SYSTEM AND METHOD OF FAN CONTROL
First Claim
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1. A method to operate an internal combustion engine equipped with an electronic controller having memory and an engine fan, in a vehicle;
- said vehicle equipped with a transmission;
said transmission coupled to said engine and in electronic communication therewith;
said method comprising;
determining separate calibratable minimum engine cooling fan on timers for various engine and transmission operating parameters and requests for engine cooling fan operation as a dynamic engine fan brake;
enabling engine cooling fan operation as a dynamic brake when said engine and transmission operating parameters exceed a predetermined threshold for a predetermined period of time;
disabling engine cooling fan operation as a dynamic brake when an engine fan brake request is no longer active.
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Abstract
A method to operate a vehicle equipped with an electronic controlled internal combustion engine. The engine fan is used as a dynamic fan brake when the vehicle exceeds a minimum predetermined operating parameter for a predetermined period of time, and is disabled once the vehicle is operating within predetermined operating parameters.
33 Citations
12 Claims
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1. A method to operate an internal combustion engine equipped with an electronic controller having memory and an engine fan, in a vehicle;
- said vehicle equipped with a transmission;
said transmission coupled to said engine and in electronic communication therewith;
said method comprising;determining separate calibratable minimum engine cooling fan on timers for various engine and transmission operating parameters and requests for engine cooling fan operation as a dynamic engine fan brake; enabling engine cooling fan operation as a dynamic brake when said engine and transmission operating parameters exceed a predetermined threshold for a predetermined period of time; disabling engine cooling fan operation as a dynamic brake when an engine fan brake request is no longer active. - View Dependent Claims (2, 3, 4, 5, 6)
- said vehicle equipped with a transmission;
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7. A method to operate a vehicle with an internal combustion engine coupled to a transmission;
- said engine and transmission in electronic communication;
said engine equipped with an electronic controller with memory, said engine further equipped with an engine cooling fan, said method comprising;determining whether said vehicle is tinder control of an operator or other engine mode of operation; determining whether said vehicle is operating outside a predetermined parameter for a predetermined period of time; enabling said engine fan to act as a dynamic brake for a time sufficient to conform operation of said vehicle to said predetermined parameters; disabling said engine fan as a dynamic brake when said vehicle is operating within said predetermined parameters. - View Dependent Claims (8, 9, 10, 11, 12)
- said engine and transmission in electronic communication;
Specification