Transmission and transfer case having integrated lubrication systems
AssigneeFord Global Technologies, LLC
InventorsTimothy Allen, Steven Thomas
Life of this patent
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Abstract
In a driveline for a motor vehicle that includes an automatic transmission having an output shaft that drives a transfer case, an oil sump located in the transfer case, a pump supplied with fluid from the first sump, delivers fluid to a lubrication circuit in the transmission, a second sump supplies fluid to the inlet of a second pump, whose output supplies a second lubrication circuit located in the transfer case. Both of the hydraulic pumps are continually driveably connected to a set of the vehicle's drive wheels.
Claims17
A system for lubricating components of a drive line adapted to drive the wheels of a motor vehicle, the system comprising:
- a power transmission including a first output;
- a first lubrication circuit;
- a second lubrication circuit;
- a first sump for containing hydraulic fluid;
- a transfer case adapted for a drive connection to the first output, including a second sump for containing hydraulic fluid, and a second output adapted for a drive connection to at least one driven wheel;
- a first pump driveably connected to the second output, hydraulically connected to the first sump and the first lubrication circuit;
- and
- a second pump driveably connected to the second output, hydraulically connected to the second sump and the second lubrication circuit.
A system for lubricating components of a drive line adapted to drive the wheels of a motor vehicle, the system comprising:
- an input;
- a first output driveably connected to the input;
- a first sump for containing a source of hydraulic fluid;
- a first lubrication circuit;
- a lube pump driveably connected to the first output and hydraulically connected to the first lubrication circuit;
- and
- a scavenge pump driveably connected to said first output and hydraulically connected to the first sump.
A method for supplying lubrication to a transmission and transfer case, the transmission and transfer case each having a sump for containing hydraulic fluid, the transfer case having an output adapted for a drive connection to at least a first set of driven wheels, the method comprising the steps of:
- driveably connecting a first pump and a second pump to the output;
- defining a first circuit for carrying lubrication fluid in the transfer case;
- defining a second circuit for carrying lubrication fluid in the transmission;
- hydraulically connecting the first pump to the transmission sump and to the first circuit;
- and
- hydraulically connecting the second pump to the transfer case sump and to the second circuit.
Dependencies are inferred from the claim text.