What Is Torque Converter Flash?
A torque converter refers to a coupling device designed to transfer rotating power from an internal combustion engine to a rotating load. Torque converters provide maximum torque during the stall phase, which can result in temporary flash stall.
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Torque Converters
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Torque converters are fluid coupling devices that essentially take the place of a mechanical clutch. The torque converter allows the load to be separated from the power source and enables torque to be multiplied based on differences between output and input rotational speed.
Stalls
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Stall refers to one of three phases of torque converter operation. Stall occurs when the power is applied to the pump but the turbine can't spin or rotate, which can occur when the transmission is in gear but the operator is depressing the brake pedal to prevent vehicle movement. The torque converter supplies maximum torque multiplication if high input power is supplied during the stall phase.
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Flash Stall
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Flash stall refers to the maximum that engine torque can stall the converter, or the maximum revolutions per minute the engine accelerates to after launched from rest at wide open throttle. A torque converter will often flash briefly to an accelerated RPM and then decrease to its true stall speed.
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- Photo Credit sand car engine image by Clarence Alford from Fotolia.com
