ENERGY SYSTEM FOR A HYBRID VEHICLE
First Claim
1. A method of controlling operation of an energy system for a hybrid vehicle, the energy system comprising:
- a combustion engine being controlled to work at a desired engine rotational speed;
an electric generator/motor arranged to be driven by the combustion engine to output a generated electric power;
a power consuming device arranged to be driven by the combustion engine and drivable by said electric generator/motor; and
an energy storage device connected to said electric generator/motor and arranged to receive the generated electric power output by the electric generator/motor,wherein the method comprises the steps of;
controlling said electric generator/motor to output generated electric power to said energy storage device;
monitoring an actual engine rotational speed; and
if the actual engine rotational speed decreases from said desired engine rotational speed, controlling said electric generator/motor to gradually reduce said generated electric power output to said energy storage device.
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Accused Products
Abstract
A method of controlling operation of an energy system for a hybrid vehicle, the energy system including a combustion engine controlled to work at a desired engine rotational speed; an electric generator/motor driven by the combustion engine to output a generated electric power; a power consuming device driven by the combustion engine and drivable by the electric generator/motor; and an energy storage device connected to the electric generator/motor and arranged to receive the generated electric power output by the electric generator/motor. The method includes the steps of: monitoring an actual engine rotational speed; and if the actual engine rotational speed decreases from the desired engine rotational speed, controlling the electric generator/motor to output a gradually reducing generated electric power. Hereby, the combustion engine can be allowed to remain in an operating range where it works efficiently, while at the same time fulfilling the need for power of the power consuming device.
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Citations
15 Claims
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1. A method of controlling operation of an energy system for a hybrid vehicle, the energy system comprising:
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a combustion engine being controlled to work at a desired engine rotational speed; an electric generator/motor arranged to be driven by the combustion engine to output a generated electric power; a power consuming device arranged to be driven by the combustion engine and drivable by said electric generator/motor; and an energy storage device connected to said electric generator/motor and arranged to receive the generated electric power output by the electric generator/motor, wherein the method comprises the steps of; controlling said electric generator/motor to output generated electric power to said energy storage device; monitoring an actual engine rotational speed; and if the actual engine rotational speed decreases from said desired engine rotational speed, controlling said electric generator/motor to gradually reduce said generated electric power output to said energy storage device. - View Dependent Claims (2, 3)
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4. A controller for controlling operation of an energy system of a hybrid vehicle, the energy system comprising:
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a combustion engine controllable to work at a desired engine rotational speed; an electric generator/motor arranged to be driven by the combustion engine to output a generated electric power; a power consuming device arranged to be driven by the combustion engine and drivable by said electric generator/motor; and an energy storage device connected to said electric generator/motor and arranged to receive the generated electric power output by the electric generator/motor, the controller being configured to; control said electric generator/motor to output generated electric power to said energy storage device; monitor an actual engine rotational speed; and if the actual engine rotational speed decreases from said desired engine rotational speed, control said electric generator/motor to gradually reduce said generated electric power output to said energy storage device. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. (canceled)
Specification