Gm Global Technolgoy Operations, Inc.

Markus Noll

Oliver Maier

A method for validating a pressure sensor between a source of a gas and a pressure regulator that regulates a gas flow. The method includes providing a valve command signal and selecting a bias signal from a bias table. The method also includes comparing the selected bias signal to the valve command signal and determining there is a pressure sensor error if the difference between the selected bias signal and the valve command signal is above a predetermined threshold.

Validation method for pressure sensor signal at electrical controlled high pressure gas storage systems

A control system that prevents an electric vehicle from increasing its speed on a downhill gradient by providing regenerative braking through a traction motor. The system includes an enable circuit that provides an enable signal if certain criteria are met, such as a brake pedal and an acceleration pedal being inactive. The system further includes a controller that is enabled by the enable signal, and receives a vehicle speed signal of the speed of the vehicle. The system also includes a switch that receives the enable signal and the vehicle speed signal. When the enable circuit provides the enable signal, the switch provides a speed set-point to the controller for the last vehicle speed. If the vehicle speed signal goes above the speed set-point, the controller outputs a regenerative braking torque command to the traction motor to reduce the speed of the vehicle to the speed set-point.

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Worms, Germany

Markus Noll