Energy management method on a hybrid vehicle comprising a transmission with discrete ratios
First Claim
1. A method for managing driving comfort and energy consumption of a power unit of a hybrid vehicle, the power unit comprising at least one internal combustion engine and an electric drive machine, coupled to wheels of the hybrid vehicle by a transmission with gears with discrete ratios, comprising:
- determining a consumption of the internal combustion engine and an electrical consumption of the electric drive machine;
selecting an energy criterion, said energy criterion being based on a sum of the consumption of the internal combustion engine and the electrical consumption of the electric drive machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin;
selecting a discomfort criterion, said discomfort criterion being based on a comfort level for a driver in said hybrid vehicle;
selecting a mixed criterion based on a sum of the energy criterion and the discomfort criterion;
minimizing said mixed criterion resulting in a minimized mixed criterion; and
limiting changes of said gears of the transmission based on said minimized mixed criterion thereby managing driving comfort and energy consumption of said hybrid vehicle.
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Abstract
A method manages energy of a power unit of a hybrid vehicle. The power unit includes at least one internal combustion engine and an electric drive machine, coupled to wheels of the vehicle by a transmission with discrete ratios. The method includes minimizing, at each operating point of the energy, an energy criterion linked to a sum of consumption of the internal combustion engine and an electrical consumption of the electrical machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin. The minimized criterion is a mixed criterion which is a sum of an energy criterion and a discomfort criterion linked to management of kinematic modes of the transmission.
15 Citations
9 Claims
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1. A method for managing driving comfort and energy consumption of a power unit of a hybrid vehicle, the power unit comprising at least one internal combustion engine and an electric drive machine, coupled to wheels of the hybrid vehicle by a transmission with gears with discrete ratios, comprising:
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determining a consumption of the internal combustion engine and an electrical consumption of the electric drive machine; selecting an energy criterion, said energy criterion being based on a sum of the consumption of the internal combustion engine and the electrical consumption of the electric drive machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin; selecting a discomfort criterion, said discomfort criterion being based on a comfort level for a driver in said hybrid vehicle; selecting a mixed criterion based on a sum of the energy criterion and the discomfort criterion; minimizing said mixed criterion resulting in a minimized mixed criterion; and limiting changes of said gears of the transmission based on said minimized mixed criterion thereby managing driving comfort and energy consumption of said hybrid vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification