A tractor includes an internal combustion engine for delivering torque, wheels or tracks for imparting a propulsive force to the ground, and a power takeoff shaft for delivering torque to implements attached thereto. The power takeoff shaft is driven by a mechanical drive connection to the engine. A
A tractor includes an internal combustion engine for delivering torque, wheels or tracks for imparting a propulsive force to the ground, and a power takeoff shaft for delivering torque to implements attached thereto. The power takeoff shaft is driven by a mechanical drive connection to the engine. An electrical motor/generator is drivingly connected to the engine, and at least one electrical motor is arranged to deliver a propulsion force to the wheels or tracks. The motor is electrically connected to, and powered by, the electrical motor/generator. A battery is connected to the electrical motor/generator and to the electrical motor so that electrical energy can be passed therebetween. The motor/generator can also operate as a motor so that the power takeoff shaft is at least partially powered by electrical energy from the battery.
대표청구항▼
1. An agricultural tractor for use with an implement selectively attached to the tractor, the tractor comprising a tractor frame providing a supporting chassis, an internal combustion engine for delivering torque, wheels or tracks for imparting a propulsive force to the ground, and a power takeoff s
1. An agricultural tractor for use with an implement selectively attached to the tractor, the tractor comprising a tractor frame providing a supporting chassis, an internal combustion engine for delivering torque, wheels or tracks for imparting a propulsive force to the ground, and a power takeoff shaft which terminates in a stub external to the supporting chassis for delivering torque to an implement selectively attached thereto, a mechanical drive connection between the engine and the power takeoff shaft, an electrical generator drivingly connected to the engine, and at least one electrical motor arranged to deliver a propulsion force to the wheels or tracks, the at least one electrical motor being electrically connected to, and powered by, the electrical generator, wherein the mechanical drive connection between the engine and the power takeoff shaft includes a power takeoff clutch to allow disengagement of the power takeoff shaft from torque delivered by the electrical motor, further comprising a power takeoff drive electrical motor being electrically connected to, and powered by, the electrical generator, the power takeoff drive electrical motor being drivingly connected to the power takeoff shaft on an output side of the power takeoff clutch so that the power takeoff shaft can be driven by the power takeoff drive electrical motor independently of the engine when the power takeoff clutch is disengaged, characterised in that the tractor further comprises a battery connected to the electrical generator and to the electrical motor, wherein said electrical generator is provided as a first motor/generator drivingly connected to the engine, and to which the battery is connected so that electrical energy can be passed therebetween, wherein the first motor/generator can operate as a motor so that the power takeoff shaft is at least partially powered by electrical energy from the battery. 2. A tractor according to claim 1, wherein the first motor/generator is driven directly from said mechanical drive connection between the engine and the power takeoff shaft. 3. A tractor according to claim 1, wherein said electrical motor is provided as a second motor/generator which provides said electrical motor arranged to deliver a driving force to the wheels or tracks; and to which the battery is connected so that electrical energy can be passed therebetween, wherein the second motor/generator can operate as a generator which converts torque recovered from the wheels or tracks into electrical energy which can be delivered to, and stored in, the battery. 4. A tractor according to claim 1, comprising a front pair of wheels or tracks and a rear pair of wheels or tracks, wherein each wheel or track has associated therewith a respective electric motor arranged to deliver a propulsion force to the wheel or track via a respective mechanical drive connection, each electrical motor being electrically connected to, and powered by, the electrical generator. 5. An agricultural tractor for use with an implement selectively attached to the tractor, the tractor comprising: a tractor frame providing a supporting chassis;an internal combustion engine for delivering torque;ground engaging members for imparting a propulsive force to move the tractor over ground, wherein the ground engaging members are at least one of wheels or tracks; anda power takeoff shaft which terminates in a stub external to the supporting chassis for delivering torque to implements attached thereto;a mechanical drive connection between the engine and the power takeoff shaft;a first motor/generator which provides an electrical generator drivingly connected to the engine;at least one electrical motor arranged to deliver a propulsion force to the ground engaging members, the at least one electrical motor being electrically connected to, and powered by, the first motor/generator;a battery connected to the first motor/generator and to the at least one electrical motor, the battery connected to the first motor/generator so that electrical energy can be passed therebetween, wherein the first motor/generator can operate as a motor so that the power takeoff shaft is at bast partially powered by electrical energy from the battery; andan auxiliary electrical motor drivingly connected, via an auxiliary clutch, to the mechanical drive connection between the engine and the power takeoff shaft, the auxiliary electrical motor positioned in-line of the mechanical drive connection between the engine and the power takeoff shaft and downstream of the auxiliary clutch, wherein when the auxiliary clutch is open the power takeoff shaft is driven by the auxiliary electrical motor which is electrically connected to, and powered by, the first motor/generator, wherein the auxiliary electrical motor is a motor/generator which can serve as an electrical generator driven by the mechanical drive connection when the auxiliary clutch is closed.
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이 특허에 인용된 특허 (22)
Hofbauer Peter (Wolfsburg DEX) Ehlers Karsten (Wolfsburg DEX) Heidemeyer Paulus (Wolfsburg DEX), Apparatus for operating a motor vehicle.
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