• Valves in internal combustion (IC) engines currently operate with fixed timing, lift, and duration during the combustion cycle.
• Altering valve timing and lift at different engine speeds can improve fuel efficiency and reduce emissions.
• However, the use of these in IC engines is currently very limited due to difficulties in manufacturing, assembly, size constraints and cost.
• Hence there is a need of an improved mechanism for enhancing fuel efficiency and reduce emission in valves.

The invention is based on developing and prototyping a mechanism to achieve variable valve lift and timing in IC engines. (Fig. 1&2)

• The technology pertains to a method and mechanism for controlling engine valves, specifically varying valve timing and lift based on engine speed.
• It utilizes a conventional rocker shaft setup, including a cam shaft and rocker shaft.
• A unique component in this mechanism is a rocker with an extended arm featuring an inclinable surface.
• The cam shaft’s angular velocity triggers an actuation mechanism that either moves the rocker axially on the rocker shaft or adjusts the inclinable surface of the extended arm.
• This arrangement of the rocker and extended arm enables dynamic control of valve timing and lift in response to changes in engine speed.