Multi-cycle, engine braking with positive power valve actuation control system and process for using the same
AssigneeDiesel Engine Retarders, Inc.
InventorsGheorghe Cosma, James Usko
Life of this patent
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Abstract
An apparatus and method for effectuating multi-cycle engine braking is disclosed. The present invention controls the operation of the engine valves to permit more than one compression release event during a single engine operating cycle. The apparatus includes an assembly for operating at least one exhaust valve of an engine cylinder during a positive power operation. The apparatus further includes an assembly for operating at least one intake valve of the engine cylinder. The apparatus further including an assembly for operating the at least one exhaust valve during an engine braking operation.
Claims21
An apparatus for performing multi-cycle engine braking, said apparatus comprising:
- exhaust valve operating means for operating at least one exhaust valve of an engine cylinder during a positive power engine operation;
- intake valve operating means for operating at least one intake valve of the engine cylinder;
- and
- braking means for operating the at least one exhaust valve of the engine cylinder during an engine braking operation, wherein said braking means accomplishes at least two braking operations for the at least one exhaust valve per engine cycle during the engine braking operation, wherein said intake valve operating means delays the operation of the at least one intake valve during the engine braking operation.
A method of performing multi-cycle engine braking, said method comprising the steps of:
- performing a first compression release event, wherein said first compression release event includes the steps of opening at least one exhaust valve to effectuate engine braking and closing the at least one exhaust valve after predetermined time, wherein said step of opening the at least one exhaust valve to effectuate engine braking during said first compression release event is initiated prior to compression top dead center;
- performing a second compression release event, wherein said second compression release event includes opening the at least one exhaust valve to effectuate engine braking, and closing the at least one exhaust valve after predetermined time, wherein said step of opening the at least one exhaust valve to effectuate engine braking during said second compression release event is initiated prior to exhaust top dead center;
- and
- delaying the opening of at least one intake valve for a predetermined time during engine braking.
Dependencies are inferred from the claim text.