Patent ID: 9694647
Date: 2017-07-04
CPC Classifications: B60H,H02H,Y02T

Claim:
1. A vehicle relay for reducing an initial start-up current to a fan motor upon activation of a vehicle climate control system comprising: a power source; at least one input terminal connectable to said power source; an output terminal connected to the fan motor; a microprocessor electrically connected to the input terminal, said microprocessor programmed with a predetermined time delay upon receipt of current; a plurality of transistors electrically connected to an output of the microprocessor; a bypass circuit electrically connected to an output of the relay, the bypass circuit including a relay coil and a switch movable from an open position to a closed position in response to activation of the transistors, said output terminal also being connected to an output of said bypass circuit; a negative temperature coefficient (NTC) resistor electrically connected between the input terminal and the output terminal; said switch of said bypass circuit being open when power is initially applied to said input terminal so that current flows through the NTC resistor to the output terminal and to the motor, said NTC resistor reducing an initial start-up current that is input to the motor upon activation of the climate control system; said microprocessor delaying activation of said transistors for said predetermined time delay after which said microprocessor activates the transistors which activates the bypass relay to close the switch; upon closure of said switch, said NTC resistor being bypassed to allow maximum operating voltage from said power source to be applied to the motor through said bypass relay.