Camcon Auto Limited

Roger Derrick Stone

Richard James Tyrrell

Owen James Warren Evans

A valve control system is provided for an internal combustion engine, the engine having at least one cylinder with at least one set of at least two valves. All the valves in the set are either inlet valves or exhaust valves, and the system is configured to selectively operate the set of valves in a single valve mode of operation during which only one valve of the set is open at any time.

Valve control systems for internal combustion engines and methods of operation thereof

An assembly for coupling a valve stem to an actuating member of an actuator in a desmodromic valve actuation mechanism comprises a spherical bearing having two portions each of which defines a respective bearing surface which is complementary to the bearing surface defined by the other portion, at least one of the surfaces being part spherical, one of the portions being arranged to be coupled to the actuating member and the other portion being arranged to be coupled to the valve stem; and a resilient arrangement which exerts a biasing force on one of the bearing portions and provides resilience in the coupling provided by the assembly between the valve stem and actuating member.

Desmodromic valve systems and methods of operation thereof

A valve control system for an internal combustion engine, the engine having at least one cylinder with at least one intake or exhaust valve and a piston and the valve being operable independently of the rotation of the engine crankshaft. The system is configured to generate a control signal that controls a preconditioning actuation cycle of an actuator prior to a first combustion cycle of the engine, receive a feedback signal relating to an operating condition of the actuator during the preconditioning actuation cycle, and generate a modified control signal that controls a combustion actuation cycle of the actuator, modified with reference to the feedback signal. This recalibration of the valve control signals allows the current operating conditions of the valve train to be taken into account before the first combustion cycle of the engine.

Growing community of inventors

East Sussex, United Kingdom

Roger Derrick Stone