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AssigneeINERGY AUTOMOTIVE SYSTEMS RESEARCH (Societe Anonym
InventorsJean-Baptiste Gouriet, Jean-Claude Habumuremyi, Stephane Leonard, Volodia Naydenov
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Process for starting an SCR system intended for transporting urea from a tank to the exhaust gases of an engine using a feed line, this system comprising a rotary pump controlled by a controller and driven by a brushless direct current (BLDC) motor that comprises a rotor equipped with at least one permanent magnet and with a stator comprising at least 3 electromagnetic coils in which the direct current can flow according to a given sequence to make the rotor rotate, according to which, before starting the pump, a temperature is measured using a sensor and if this temperature is below a setpoint temperature, before making the rotor rotate, the current is passed through at least one of the coils in a way such that it preheats the pump without making the rotor rotate.
A process for starting an SCR system intended for transporting urea from a tank to the exhaust gases of an engine using a feed line, this system comprising a rotary pump controlled by a controller and driven by a brushless direct current (BLDC) motor that comprises a rotor equipped with at least one permanent magnet and with a stator comprising at least 3 electromagnetic coils in which the direct current can flow according to a given sequence to make the rotor rotate, according to which, before starting the pump, a temperature is measured using a sensor and if this temperature is below a setpoint temperature, before making the rotor rotate, the current is passed through at least one of the coils in such a way such that it preheats the pump without making the rotor rotate.
An SCR system for a motor vehicle comprising a liquid pump suitable for a process according to any one of the preceding claims and having a BLDC-type drive motor that comprises a rotor equipped with at least one permanent magnet and a stator comprising at least 3 electromagnetic coils, this motor being controlled by a system that makes it possible to make a current flow into at least one of the coils without causing the rotor to rotate.
Dependencies are inferred from the claim text.