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US 4,228,693 AGranted
Transmission shift control apparatus
AssigneeBorg-Warner Corporation
InventorDonald W. Kelbel
Life of this patent
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AssigneeBorg-Warner Corporation
InventorDonald W. Kelbel
Estimating the term…
Shift control apparatus for a multiple speed sliding gear manual transmission is characterized by the provision of a main shift rail which is rotatable for crossover selection and axially slidable for engagement of the selected gear. An auxiliary shift rail is axially slidable for engagement of an auxiliary gear and a reverse idler gear is axially slidable for engagement of reverse. Linkage is provided for sliding the auxiliary shift rail in one direction upon axial sliding movement of the main shift rail in a first direction and for sliding the reverse idler gear in the same one direction upon axial sliding movement of the main shift rail in a second direction. The linkage prevents inadvertent sliding movement of the reverse idler gear. There is also provided an inhibiting device for preventing engagement of reverse inadvertently.
In a multiple speed ratio power transmission having gear ratios selectively engageable for defining torque delivery paths between an input member and an output member, and shift control means for selectively engaging gear ratios;
In combination, a housing, a member in said housing pivotal about an axis between first, second, third and fourth positions, said member being axially slidable, inhibiting means including first resilient means resisting pivoting of said member from said second position to said third position with a relatively light force, second resilient means resisting pivoting of said member from said third position to said fourth position with a relatively heavy force, and means secured to said housing for blocking sliding of said member in one axial direction when said member is in said third position.
A transmission comprising an input shaft, an output shaft, an input gear connected to said input shaft, first, second and third output gears rotatably supported on said output shaft, a fourth output gear connected to said output shaft, a countershaft, drive, first, second, third and reverse countershaft gears connected to said countershaft with said drive gear engaging said input gear and said first, second and third countershaft gears respectively engaging said first, second and third output gears, a fourth countershaft gear rotatably supported on said countershaft and engaging said fourth output gear, a first synchronizing clutch supported by said output shaft and including a first collar shiftable in first and second directions respectively for connecting said first and second output gears to said output shaft, a reverse output gear connected to said first collar, a second synchronizing clutch supported by said output shaft and including a second collar shiftable in said first and second directions respectively for connecting said third output gear and said input gear to said output shaft, a third synchronizing clutch supported by said countershaft and including a third collar shiftable in said second direction for connecting said fourth countershaft gear to said countershaft, a reverse idler shaft, a reverse idler gear rotatably supported on said reverse idler shaft and shiftable in said second direction for engagement with said reverse countershaft gear and said reverse output gear, and means for selectively shifting said first, second and third synchronizing clutches and said reverse idler gear, said shifting means including first shift means engaged with said first synchronizing clutch, second shift means engaged with said second synchronizing clutch, third shift means engaged with said third synchronizing clutch and said reverse idler gear, a main shift rail rotatable to first, second, third and fourth crossover positions, said main shift rail being slidable in said first direction when in said first, second and third crossover positions and being slidable in said second direction when in said first, second and fourth crossover positions, means blocking sliding of said main shift rail in said second direction when in said third crossover position, selector means connected to said main shift rail and rotatable therewith for engagement with said first and second shift means respectively when in said first and second crossover positions and for engagement with said third means when in both of said third and fourth crossover positions, said shifting means being constructed and arranged such that sliding of said main shift rail in said first direction when in said first, second and third crossover positions respectively shifts said first and second synchronizing clutches in said first direction and said third synchronizing clutch in said second direction, and sliding of said main shift rail in said second direction when in said first, second and fourth crossover positions respectively shifts said first and second synchronizing clutches and said reverse idler gear in said second direction.
Dependencies are inferred from the claim text.