RE: ppt on camless engine free download
CAMLESS.ppt (Size: 462 KB / Downloads: 37)
The cam controls the “breathing channels” of the IC engines , that is, the valves through which the fuel air mixture (in SI engines) or air(in CI engines) is supplied and exhaust driven out. Besieged by demands for better fuel economy, more power, and less pollution, motor engineers around the world are pursuing a radical “camless” design by which it can give us more fuel efficiency.
Control the breathing channels (valves) of an IC engine
Connected to camshaft which is operated by crankshaft
Cams push open valves at proper time & guide their closure
But they are inflexible except VTEC & VVT-I
Engineers could not vary timing, lift & duration of valve opening infinitely
Eliminated mechanical linkages
Could provide infinite variation of valve parameters
It can make engines clean, efficient & responsive
It is a electro-hydraulic camless valve train (ECV)
Uses elastic property of compressed hydraulic fluid which acts like a liquid spring, accelerates & decelerates the valves
Even though some disadvantages are present, we can expect electrohydraulic & electromechanical valves to replace the conventional camshaft technology.