Use of cylinder deactivation to prevent diesel engine runaway
AssigneePACCAR Inc
InventorsNick Hertlein, Maarten Meijer, Steve Ciatti, Charles Wayne Reinhardt Swart
Life of this patent
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Abstract
A method includes detecting a diesel engine runaway event in a diesel engine and, in response to detecting the diesel engine runaway event, deactivating all cylinders in the diesel engine such that no combustion occurs in any cylinders of the diesel engine and no cylinders of the diesel engine produce power, wherein deactivating the cylinders of the diesel engine includes mechanically decoupling a camshaft of the diesel engine from inlet valves of the cylinders of the diesel engine, and wherein deactivating cylinders of the diesel engine prevents flow of air from an intake manifold into combustion chambers of the cylinders.
Claims15
A method, comprising:
- detecting a diesel engine runaway event in a diesel engine;
- and
- in response to detecting the diesel engine runaway event, deactivating cylinders of the diesel engine,
- wherein detecting a diesel engine runaway event in a diesel engine includes comparing, by an engine control unit, a torque requested of the diesel engine to a torque generated by the diesel engine.
A heavy-duty truck, comprising:
- a diesel engine;
- and
- an engine control unit configured to detect a diesel engine runaway event in the diesel engine and, in response to detection of the diesel engine runaway event, deactivate cylinders of the diesel engine,
- wherein the engine control unit is configured to detect a diesel engine runaway event in the diesel engine by comparing a torque requested of the diesel engine to a torque generated by the diesel engine.
Dependencies are inferred from the claim text.