kadokawa
patent: 5410995 (1995-05-01), Bentz et al.

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