This document discusses camless engines. A camless engine uses solenoid actuators instead of a camshaft to open and close valves. It describes the basic 4-stroke cycle of a camless engine involving intake, compression, combustion, and exhaust. It also discusses two methods for actuating the valves electronically without a camshaft: using electro-mechanical rotary solenoid actuators controlled by a microcontroller or a hydraulic system with an electrically operated hydraulic valve. The main sensors used in a camless engine are the engine load sensor, exhaust gas sensor, valve position sensor, and engine speed sensor.

3. This engine doesn’t have the
camshaft to lift the exhaust valve.
This engine doesn’t have the
camshaft to lift the exhaust valve.
Exhaust Valve

4. A Camless engine
uses
A Camless engine
uses
To open Poppet Valves

7. 1
• This phase starts when the tip of
the rotor passes the intake port.
• As the rotor moves the volume of
the chamber expands with the
mixture of fuel & air

8. 2
• As the rotor moves continuously
the air & fuel mixture gets
compressed.

9. 3
• Most rotary engines have two
spark plugs. When the plugs
ignite , create pressure to move
the rotor.
• This cycle continues until the
peak of the rotor passes exhaust
port

10. 4
• Once the peak of the rotor passes
the exhaust port, the high
pressure combustion gasses are
free to flow out of the exhaust .
• The same cycle continues from
intake to exhaust again & again.

11. 5

12. This actuating system can be developed in 2 groups

17. Valve
Crankshaft

18. The camless valve timing electronically
operated by Microcontroller that
controls electro-mechanical rotary
solenoid actuators
The camless valve timing electronically
operated by Microcontroller that
controls electro-mechanical rotary
solenoid actuators

19. Electro-mechanical rotary solenoid actuators

20. Solenoids connected to the
exhaust valves relieving the
engine from load

21. Depending upon the load &speed
microcontroller process the
information and use the pulse width
modulation to actuate the solenoid
valves

22. Advantages of electromechanical Valve

23. 1 The flow of air through engine’s valve directly
controlled .
2 Increases the engine performance.
3 Improves the fuel economy of engine .

27. Used in a source of pressurized
hydraulic fluid and hydraulic actuator
coupled to the poppet valve.
Used in a source of pressurized
hydraulic fluid and hydraulic actuator
coupled to the poppet valve.

28. The flow of pressurized hydraulic
fluid is made through the motion
of first & second position

29. The flow of pressurized hydraulic
fluid is controlled by an electrically
operated hydraulic valve

30. Hydraulic Valve

31. 4 main sensors used in
camless engine are
• Engine load sensor
• Exhaust gas sensor
• Valve position sensor
• Engine speed sensor

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