Method for enabling multiple-displacement engine transition to different displacement

Patent 7044107 Issued on May 16, 2006. Estimated Expiration Date:

March 23, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

DaimlerChrysler Corporation

Application

No. 11087416 filed on 03/23/2005

US Classes:

123/362, Cold engine control123/196R, LUBRICATORS123/366, Engine starting or warm-up control123/339.17, Air conditioner operating mode responsive (i.e., compressor on-off)123/396, Resistance or override acts on input connection to regulator123/349Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control)

Examiners

Primary: Kamen, Noah P.
Assistant: Benton, Jason

Attorney, Agent or Firm

Smith; Ralph E.

International Class

F00D 1/00

Abstract

A method for enabling a transition of a multiple-displacement engine to a different engine operating displacement includes determining a temperature measure correlated with an instantaneous engine oil temperature at an engine start-up, for example, a detected engine coolant temperature at engine start-up; determining a start-up delay period based on the temperature measure, as with a lookup table of calibratable values; and enabling a displacement mode transition no earlier than when the engine run time since start-up exceeds the start-up delay period.

Other References

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