| US 7,461,629 B2 | ||
| Exhaust brake control system | ||
| Kenneth Ball, Huddersfield (United Kingdom); and Pierre B French, Holmfirth (United Kingdom) | ||
| Assigned to Holset Engineering Company, Ltd., Huddersfield (United Kingdom) | ||
| Filed on Dec. 13, 2005, as Appl. No. 11/300,666. | ||
| Application 11/300666 is a division of application No. 10/366994, filed on Feb. 14, 2003, granted, now 7,004,142. | ||
| Claims priority of application No. 0203490.8 (GB), filed on Feb. 14, 2002. | ||
| Prior Publication US 2006/0118081 A1, Jun. 08, 2006 | ||
| Int. Cl. F02D 9/06 (2006.01); F02D 23/00 (2006.01) | ||
| U.S. Cl. 123—323 [60/602] | 8 Claims |
| 1. A system comprising:
an engine operable to produce exhaust gas;
an engine throttle operable for opening and closing;
a turbocharger operable to receive at least a portion of said exhaust gas;
an exhaust brake selectively operable to impede the exhaust gas from said turbocharger; and
a control system operable to delay application of said exhaust brake for a period of time following closing of said engine
throttle, wherein said period of time is a function of the rotational speed of the turbocharger immediately prior to closing
of said throttle.
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