ENGINE FRICTION BASED OIL VISCOSITY MONITOR
First Claim
1. A powertrain control module that determines engine oil properties based on friction in an engine, comprising:
- an engine combustion module that models engine torque based on engine speed and engine pumping losses due to intake and exhaust gasses,a transmission module that models transmission torque applied to the engine based on transmission speed and gear,an accessory loads module that models torque applied to the engine by accessory loads including at least one of a power steering pump, an air conditioning compressor, a water pump, and an alternator; and
an oil viscosity module that determines engine oil viscosity based on a friction torque and predetermined engine data that coincides with reference oils and wherein the friction torque is based on the engine torque, transmission torque, and accessory loads torque.
2 Assignments
0 Petitions
Accused Products
Abstract
A powertrain control module determines engine oil properties based on friction in an engine. The powertrain control module includes an engine combustion module that models engine torque based on engine speed and engine pumping losses due to intake and exhaust gasses. A transmission module models transmission torque applied to the engine based on transmission speed and gear. An accessory loads module models torque applied to the engine by accessory loads including at least one of a power steering pump, an air conditioning compressor, a water pump, and an alternator. An oil viscosity module determines engine oil viscosity based on a friction torque and predetermined engine data that coincides with reference oils. The friction torque is based on the engine torque, transmission torque, and accessory loads torque.
-
Citations
18 Claims
-
1. A powertrain control module that determines engine oil properties based on friction in an engine, comprising:
-
an engine combustion module that models engine torque based on engine speed and engine pumping losses due to intake and exhaust gasses, a transmission module that models transmission torque applied to the engine based on transmission speed and gear, an accessory loads module that models torque applied to the engine by accessory loads including at least one of a power steering pump, an air conditioning compressor, a water pump, and an alternator; and an oil viscosity module that determines engine oil viscosity based on a friction torque and predetermined engine data that coincides with reference oils and wherein the friction torque is based on the engine torque, transmission torque, and accessory loads torque. - View Dependent Claims (2, 3, 4, 5)
-
-
6. The powertrain control module of claim 6 wherein the oil viscosity module determines a viscosity interpolation factor based on the friction torque and the expected friction torques and calculates the estimated viscosity based on the viscosity interpolation factor and the viscosities of the reference engine oils of the first viscosity and the second viscosity, respectively, at a given engine speed and oil temperature.
-
7. A method of determining engine oil properties based on friction in an engine, comprising:
-
modeling engine torque based on engine speed and engine pumping losses due to intake and exhaust gasses, modeling transmission torque applied to the engine based on transmission speed and gear, modeling torque applied to the engine by accessory loads including at least one of a power steering pump, an air conditioning compressor, a water pump, and an alternator; determining engine oil viscosity based on a friction torque and predetermined engine data that coincides with reference oils; and determining friction torque based on the engine torque, transmission torque, and accessory loads torque. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A powertrain control module that determines engine oil properties based on friction in an engine, comprising:
-
engine combustion means for modeling engine torque based on engine speed and engine pumping losses due to intake and exhaust gasses, transmission means for modeling transmission torque applied to the engine based on transmission speed and gear, accessory loads means for modeling torque applied to the engine by accessory loads including at least one of a power steering pump means for power steering, air conditioning compressor means for air conditioning, water pump means for pumping coolant, and alternator means for charging a battery; and oil viscosity means for determining engine oil viscosity based on a friction torque and predetermined engine data that coincides with reference oils and wherein the friction torque is based on the engine torque, transmission torque, and accessory loads torque. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification