|
Driveline power loss
Driveline loss is the power lost to friction (mostly). Spinning weight takes hp so turning the flywheel is a power loss. Driving the alternator, the power steering pump, the water pump, etc. costs engine hp. The transmission gears turn creating friction and power loss. The Ujoints also use hp when changing the angle of the power direction. The trans pushes the gear oil at high speed causing another power loss while lowering the friction loss of the gears and bearings rolling and rubbing. The rear axle changes direction with a Helical cut gear and that costs hp. Then there's the little things like overcoming the drag of the disc brake pads and the rolling resistance of the tires.
Anyway, there's a lot of hp lost to all the different systems. Too many too list, but they're mostly small losses. When all the different losses are added up the driveline loss is usually a percentage of engine power. Vipers usually have a low loss of about 18%. Most two wheel drive systems lose about 23-25%. My Stealth is an All Wheel Drive and rates about 30% driveline lost. Hope this explains what you wanted to know.
Ted
|