Transmission

A transmission comprising:

• a housing having a pressure chamber and an oil sump filled with a lubricant;
• first and second output shafts rotatably supported by said housing;
• a clutch assembly disposed between said first and second output shafts;
• a pump-less lubrication arrangement for conveying the lubricant from the sump to the pressure chamber, the pump-less lubrication arrangement including a pair of meshed torque transmitting components rotatively driven by at least one of said first and second output shafts, said pair of meshed torque transmitting components being operable to generate and convey pressurized lubricant from said sump to said pressure chamber in response to rotation thereof;
• and
• a lubrication oil shield at least partially surrounding at least one of said pair of torque transmitting components and having an opening providing fluid communication between said oil sump and said pressure chamber.

A torque transmission assembly, comprising:

• a housing having a pressure chamber and an oil sump filled with lubrication oil;
• first and second shafts rotatably supported by said housing;
• a clutch for selectively transmitting torque from said first shaft to said second shaft, said clutch including a first clutch member rotationally fixedly connected to said first shaft and a second clutch member;
• a torque transfer mechanism coupling said second clutch member to said second shaft and including a first rotary torque transmission component fixed to said second clutch member and having first teeth in meshed engagement with second teeth of a second rotary torque transmission component, and a third rotary torque transmission component fixed to said second shaft and having third teeth in meshed engagement with said second teeth of said second torque transmission component, and wherein said pressure chamber is located in said housing to be positioned adjacent to the location of meshed engagement between said second and third torque transmission components;
• and
• a pump-less lubrication arrangement for conveying said lubrication oil from said oil sump to said pressure chamber and including a lubrication oil shield surrounding a portion of said second torque transmission component and having an opening in fluid communication with said oil sump, wherein the meshed engagement between said second teeth of said second torque transmission component and said third teeth of said third torque transmission component causes said lubrication oil to be drawn through said opening and convey pressurized lubrication oil to said pressure chamber in response to rotation of said second and third torque transmission components.

A transmission, comprising

• a housing;
• first and second shafts rotatably supported by said housing;
• a clutch having a first clutch component fixed for rotation with said first shaft, a second clutch component, and an actuator for releasably coupling said second clutch component to said first clutch component;
• a transfer assembly including a first gear rotatably supported on said first shaft and fixed for rotation with said second clutch component, a second gear fixed for rotation with said second shaft, and an intermediate idler gear in meshed engagement with said first and second gears;
• and
• a pump-less lubrication arrangement for conveying lubricant from a sump in said housing to said clutch, said lubrication arrangement including a pressure chamber formed in said housing adjacent to the location of meshed engagement between said idler gear and said second gear, a pipe having a first end in fluid communication with said pressure chamber and a second end, and a distributor element fixed to said housing in proximity to said clutch and in fluid communication with said second end of said pipe;
• wherein pressurized lubricant is generated by meshed engagement of said idler gear and said second gear in response to rotation therebetween, said pressurized lubricant is conveyed from said pressure chamber to said distributor element via said pipe and is distributed through holes in said distributor element to lubricate components of said clutch.

A transmission comprising:

• a housing having a pressure chamber and an oil sump filled with a lubricant;
• first and second output shafts rotatably supported by said housing;
• a clutch assembly disposed between said first and second output shafts;
• a distributor element fixed to said housing in proximity to said clutch assembly and having a plurality of lubricant discharge openings;
• a first gear fixed for rotation with said first output shaft;
• a second gear fixed for rotation with said second output shaft;
• a torque transmitting component operable to generate and convey pressurized lubricant to said pressure chamber in response to rotation thereof;
• a lubrication oil shield at least partially surrounding said torque transmitting component and having an opening providing fluid communication between said oil sump and said pressure chamber;
• and
• a lubrication pipe for conveying pressurized lubricant from said pressure chamber to said distributor element such that lubricant is conveyed through said lubricant discharge openings in said distributor element to lubricate components of said clutch assembly;
• wherein said torque transmitting component includes an idler gear meshed with said first gear and said second gear, wherein the meshed engagement between said second gear and said idler gear causes lubricant in said oil sump to be drawn through said opening in said oil shield and pressurized prior to delivery to said pressure chamber.