Combination valve

Details Combination valve Combination valve

1993-02-05

1994-04-12

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60293, 137506, 13751215, 1376142, 137854, F01N 322, F16K 3112

Patent

active

053015045

ABSTRACT:
A combination valve assembly, particularly for a secondary air blower in internal combustion engines with controlled three-way catalyzer, the combination valve assembly comprises a valve housing having a valve inlet and a valve outlet, a pneumatically actuated valve arranged in the valve housing and having a valve member for locking and releasing a flow path between the valve inlet and the valve outlet, a return valve arranged in the housing downstream of the by-pass valve as considered in a flow direction and having a closing member formed as a leaf spring, a valve plate provided with openings and a stroke catcher limiting an opening stroke arranged so that the leaf spring located between the valve plate and the stroke catcher, a valve closing spring loading the valve member of the valve in a valve closing direction while a differential pressure between a valve inlet pressure and a surrounding pressure loads the valve member of the valve in a valve opening direction. The leaf spring of the return valve has spiral arms formed in it and is clamped between the valve plate and the stroke catcher.

REFERENCES:
patent: 666145 (1901-01-01), Kennedy
patent: 3788071 (1974-01-01), Brewer
patent: 3871175 (1975-03-01), Yamamoto
patent: 3969041 (1976-07-01), Thausing
patent: 4064693 (1977-12-01), Shibata
patent: 4574835 (1986-03-01), Williams
patent: 4630642 (1986-12-01), Detweiler

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