Gm Global Technolgoy Operations, Inc.

Ashish V Gadre

Rajeev Vyas

Stephen Gregory Poulos

William A Powers, Jr

A method for identifying and mapping a maximum instantaneous stall torque capability of a fuel cell cathode valve includes: maintaining a temperature of an electric motor at a predetermined temperature, wherein the predetermined temperature is equal to or less than a freezing point of water (0&#xb0; C.), and the electric motor includes motor brushes, commutator poles, a stator, a rotor rotatable with respect to the stator, and a shaft coupled to the rotor; locking the shaft of the electric motor such that the shaft is incapable of rotating, thereby fixing the shaft at a locked position; mounting the shaft of the electric motor to a dynamometer; supplying electrical energy to the electric motor; monitoring an instantaneous stall torque of the electric motor; and monitoring a rotor electrical resistance.

Identification and mapping of fuel cell cathode valve ice breaking stall torque capability

Reverse gear for a motor vehicle transmission is achieved through a chain assembly having two sprockets and a multi-link chain. One of the sprockets is coupled to a clutch which selectively connects it to an input or output shaft. The other sprocket is directly coupled to the other, i.e., output or input shaft. The multi-link chain carries drive torque from the input shaft to the output shaft when the clutch is engaged. Because the other driving connections between the input shaft and the output shaft associated with the forward gears or gear ratios are through gears which cause a reversal of rotational direction, the driving connection achieved by the chain assembly, without a directional reversal, is, in fact, opposite in direction to the rotational direction of the forward gears, thereby providing reverse.

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Rochester Hills, MI, United States of America

Ashish V Gadre