Hybrid transmission and mode-shift control for hybrid vehicle
First Claim
1. A hybrid transmission for a hybrid vehicle with a plurality of motors, the motors including at least a prime mover and two motor/generators, the hybrid transmission comprising:
- a differential mechanism including a plurality of rotating members, the number of which is one more than the number of the motors, each rotating member connected to a respective one of the motors and a drive train, for a determination of a lever state in which driving power is shared among the motors;
sensors for detecting an operating state of the hybrid vehicle;
a power regulator for regulating output powers of the motors; and
a hybrid controller connected electrically to the sensors and the power regulator, and programmed to perform the following;
operating the hybrid vehicle at least in a first driving mode in which the driving power is implemented by all of the prime mover and the two motor/generators, and in a second driving mode in which the driving power is implemented only by the two motor/generators;
determining a current driving mode as one of the first and second driving modes and a target driving mode as the other of the first and second driving modes based on the operating state of the hybrid vehicle;
determining a current lever state and a target lever state based on the operating state of the hybrid vehicle;
determining, when there is a difference between the current lever state and the target lever state, a mode-shift transition process from the current lever state in the current driving mode to the target lever state in the target driving mode, in which the lever state varies continuously and smoothly; and
executing the transition process with the power regulator.
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Accused Products
Abstract
A hybrid transmission for a hybrid vehicle mounting thereon an engine and a pair of electric motor/generators operates in a plurality of driving modes including EV mode in which the vehicle is powered by only the pair of motor/generators and EIVT mode in which the vehicle is powered by both the pair of motor/generators and the engine. The driving mode is shifted continuously and smoothly through a mode-shift transition process, in which the operating state is regulated to decrease the relative torque and/or the relative rotational speed between the contact elements of an engine clutch before engaging or disengaging the engine clutch.
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Citations
10 Claims
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1. A hybrid transmission for a hybrid vehicle with a plurality of motors, the motors including at least a prime mover and two motor/generators, the hybrid transmission comprising:
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a differential mechanism including a plurality of rotating members, the number of which is one more than the number of the motors, each rotating member connected to a respective one of the motors and a drive train, for a determination of a lever state in which driving power is shared among the motors; sensors for detecting an operating state of the hybrid vehicle; a power regulator for regulating output powers of the motors; and a hybrid controller connected electrically to the sensors and the power regulator, and programmed to perform the following; operating the hybrid vehicle at least in a first driving mode in which the driving power is implemented by all of the prime mover and the two motor/generators, and in a second driving mode in which the driving power is implemented only by the two motor/generators; determining a current driving mode as one of the first and second driving modes and a target driving mode as the other of the first and second driving modes based on the operating state of the hybrid vehicle; determining a current lever state and a target lever state based on the operating state of the hybrid vehicle; determining, when there is a difference between the current lever state and the target lever state, a mode-shift transition process from the current lever state in the current driving mode to the target lever state in the target driving mode, in which the lever state varies continuously and smoothly; and executing the transition process with the power regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hybrid transmission for a hybrid vehicle with a plurality of motors, the motors including at least a prime mover and two motor/generators, the hybrid transmission comprising:
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means for including a plurality of rotating members, the number of which is one more than the number of the motors, each rotating member connected to a respective one of the motors and a drive train, for a determination of a lever state in which driving power is shared among the motors; sensing means for detecting an operating state of the hybrid vehicle; power regulating means for regulating output powers of the motors; and control means for performing the following; operating the hybrid vehicle at least in a first driving mode in which the driving power is implemented by all of the prime mover and the two motor/generators, and in a second driving mode in which the driving power is implemented only by the two motor/generators; determining a current driving mode as one of the first and second driving modes and a target driving mode as the other of the first and second driving modes based on the operating state of the hybrid vehicle; determining a current lever state and a target lever state based on the operating state of the hybrid vehicle; determining, when there is a difference between the current lever state and the target lever state, a mode-shift transition process from the current lever state in the current driving mode to the target lever state in the target driving mode, in which the lever state varies continuously and smoothly; and executing the transition process with the power regulating means.
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Specification