A drivetrain 10 for an electric propulsion system includes: a first motion shaft 12 for connection to a first electric motor 50; a second motion shaft 14; at least two speed variation stages 16, 18 (e.g. a pair of gears, pulleys, sprockets or friction wheels) arranged between the first and second motion shafts; and a selector arrangement having first and second modes for selectively utilising one or more of the speed variation stages. In the first mode, rotational energy of the first shaft is transmitted to the second shaft via the two speed variation stages 16, 18, when in use. In the second mode, rotational energy of the first shaft is transmitted to the second shaft exclusively via the first speed variation stage 16, when in use. The selector arrangement may include a third mode, in which rotational energy of the first shaft is transmitted to the second shaft exclusively via the second speed variation stage 18, when in use. A third motion shaft may be: connected to a second electric motor; permanently connected to the first speed variation stage; and selectively connectable to the first shaft. The drivetrain may form part of an electric powertrain which further includes an electric motor, differential and wheel axle, wherein the electric motor is connectable to the first shaft and the second shaft is connectable to the differential.
Drivetrain
2022-10-19
Patent
Electronic Resource
English
IPC: | F16H Getriebe , GEARING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
British Library Online Contents | 2015