Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1996-03-15
1998-01-20
Wolfe, Willis R.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60277, 60301, 60303, F01N 318, F01N 336
Patent
active
057090807
ABSTRACT:
A method and apparatus for determining a leak in an HC fluid supply of an exhaust purification system for an engine is disclosed. The fluid supply includes an injector that injects an amount of a NOx reducing fluid, a tank that holds the NOx reducing fluid, and a pump that pressurizes the NOx reducing fluid. The system fluid pressure is read before and after the pump is shut off. The pressure readings are compared and the exhaust purification system is turned off in response to the difference between the pressure readings being greater than a predetermined value.
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Arora Amit
Bivens Ward L.
Krahn Darren L.
Peterson Randy N.
Caterpillar Inc.
Masterson David M.
Wolfe Willis R.
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