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Device for maintaining voltage during startup for a motor vehicle

  • US 9,726,136 B2
  • Filed: 12/19/2012
  • Issued: 08/08/2017
  • Est. Priority Date: 12/22/2011
  • Status: Active Grant
First Claim
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1. Device for maintaining voltage (DMT), designed to be associated with a rotary electrical machine (AD) which fulfils a function of starting of the thermal engine of a motor vehicle, this device (DMT) being designed, when the thermal engine is started, to supply an additional voltage for an electrical supply of the rotary electrical machine (AD), this additional voltage being added to a nominal voltage of the on-board electrical network (RB) of the vehicle which is supplied by a battery (BAT) contained in the vehicle as the main source of voltage, with the device comprising a second source of voltage (Ucap) and first and second electronic switches (K1, K2), each comprising at least one transistor of the MOSFET type, wherein at least one MOSFET transistor (K2, K2n

  • ) of the switches, is mounted in series with the second source of voltage (Ucap), the device further comprising an ECU configured to control the at least one MOSFET transistor of the switches wherein the ECU controls the at least one MOSFET transistor of the switches in linear mode at the end of starting of the thermal engine.

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