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US 8,801,563 B2Granted
9-speed planetary-gear automatic transmission
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsUlrich Ohnemus, Tilo Marschall, Alexander Martin, Lothar Wolf, Andreas Senft
Life of this patent
Estimating the term…
Abstract
A 9-speed planetary gear-automatic transmission includes precisely one gearbox input element, precisely one gearbox output element, precisely four planetary gear sets and precisely six shifting devices for selecting the individual gears of the planetary gear-automatic transmission.
Claims22
A planetary gear-automatic transmission, comprising:
- a planetary gear-automatic transmission having nine forward speed gears, the planetary gear-automatic transmission, comprising:
- precisely one transmission input element;
- precisely one transmission output element;
- precisely four planetary gear sets;
- and
- precisely six shifting elements, each shifting element being provided for shifting individual speed gears of the nine forward speed gears of the planetary gear-automatic transmission, wherein
- when a first clutch is in a closed state, a first planetary wheel carrier and a second planetary wheel carrier are coupled in rotation with each other, and
- a first planetary gear set comprises a first hollow wheel, which is securely connected to a housing of the planetary gear-automatic transmission;
- a first sun wheel, which is arranged in a rotatable manner;
- and first planetary wheels, which mesh with the first hollow wheel and the first sun wheel;
- the first planetary wheels being mounted in a rotatable manner on the first planetary wheel carrier.
8 more elements
A planetary gear-automatic transmission, comprising:
- a planetary gear-automatic transmission having nine forward speed gears, the planetary gear-automatic transmission, comprising:
- precisely one transmission input element;
- precisely one transmission output element;
- precisely four planetary gear sets;
- and
- precisely six shifting elements, each shifting element being provided for shifting individual speed gears of the nine forward speed gears of the planetary gear-automatic transmission, wherein
- a first planetary gear set comprises a first hollow wheel, which is securely connected to a housing of the planetary gear-automatic transmission, a first sun wheel, which is arranged in a rotatable manner, and first planetary wheels, which mesh with the first hollow wheel and the first sun wheel, the first planetary wheels being mounted in a rotatable manner on a first planetary wheel carrier;
- one shifting element is a first brake, and further wherein when the first brake is in a closed state, the first sun wheel is securely fixed in relation to the housing;
- a second planetary gear set comprises a second hollow wheel, which is arranged in a rotatable manner, a second sun wheel, which is arranged in a rotatable manner, and second planetary wheels, which mesh with the second hollow wheel and the second sun wheel, the second planetary wheels being mounted in a rotatable manner on a second planetary wheel carrier;
- the first and the second sun wheel are permanently coupled in rotation with each other;
- and
- one shifting element is a first clutch, and further wherein when the first clutch is in a closed state, the first planetary wheel carrier and the second planetary wheel carrier are coupled in rotation with each other.
9 more elements
Dependencies are inferred from the claim text.