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US 11,092,088 B2Granted
Valve train with cylinder deactivation and compression release
AssigneeCummins Inc.
InventorsAnthony Kyle Perfetto, Anshul Shambhav, Adam C. Cecil, Ryan Edward Schultz
Life of this patent
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Abstract
An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves. A valve train is provided for cylinder deactivation of a first part of the plurality of cylinders and compression release braking on a second part of the plurality of cylinders.
Claims21
A method, comprising:
- operating an internal combustion engine system including an internal combustion engine with a plurality of cylinders that receive a charge flow for combustion of a fuel provided to at least a portion of the plurality of cylinders;
- deactivating a first part of the plurality of cylinders in response to a cylinder deactivation condition;
- and
- braking the internal combustion engine in response to a braking condition, wherein braking the internal combustion engine is distinct from deactivating the first part of the plurality of cylinders and includes adjusting at least an exhaust valve opening and closing timing of a second part of the plurality of cylinders to provide a compression release braking operation, the compression release braking operation including a first compression release braking and a second compression release braking, and wherein braking the internal combustion engine includes increasing a braking amount by switching the second part of the plurality of cylinders from the first compression release braking to the second compression release braking.
1 more element
A system, comprising:
- an internal combustion engine including a plurality of cylinders that receive a charge flow from an intake system and an exhaust system for receiving exhaust gas produced by combustion of a fuel provided to at least a portion of the plurality of cylinders;
- a plurality of sensors operable to provide signals indicating operating conditions of the system;
- a valve actuation mechanism configured to control an opening and closing timing of exhaust valves and intake valves associated with the plurality of cylinders;
- and
- a controller connected to the plurality of sensors operable to interpret one or more signals from the plurality of sensors, wherein the controller, in response to a cylinder deactivation condition, is configured to control the valve actuation mechanism to deactivate a first part of the plurality of cylinders and, in response to a braking condition, adjust a timing of an exhaust valve opening and an exhaust valve closing of a second part of the plurality of cylinders to provide a compression release braking operation, the compression release braking operation including a first compression release braking and a second compression release braking, wherein the controller is configured to increase a braking amount by switching the second part of the plurality of cylinders from the first compression release braking to the second compression release braking.
2 more elements
An apparatus, comprising:
- a controller for connection to a plurality of sensors configured to interpret signals from the plurality of sensors associated with operation of an internal combustion engine, wherein the controller is further configured to determine a cylinder deactivation condition from the signals of the plurality of sensors and provide a cylinder deactivation command to deactivate a first part of a plurality of cylinders of the internal combustion engine in response to the cylinder deactivation condition, and wherein the controller is further configured to determine a braking condition from the signals of the plurality of sensors and provide a braking command to adjust a timing of an exhaust valve opening and an exhaust valve closing of a second part of the plurality of cylinders to provide a compression release braking operation, the compression release braking operation including a first compression release braking and a second compression release braking, wherein the controller is configured to increase a braking amount by switching the second part of the plurality of cylinders from the first compression release braking to the second compression release braking.
Dependencies are inferred from the claim text.