Abstract: An electronic control unit includes a housing and an interface extending across the housing including a plurality of interface pins accessible at an exterior of the housing and at an interior of the housing. A circuit board is disposed in the housing. A plurality of conductive traces are operatively coupled with the circuit board and extending between a plurality of discrete component footprints. A microcontroller is positioned on the microcontroller footprint and includes an input pin conductively coupled with a first conductive trace. An input terminal positioned on the input terminal footprint and conductively coupled with a second conductive trace and one of the plurality of interface pins. A flexible input signal conditioning (FISC) circuit comprising a plurality of discrete components positioned on respective discrete component footprints and conductively coupled with respective sets of the plurality of conductive traces.

Abstract: An electronic control includes a housing and an interface extending across the housing. A circuit board disposed in the housing includes a frequency input pin operatively coupled with the interface and an analog input pin operatively coupled the interface. A first conductive trace is operatively coupled with the frequency input pin. A second conductive trace operatively coupled with the analog input pin. A microcontroller is mounted on the circuit board and includes a selectably configurable input operatively coupled at least one of the first conductive trace and the second conductive trace. The microcontroller is configured to process at least one of a frequency signal received via the frequency input pin and an analog signal received at the analog input pin.

Abstract: An electronic control unit includes a housing and an interface extending across the housing including a plurality of interface pins accessible at an exterior of the housing and at an interior of the housing. A circuit board is disposed in the housing. A plurality of conductive traces are operatively coupled with the circuit board and extending between a plurality of discrete component footprints. A microcontroller is positioned on the microcontroller footprint and includes an input pin conductively coupled with a first conductive trace. An input terminal positioned on the input terminal footprint and conductively coupled with a second conductive trace and one of the plurality of interface pins. A flexible input signal conditioning (FISC) circuit comprising a plurality of discrete components positioned on respective discrete component footprints and conductively coupled with respective sets of the plurality of conductive traces.

Abstract: One embodiment of the present invention includes an internal combustion engine with a turbocharger. The turbocharger includes a compressor with an outlet coupled to an intake of the engine and a turbine coupled to an exhaust manifold of the engine. A a turbocharger speed estimate is determined from engine speed and a ratio between inlet and boost pressure for the compressor. The turbocharger speed estimate is further adjusted as a function of compressor boost pressure variation with time.