Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2005-09-28
2009-08-25
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090450, C123S090540
Reexamination Certificate
active
07578276
ABSTRACT:
An automatic tappet clearance adjusting device, comprising an adjusting unit adjusting the projected amount of a rocker arm by advancing and retreating an adjust screw to and from the tip of the rocker arm, a pressure setting part electrically controlling the pressure of an air supply source part based on the measurement signals of a primary side pressure sensor measuring the pressure of the air supply source part so that the pressure becomes a specified one, a supply pipeline allowing the air supply source part to communicate with a combustion chamber through a variable orifice, and a control mechanism part controlling the adjusting unit based on measurement signals of a secondary side pressure sensor measuring the pressure of the supply pipeline. The pressure is set to 1.5 kPa by the pressure setting part and the variable orifice.
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Handa Takehisa
Matsuura Jun-ichi
Tsuyoshi Tomoaki
Carrier Blackman & Associates P.C.
Chang Ching
Honda Motor Co. Ltd.
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