METHOD AND SYSTEM FOR SHIFTING A GEAR OF A HYBRID ELECTRIC VEHICLE
First Claim
1. A method for shifting a gear of a hybrid electric vehicle, comprising the following acts performed by a gear shifting system of the vehicle:
- determining a state of a battery according to a remaining capacity of the battery, a required torque and a state of the hybrid electric vehicle, wherein the state of the battery comprises a discharging state or a charging state;
determining a plurality of optional target gears and a torque and a rotating speed of an engine corresponding to each optional target gear according to the state of the battery and a speed of the hybrid electric vehicle;
selecting an optional target gear with a minimum fuel consumption of the engine as a target gear from the plurality of optional target gears; and
determining whether to perform a gear shift by comparing with a current gear.
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Abstract
A method and a system for shifting a gear of a hybrid electric vehicle are provided. The method includes following steps. A state of a battery is determined according to a remaining capacity of the battery, a required torque and a state of the hybrid electric vehicle, in which the state of the battery comprises a discharging state or a charging state. A plurality of optional target gears, a torque and a rotating speed of an engine corresponding to each optional target gear are determined according to the state of the battery and a speed of the hybrid electric vehicle. An optional target gear with a minimum fuel consumption of the engine is selected as a target gear from the plurality of optional target gears. It is determined whether to perform a gear shift by comparing with a current gear.
34 Citations
15 Claims
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1. A method for shifting a gear of a hybrid electric vehicle, comprising the following acts performed by a gear shifting system of the vehicle:
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determining a state of a battery according to a remaining capacity of the battery, a required torque and a state of the hybrid electric vehicle, wherein the state of the battery comprises a discharging state or a charging state; determining a plurality of optional target gears and a torque and a rotating speed of an engine corresponding to each optional target gear according to the state of the battery and a speed of the hybrid electric vehicle; selecting an optional target gear with a minimum fuel consumption of the engine as a target gear from the plurality of optional target gears; and determining whether to perform a gear shift by comparing with a current gear. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for shifting a gear of a hybrid electric vehicle, comprising:
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a state determining module configured to determine a state of a battery according to a remaining capacity of the battery, a required power and a state of the hybrid electric vehicle, wherein the state of the battery comprises a discharging state or a charging state; an optional target gear determining module configured to determine a plurality of optional target gears and to determine a torque and a rotating speed of an engine corresponding to each optional target gear according to the state of the battery and a speed of the hybrid electric vehicle; a target gear determining module configured to select an optional target gear with a minimum fuel consumption of the engine as a target gear from the plurality of optional target gears; and a gear shifting module configured to determine whether to perform a gear shifting by comparing with a current gear. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification