Mechanical Seminar on Cylinder Deactivation

This is Mechanical seminar topic on "Cylinder Deactivation" is a good seminar topic for Mechanical students is the method of deactivating cylinders as per the power requirement of the Engine in order to achieve better Fuel efficiency as well as Emission Control. Cylinder deactivation works because only a small fraction of an engine’s peak horsepower is needed to maintain cruising speed. You can also Subscribe to FINAL YEAR PROJECT'S by Email for more such Projects and Seminar.

Passenger cars require 25 or so horsepower to cruise at 60 mph while 35 horsepower is enough to drive a large SUV at that speed. Using a reduced number of hard working cylinders to produce the necessary power is more efficient than employing the full complement of lightly loaded cylinders. The energy savings come from reduced pumping losses. In all gasoline engines, energy is consumed drawing the air needed for combustion past a partially closed throttle plate.


One of the most employed techniques for cylinder deactivation process now is the Displacement on demand method using Lifter Pin Control Mechanism developed by Delphi Automotive Systems which is an Italy based automobile component manufacturer. In this method we use a system of four components which sense the power requirement and the displaces or deactivate the cylinder. This method is mainly used by General Motors in its automobiles. This method will be explained in the following pages

Another method used mainly for cylinder deactivation is the Deactivation using Variable Profile Camshaft developed by Lotus automotive systems. This method is similar to the V tech engines used by the famous automobile manufacturer Honda.

Another method which can be employed is Active Valve Train technology (AVT) which does away with camshafts. But this method’s feasibility and technology are still in experimental stage. Use it for your reference and study only.


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