Vehicular internal combustion engine with subsidiary transmission

A combined crankcase, transmission assembly for a vehicle comprising a casing having a partition extending generally longitudinally relative to the associated vehicle, a first cover affixed to said partition at one side thereof and defining with said partition a first cavity, a first change speed transmission contained within said first cavity, said first change speed transmission having an input shaft driven by an engine output shaft journaled at least in part by said casing and an output shaft driven by said input shaft, a second cover affixed to said partition on the other side thereof and defining with said partition a second cavity, a second change speed transmission in said second cavity, said change speed transmission comprising an input shaft and an output shaft driven by said input shaft, and means extending through said partition for driving said second change speed transmission input shaft from said first change speed transmission output shaft, said means for driving the output shaft from the input shaft of said first change speed transmission comprises a plurality of meshing gear pairs and dog clutching means for selectively coupling the gears to the respective shafts, said gear pairs all providing a plurality of forward drive ratios, said second change speed transmission providing a reverse drive as well as a forward drive.

A combined crankcase, transmission assembly for a vehicle comprising a casing having a partition extending generally longitudinally relative to the associated vehicle, a first cover affixed to said partition at one side thereof and defining with said partition a first cavity, a first change speed transmission contained within said first cavity, said first change speed transmission having an input shaft driven by an engine output shaft journaled at least in part by said casing and an output shaft driven by said input shaft, a second cover affixed to said partition on the other side thereof and defining with said partition a second cavity, a second change speed transmission in said second cavity, said change speed transmission comprising an input shaft and an output shaft driven by said input shaft, and means extending through said partition for driving said second change speed transmission input shaft from said first change speed transmission output shaft, said shafts all rotating about axes that are transversely disposed relative to the partition.

A combined crankcase, transmission assembly for a vehicle comprising a casing having a partition extending generally longitudinally relative to the associated vehicle, a first cover affixed to said partition at one side thereof and defining with said partition a first cavity, a first change speed transmission contained within said first cavity, said first change speed transmission having an input shaft driven by an engine output shaft journaled at least in part by said casing and an output shaft driven by said input shaft, a second cover affixed to said partition on the other side thereof and defining with said partition a second cavity, a second change speed transmission in said second cavity, said change speed transmission comprising an input shaft and an output shaft driven by said input shaft, means extending through said partition for driving said second change speed transmission input shaft from said first change speed transmission output shaft, a lubricating passage extending through the input shaft of said second change speed transmission, means for delivering lubricant to said input shaft lubricant passage, a lubricant passage extending through the output shaft of said second change speed transmission, and conduit means for delivering lubricant from the lubricant passage of the input shaft to the lubricant passage of the output shaft.

A lubricating system for an auxiliary transmission having an input shaft driven by a main transmission, a secondary shaft driven by said input shaft, final drive means for driving an output shaft for powering a vehicle or the like, means for driving said final drive from said secondary shaft, said input shaft and said secondary shaft each having a respective lubricant passage extending at least partially therethrough, means for delivering lubricant to said input shaft lubricant passage from externally of said auxiliary transmission, conduit means for delivering lubricant from the lubricant passage of said input shaft to the lubricant passage of said secondary shaft, and means for delivering lubricant from said secondary shaft lubricant passage to said final drive.

A drain system for an auxiliary transmission driven by a main transmission and separated therefrom by a common wall comprising drain means for returning lubricant from the auxiliary transmission to the main transmission, said means for returning being effective to provide a higher lubricant level in said auxiliary transmission when the auxiliary transmission is being driven than when the auxiliary transmission is not being driven.