A hybrid power train structure for off-road vehicles (ATVs, UTVs and SSVs) uses an internal combustion engine (ICE) rotating a crankshaft through a continuously variable transmission (CVT) as a primary source of locomotion torque, but also includes a driving/generator motor which, in certain established conditions, can either provide an additional or alternative source of locomotion torque or can harvest electricity from the torque created by the internal combustion engine. The driving/generator motor is an axial flux motor of small size for its relative torque output, which can either be directly coupled to the CVT output shaft or, when additionally used as a starter motor for the ICE in an automatic ICE starting and stopping routine.

The disclosure is related to an electric wheel, adapted to a wheel shaft. The electric wheel includes a wheel body, a battery holder, and at least one battery module. The wheel body has a wheel hub configured to be rotatably disposed on the wheel shaft. The battery holder includes a base and at least one first electrical connector connected to each other. The base is configured to be connected to the wheel shaft and disposed side by side to the wheel hub. The base has an outer surface facing away from the wheel shaft. The at least one battery module includes at least one battery storage and at least one second electrical connector. The at least one battery storage has an inner surface in contact with the outer surface of the base. The at least one second electrical connector is detachably mounted on the at least one first electrical connector.

The disclosure is related to an electric wheel, adapted to a wheel shaft. The electric wheel includes a wheel body, a battery holder, and at least one battery module. The wheel body has a wheel hub configured to be rotatably disposed on the wheel shaft. The battery holder includes a base and at least one first electrical connector connected to each other. The base is configured to be connected to the wheel shaft and disposed side by side to the wheel hub. The base has an outer surface facing away from the wheel shaft. The at least one battery module includes at least one battery storage and at least one second electrical connector. The at least one battery storage has an inner surface in contact with the outer surface of the base. The at least one second electrical connector is detachably mounted on the at least one first electrical connector.

An apparatus with an electric motor including a stator and a rotor; a shaft secured to the rotor; a gearing assembly coupled with the shaft; and a housing assembly defining a non-partitioned interior space housing both the electric motor and gearing assembly. The shaft may be unsupported by bearing assemblies and/or free of oil seals and similar sealing engagements between the electric machine and gearing assembly. The motor may be an axial flux motor having a single stator. The gearing assembly may be a planetary reduction gear assembly with a sun gear mounted on the shaft. The apparatus may include only a single electric motor or include a second electric motor and second gearing assembly. The embodiments having a single motor may be used to drive a fan or a vehicle wheel. The embodiments having two motors may be used as a differential drive.

A rotor including a rotor core and magnetic pole parts provided therein is provided. The magnetic pole parts are lined up along an outer circumferential surface of the rotor core. Each magnetic pole part includes a fixed magnetic-force magnet with a radially-oriented magnetizing direction, first variable magnetic-force magnets with circumferentially-oriented magnetizing directions, a first cavity part formed in the rotor core to extend between a position radially inward of the fixed magnetic-force magnet and a position radially inward of the first variable magnetic-force magnet, and auxiliary fixed magnetic-force magnets disposed on both sides of the fixed magnetic-force magnet in a circumferential direction so that magnetizing directions thereof are oriented in the circumferential direction. A pole surface with the same polarity as a pole surface facing radially outward of the fixed magnetic-force magnet is located on a fixed magnetic-force magnet side of the auxiliary fixed magnetic-force magnets.

A method controls the startup of a heat engine of a hybrid power train of a vehicle. The power train includes the heat engine and an electric drive machine, two concentric main shafts coupled one to the heat engine and one to the electric machine, at least one step-down gear of each of the main shafts on a secondary shaft connected to wheels of the vehicle, and a coupling of the two main shafts. The method includes coupling the two main shafts, inhibiting fuel injection of the heat engine, launching the heat engine by the electric machine, synchronizing a speed of the heat engine and a speed of the electric machine without fuel injection, activating the fuel injection and turning off the electric machine and decoupling the two main shafts.

An apparatus with an electric motor including a stator and a rotor; a shaft secured to the rotor; a gearing assembly coupled with the shaft; and a housing assembly defining a non-partitioned interior space housing both the electric motor and gearing assembly. The shaft may be unsupported by bearing assemblies and/or free of oil seals and similar sealing engagements between the electric machine and gearing assembly. The motor may be an axial flux motor having a single stator. The gearing assembly may be a planetary reduction gear assembly with a sun gear mounted on the shaft. The apparatus may include only a single electric motor or include a second electric motor and second gearing assembly. The embodiments having a single motor may be used to drive a fan or a vehicle wheel. The embodiments having two motors may be used as a differential drive.

An electric drive system for a motor vehicle includes a first electric machine having a first rotor, a differential having a differential input shaft and a first differential output shaft and a second differential output shaft. The two differential output shafts are arranged coaxially with respect to the first rotor. A first side shaft is coupled to the first differential output shaft for conjoint rotation. A second side shaft is coupled, or is couplable, to the second differential output shaft for conjoint rotation. A second electric machine has a second rotor arranged coaxially with respect to the first rotor. A first switching element is configured to couple the first rotor to the first side shaft for conjoint rotation. A second switching element is configured to couple the second rotor to the second side shaft for conjoint rotation. The first rotor is coupled, or couplable, to the differential input shaft for conjoint rotation.

A motor vehicle electric drive system includes first and second electric machines, arranged coaxial to each other and respectively having first and second rotors, a differential gear having a differential input shaft and a first and second differential output shafts arranged coaxially to the first rotor. A transmission stage has a transmission input shaft and a transmission output shaft. The transmission output shaft is connected in a rotationally fixed manner with the differential input shaft. A first switching element couples the first rotor in a rotationally fixed manner with the first differential output shaft. A second switching element couples the second rotor in a rotationally fixed manner with the second differential output shaft. A third switching element couples the first rotor in a rotationally fixed manner with the differential input shaft. A fourth switching element couples the second rotor in a rotationally fixed manner with the transmission input shaft.

A method controls the startup of a heat engine of a hybrid power train of a vehicle. The power train includes the heat engine and an electric drive machine, two concentric main shafts coupled one to the heat engine and one to the electric machine, at least one step-down gear of each of the main shafts on a secondary shaft connected to wheels of the vehicle, and a coupling of the two main shafts. The method includes coupling the two main shafts, inhibiting fuel injection of the heat engine, launching the heat engine by the electric machine, synchronizing a speed of the heat engine and a speed of the electric machine without fuel injection, activating the fuel injection and turning off the electric machine and decoupling the two main shafts.