Variable blower controller for vehicle
First Claim
1. A microprocessor-based variable blower controller for use in a climate control system of a vehicle comprising:
- a field effect transistor;
a temperature sensor in proximity to said field effect transistor and operable to sense a temperature and generate a temperature signal indicative of the temperature; and
a microprocessor operable to control a blower motor of the climate control system of the vehicle via a pulse width modulation output of said microprocessor, said microprocessor receiving said temperature signal from said temperature sensor, said microprocessor being operable to adjust said pulse width modulation output in response to said temperature signal.
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Accused Products
Abstract
A variable blower controller for controlling the blower speed of a climate control system of a vehicle includes a microprocessor which is operable to variably control the blower speed of a blower motor of the climate control system. The variable blower controller provides for smart power management of the blower to avoid high-power dissipative modes when system temperatures are above “safe” levels. The smart power management objective is met by keeping the field effect transistor junction temperature away from design limits or threshold levels where possible. The microprocessor utilizes software and may use a combination of inputs to calculate these levels.
43 Citations
13 Claims
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1. A microprocessor-based variable blower controller for use in a climate control system of a vehicle comprising:
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a field effect transistor;
a temperature sensor in proximity to said field effect transistor and operable to sense a temperature and generate a temperature signal indicative of the temperature; and
a microprocessor operable to control a blower motor of the climate control system of the vehicle via a pulse width modulation output of said microprocessor, said microprocessor receiving said temperature signal from said temperature sensor, said microprocessor being operable to adjust said pulse width modulation output in response to said temperature signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification