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US 2017/0363039 A1Published application
Method for controlling variable oil pressure to a piston squirter based on piston temperature
AssigneeGM Global Technology Operations LLC
InventorJONATHAN T. SHIBATA
Life of this patent
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Abstract
A method for controlling variable oil pressure to a piston squirter based on piston temperature according to an exemplary embodiment includes a temperature estimation module and an oil pump pressure control module. The temperature estimation module estimates a piston temperature associated with a cylinder based on engine operating conditions. The oil pump pressure control module controls the oil pressure level delivered to at least one of piston squirter associated with the cylinder to selectively spray oil on the piston based on temperature estimations.
Claims20
A method comprising:
- estimating a piston temperature associated with a cylinder based on engine operating conditions;
- determining if the estimated piston temperature is greater than a predetermined hot temperature threshold;
- and
- controlling an oil pump pressure to at least one piston squirter associated with the cylinder to cause the at least one piston squirter to activate if the estimated piston temperature is greater than the predetermined hot temperature threshold.
1 more element
A system comprising:
- a temperature estimation module that estimates a piston temperature associated with a cylinder based on engine operating conditions;
- at one piston squirter associated with the cylinder;
- and
- an oil pressure control module that controls pressure to the at least one piston squirter, the oil pressure control module being operable to activate the at least one piston squirter if the estimated piston temperature is greater than a predetermined hot temperature threshold.
1 more element
Dependencies are inferred from the claim text.