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US 7,461,629 B2Granted
Exhaust brake control system
AssigneeHolset Engineering Company Limited
InventorsKenneth Ball, Pierre B French
Life of this patent
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Abstract
A control system for an exhaust brake which operates to impede exhaust flow from a turbocharged combustion engine when the engine throttle is closed. The control system includes means for delaying application the exhaust brake only when the vehicle throttle is closed to allow the rotational speed of the turbo charger to drop thereby reducing wear to seal components.
Claims8
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.
3 more elements
Dependencies are inferred from the claim text.