Method and apparatus for controlling CVVT of an engine
First Claim
Patent Images
1. A method for controlling CVVT of a vehicle engine, comprising:
- calculating an estimated oil temperature on the basis of a coolant temperature at starting of the engine and a period of time that has elapsed after the starting of the engine;
storing the estimated oil temperature in a memory; and
controlling the CVVT based on the estimated oil temperature.
1 Assignment
0 Petitions
Accused Products
Abstract
Controlling of a CVVT can be improved by controlling the CVVT based on an estimated oil temperature, the estimated oil temperature being calculated on the basis of a coolant temperature at starting of the engine and a period of time that has elapsed after the starting of the engine.
-
Citations
20 Claims
-
1. A method for controlling CVVT of a vehicle engine, comprising:
-
calculating an estimated oil temperature on the basis of a coolant temperature at starting of the engine and a period of time that has elapsed after the starting of the engine;
storing the estimated oil temperature in a memory; and
controlling the CVVT based on the estimated oil temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13)
-
-
10. An apparatus for controlling CVVT of a vehicle engine, comprising:
-
a coolant temperature detector for detecting coolant temperature of the engine; and
an electronic control unit that is activated by predetermined software, the electronic control unit being equipped with a timer and a memory, wherein the predetermined software comprises instructions for;
calculating an estimated oil temperature on the basis of a coolant temperature at starting of the engine and a period of time that has elapsed after the starting of the engine;
storing the estimated oil temperature in the memory; and
controlling the CVVT based on the estimated oil temperature. - View Dependent Claims (11, 12, 14, 15, 16, 17, 18)
-
-
19. A method for controlling valve timing of an engine, comprising:
-
measuring coolant temperature at starting of an engine;
measuring elapsed time following starting of the engine;
calculating an estimated oil temperature based on said coolant temperature at starting of the engine and said elapsed time;
storing said estimated oil temperature in an memory; and
controlling a CVVT based on said estimated oil temperature.
-
-
20. An apparatus for controlling valve timing of an engine, comprising:
-
a detection unit configured for at least detecting a temperature of coolant of an engine at starting of the engine;
an electronic control unit comprising;
a timer configured to calculate an amount of elapsed time post starting;
a memory configured to store data from said detection unit and said timer;
preprogrammed software configured to;
estimate oil temperature of the engine based on the detected coolant temperature at starting of the engine by said detection unit, the amount of elapsed time post starting, and data stored in the memory; and
control a CVVT of the engine based on said estimated oil temperature.
-
Specification