Conventional Powertrain


The conventional powertrain is composed of an internal combustion engine paired with the transmission. This system has made tremendous advances in the last decade with respect to efficiency improvements and the advancement and adoption of technologies such as dual overhead camshaft (DOHC) engine configurations, variable valve timing (VVT) engines, stop/start engines, high gear ratio automatic transmissions, continually-variable transmissions (CVT), and double-clutch transmissions (DCT). The automotive industry’s continual push for fuel-consumption and carbon dioxide emissions reductions has presented a number of technical challenges for the sensing systems required to support these platforms. Allegro’s sensor ICs have led the way in the market for these technologies:

  • DOHC, VVT engine configurations require TPOS-cam sensor ICs capable of high accuracy immediately upon startup.
  • Stop/start engines require a crankshaft sensor ICs capable of detecting direction changes to allow for absolute rotational position information of the crankshaft independent of speed or temperature changes, in addition to the need for a neutral gear detection sensor IC to enable the function in the car
  • Transmission advancements require speed sensors for intermediate gear speed detection and speed and direction sensor ICs for transmission output sensing to enable other technologies such as hill hold.




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