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Old 03-19-2010, 08:15 AM   #57 (permalink)
370Zsteve
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Quote:
Originally Posted by Modshack View Post
Actually it's very easy to do on deceleration too where engine braking exceeds tire traction. Since the rear wheels can't spin up due to engine drag they hop when they lose traction. High end performance motorcycles now employ "slipper clutches" that slip just enough to prevent this kind of thing, like an ABS for track deceleration..
and my MV Agusta goes a step further and uses what they call an Engine Braking System. No slipper clutch needed! Rather than me try to explain it , here's the official line:

The Magneti Marelli 5SM ECU manages the widely acknowledged EBS system (Engine Brake System) that is fitted to MV Agusta engines. The concept is based on a solenoid-activated by-pass valve on cylinder N° 2 intake duct. The by-pass is situated downstream from the feed throttle that has a suitably shaped air intake. This device allows cylinder N°2 to produce torque even under deceleration (when the feed throttles are closed) thanks to a signal sent by the Marelli ECU.
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