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US 7,252,617 B2Granted
Six-speed powertrain of an automatic transmission
AssigneeHyundai Motor Company
InventorsHyu Tae Shim, Ki Been Lim, Gyung Cheol Lee, Byeong Ho Soh, Gang Soo Seo
Life of this patent
Estimating the term…
Abstract
A variable compound planetary gearset forms five operational elements by having its single and double pinion planetary gearsets be interconnected by a shared planet carrier. The variable compound planetary gearset forms six forward speeds and one reverse speeds by receiving input torque through two input routes fixedly or variably connected to a simple planetary gearset and one input route variably connected to an input shaft.
Claims19
A six-speed powertrain of an automatic transmission, comprising:
- a variable compound planetary gearset including a double pinion planetary gearset and a single pinion planetary gearset interconnected by a shared planet carrier so as to form first, second, third, fourth, and fifth operational elements;
- and
- a simple planetary gearset having sixth, seventh, and eighth operational element including an operational element fixedly and variably connected to two operational element of the variable compound planetary gearset, an input element fixedly connected to an input shaft, and a fixed element fixedly connected to a transmission case.
A six-speed powertrain of an automatic transmission, comprising:
- a variable compound planetary gearset including a single pinion planetary gearset and a double pinion planetary gearset interconnected by a shared planet carrier so as to form five operational elements, wherein the shared planet carrier is variably connected to a transmission case via at least one of a second brake and a one-way clutch and also variably connected to an input shaft via a second clutch, ring gears thereof are variably interconnected via a first clutch, one of the ring gears always acts as an output element, and a sun gear of the single pinion planetary gearset is variably connected to the transmission case;
- and
- a simple planetary gearset forming three operational elements including a planet carrier fixedly connected to one sun gear of the variable compound planetary gearset and variably connected to another sun gear thereof.
Dependencies are inferred from the claim text.