Gm Global Technolgoy Operations, Inc.

Massimo Lucano

Paolo Casasso

Filippo Parisi

Marcello Chiaberge

Mirko Degiuseppe

Gianluca Botto

A hysteresis-type electronic controlling device is provided for fuel injectors that includes, but is not limited to a power driving unit for driving the fuel injectors with an electric signal, a control stage connected to the power driving unit and a sensing stage fed by the power driving unit and feeding the control stage, the device has a feedback frequency control stage for measuring a waveform period of the signal feeding the fuel injectors; the feedback frequency control stage is fed by the control stage with an electric signal. A fuel injector control method is also provided that includes, but is not limited to driving fuel injectors with an electric signal coming from a power driving unit fed by a control stage , sensing the signal with a sensing stage, and measuring a waveform period of the signal through the feedback frequency control stage.

Hysteresis-type electronic controlling device for fuel injectors and associated method

A method is provided for estimating the temperature in an internal combustion engine. The method includes, but is not limited to the steps of providing a sensor resistor (RTD) in the internal combustion engine, the sensor resistor (RTD) having a predetermined resistance-temperature characteristic, measuring a sensor voltage (V) across the sensor resistor (RTD), calculating a resistance value of the sensor resistor (RTD) based on the sensor voltage (V) and estimating the temperature using the resistance value and the resistance-temperature characteristic. The method further comprises the steps of connecting, in series to the sensor resistor (RTD), a first branch of a current mirror arrangement, connecting a reference resistor (R) in series to a second branch of the current mirror arrangement, measuring a reference voltage (V) across the reference resistor (R) and calculating the resistance value of the sensor resistor (RTD) based on the sensor voltage (V) and the reference voltage (V).

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Alessandria, Italy

Massimo Lucano