Self-propelling work machine and method for braking such a work machine
First Claim
1. A self-propelling work machine, comprising:
- an internal combustion engine;
an electric drive having at least one electric motor, a generator drivable by the internal combustion engine and supplying the electric drive with electrical energy, and at least one auxiliary unit coupled to the internal combustion engine;
a braking apparatus configured to provide a regenerative braking by the electric drive;
a feedback apparatus for feeding back electrical motor braking power from the electric motor to the internal combustion engine via the generator; and
a controller with computer readable instructions stored on non-transitory memory for adjusting an electrical load of the at least one auxiliary unit of the internal combustion engine based on the electrical motor braking power fed back to the internal combustion engine via the generator.
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Accused Products
Abstract
Methods and systems are provided related to a self-propelling work machine in the form of a tracked vehicle having an electric drive, with a generator drivable by an internal combustion engine, an auxiliary unit connected to the engine, and a braking apparatus for braking the work machine. The braking apparatus provides regenerative braking by the electric drive and comprises a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the engine and on the auxiliary unit. A controller automatically increases or decreases the electrical load of the auxiliary unit based on the electrical motor braking power fed back to the engine and/or based on an engine speed.
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Citations
13 Claims
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1. A self-propelling work machine, comprising:
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an internal combustion engine; an electric drive having at least one electric motor, a generator drivable by the internal combustion engine and supplying the electric drive with electrical energy, and at least one auxiliary unit coupled to the internal combustion engine; a braking apparatus configured to provide a regenerative braking by the electric drive; a feedback apparatus for feeding back electrical motor braking power from the electric motor to the internal combustion engine via the generator; and a controller with computer readable instructions stored on non-transitory memory for adjusting an electrical load of the at least one auxiliary unit of the internal combustion engine based on the electrical motor braking power fed back to the internal combustion engine via the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for braking a work machine, comprising:
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operating an electric motor during regenerative braking to generate electrical motor braking power; feeding the generated electrical motor braking power to a generator coupled to an engine via a feedback apparatus; applying a mechanical drive power generated at the generator via the electrical motor braking power on the engine via the generator; and varying an electrical load of an auxiliary unit coupled to the generator based on one of the electrical motor braking power fed back to the engine via the generator, and an operating state of the engine while the electrical motor braking power is fed to the engine via the generator. - View Dependent Claims (13)
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Specification