| US 7,401,592 B2 | ||
| Hybrid exhaust valve assembly | ||
| Robin Willats, Columbus, Ind. (US); Joseph Callahan, Greenwood, Ind. (US); Kwin Abram, Columbus, Ind. (US); and Govindaraj Kalyanasamy, Indianapolis, Ind. (US) | ||
| Assigned to Emcon Technologies LLC, Wilmington, Del. (US) | ||
| Filed on Apr. 02, 2007, as Appl. No. 11/695,262. | ||
| Application 11/695262 is a continuation in part of application No. 11/602924, filed on Nov. 21, 2006. | ||
| Prior Publication US 2008/0115494 A1, May 22, 2008 | ||
| Int. Cl. F01N 7/00 (2006.01) | ||
| U.S. Cl. 123—323 [123/190.14] | 27 Claims |
| 1. An exhaust valve assembly comprising:
a shaft;
a flapper valve fixed to said shaft and movable relative to an exhaust component housing between a closed position, an intermediate
position, and an open position;
a resilient member biasing said flapper valve toward said closed position;
an electric actuator coupled to said shaft to actively move said flapper valve at least from said closed position to said
intermediate position; and
a coupling mechanism that couples said electric actuator to said shaft, said coupling mechanism allowing said flapper valve
to move to said open position in response to exhaust flow sufficient to overcome a biasing force of said resilient member
without requiring input from said electric actuator.
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