Patent ID: 8696513
Filing Date: 2014-04-15
Classification: F16H

Abstract:
1. An automotive transmission, said transmission comprising: i. a housing; ii. supported within said housing, an input shaft and an output shaft, said input shaft driven by a power source; iii. slidably mounted on said input shaft, a front drive dog ring; iv. slidably mounted on said output shaft, a rear drive dog ring; v. a first gear housing, and contained in said first gear housing, a planetary gear housing and carrier, a planetary gear set comprising a central sun gear rotatably mounted on said input shaft, and at least three planet gears surrounding the sun gear, said planetary gear housing and carrier being covered by a circumferential first ring gear having internal surface gears that mesh with the planet gears; vi. said planetary gear set being activated by a first hydraulically driven control cylinder that applies a first band on a low gear drum that incorporates the planetary ring gear providing low gear; vii. said planetary gear set being activated by a second hydraulically driven control valve and cylinder that applies a second band on a reverse gear drum that incorporates the planetary carrier providing reverse gear; viii. said front dog ring engages the planetary sun gear to drive said planetary gear set when reverse or low is selected; said front dog ring is driven by said input shaft; said front ring dog disengages when direct drive is selected bypassing said planetary gear set; ix. said rear dog ring is surmounted on said output shaft and further drives said output shaft; said rear dog ring is activated by a shift lever selecting low gear position, reverse gear position, neutral position and direct drive position; when said direct drive position is selected said rear dog ring is disengaged from said planetary gear set; x. a valve rod having a near end; xi. a shift rod, said shift rod comprised of an inner shaft having a middle portion and an outer shell, said shift rod having a distal end and a near end, said valve rod and shift rod being fixedly attached to each other at the respective near ends; xii. said valve rod having predetermined nodules along an outside surface thereof; xiii. said shift rod outer shell rod being spring biased at the near end; xiv. said shift rod outer shell having a first shift fork assembly mounted at the distal end, the shift fork of said first shift fork assembly being engaged to the front dog ring; xv. said shift rod inner shaft having mounted near the middle portion, a second shift fork assembly, the shift fork of said second shift fork assembly being engaged to the rear dog ring; said second shift fork being slidably mounted on said outer shift rod; xvi. a first poppet valve activated by the positioning of the valve rod nodules for controlling the flow of hydraulic fluid to the circumferential first band cylinder, and a second poppet valve for controlling the flow of hydraulic fluid to the circumferential second band.