Invention Grant
US08152683B2 Eight to thirteen speed automatic transmission 有权
八到十三速自动变速器

Eight to thirteen speed automatic transmission
Abstract:
An eight, nine, eleven or thirteen speed automatic transmission has an input and output, four planetary gear assemblies, four connecting members for coupling certain elements of the planetary gear assemblies to other elements, four brakes for selectively connecting certain elements of the planetary gear assemblies to ground and three friction clutches for selectively connecting certain elements of the planetary gear assemblies to other elements. Sequenced operation of the brakes and clutches provides, eight, nine, eleven or thirteen forward speeds or gear ratios and reverse.
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