Abstract:
A range extender for a vehicle, comprises an electric machine; an engine; and a controller, wherein the controller is configured to control fuelling of the engine, and is configured to control the electric machine to charge a battery of the vehicle using power from the engine and at other times to control the electric machine to drive the engine using power from the battery, wherein the controller is configured to increase the engine speed by controlling the electric machine to drive the engine using power from the battery whilst substantially not fuelling the engine.
Abstract:
An automotive battery system that includes a lead-acid battery electrically coupled to a first bus, in which the lead-acid battery supplies electrical power to a starter via the first bus to cold crank an internal combustion engine of a vehicle; a lithium-ion battery electrically coupled to a second bus, in which the lithium-ion battery captures and stores electrical energy generated by a regenerative braking system when the vehicle brakes and supplies electrical power to the second bus using the electrical energy captured from the regenerative braking system such that a first portion of the second electrical power is supplied to an electrical system; and a DC/DC converter electrically coupled between the first bus and the second bus, in which the DC/DC converter controls supply of a second portion of the second electrical power to charge the lead-acid battery.
Abstract:
A multi-engine locomotive configuration is disclosed wherein engine outputs to DC traction motors are controlled by connecting the alternators with rectifiers in series for each engine of a multi-engine locomotive. This configuration uses the minimum number of rectifying diodes, eliminates the need for chopper circuits and simplifies the method of controlling the sequencing and output of two or more engines. The approach, which reduces the parasitic power loss by reducing the number of diodes, also enables a simplified means to efficiently manage engine cooling without additional cost and complexity of electrically-driven radiator fans.
Abstract:
A system for powering a vehicle includes a traction bus, an auxiliary bus, chopper devices, and a control unit. The traction bus is coupled with traction motors of the vehicle to supply a first voltage to power the traction motors. The auxiliary bus is coupled with non-traction motors of the vehicle to supply a different, second voltage to the non-traction motors to. The chopper devices are conductively coupled with both the traction bus and the auxiliary bus to control conduction of the first voltage on the traction bus to the auxiliary bus as the second voltage using first and second duty cycles. The control unit is coupled with the chopper devices to control the first and second duty cycles of the chopper devices, respectively, such that the first voltage on the traction bus is changed (e.g., reduced) to the second voltage on the auxiliary bus.
Abstract:
Verfahren zum Starten einer Verbrennungskraftmaschine, insbesondere eines Hub- oder Kreiskolbenmotors in einem Elektrofahrzeug zur internen Energieerzeugung, wobei dieses Verfahren wenigstens die Schritte aufweist: - Antreiben der Verbrennungskraftmaschine mittels des Generators, - Verdichten eines Arbeitsmediums, insbesondere von Luft, in diesem Brennraum, - Messen einer Vorwärmtemperatur, insbesondere in der Brennraumwandung, - Starten der Drehmomentübertragung von der Verbrennungskraftmaschine auf den Generator nachdem die Vorwärmtemperatur einen vorgebbaren Schwellwert (Starttemperatur) erreicht oder überschritten hat.
Abstract:
Verfahren zum Betrieb eines Elektrofahrzeugs mit Range-Extender, wobei dieses Elektrofahrzeug einen elektrischen Antriebsmotor, einen Stromerzeugungs-Verbrennungsmotor, einen elektromechanischen Energiewandler und eine elektrische Energiespeichereinrichtung aufweist. In diesem Verfahren wird der tatsächliche Ladezustand der elektrischen Energiespeichereinrichtung detektiert, dieser wird mit einem Schwellenwert für den Ladezustand verglichen, wobei dieser Schwellenwert oberhalb eines unteren Grenzwertes liegt, der Stromerzeugungs-Verbrennungsmotor wird zur Erzeugung elektrischer Energie herangezogen, wenn der detektierte Ladezustand diesen Schwellenwert erreicht beziehungsweise unterschreitet, wobei durch diese Energieerzeugung die Verringerung des Ladezustandes im Wesentlichen gestoppt oder wenigstens verlangsamt wird.