Transcript
This engine doesn’t have the camshaft to lift the exhaust
valve.
Exhaust Valve
A Camless engine uses
To open Poppet Valves
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
2
• As the rotor moves continuously the air & fuel mixture gets compressed.
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
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.
5
This actuating system can be developed in 2 groups
Valve
Crankshaft
The camless valve timing electronically operated by
Microcontroller that controls electro-mechanical rotary
solenoid actuators
Electro-mechanical rotary solenoid actuators
Solenoids connected to the exhaust valves relieving the
engine from load
Depending upon the load &speed microcontroller process the information and use the pulse width modulation to actuate the solenoid valves
Advantages of
electromechanical Valve
1 The flow of air through engine’s valve directly controlled .
2 Increases the engine performance.
3 Improves the fuel economy of engine .
Used in a source of pressurized hydraulic fluid
and hydraulic actuator coupled to the poppet valve.
The flow of pressurized hydraulic fluid is made through the motion
of first & second position
The flow of pressurized hydraulic
fluid is controlled by an electrically operated
hydraulic valve
Hydraulic Valve
4 main sensors used in camless engine are
• Engine load sensor• Exhaust gas sensor• Valve position sensor• Engine speed sensor
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