multi air engine@vishalchauhan
TRANSCRIPT
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MULTI AIR ENGINE
VISHAL KUMAR
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Introduction‘Multiair’ is an electro-mechanical variable valve actuation technology which is used to control air intake in engine by solenoid valve.
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Solenoid valve Multi air engine is different from other engines because it consists of solenoid valve.
A solenoid valve is an electromechanical technology used for functioning of valves.
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Working of solenoid valve Valve is closed (current not flow) Valve is open (current flow)
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Working of multi air engine
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Lift, timing & duration of valve opening is varied by controlling solenoid valves This is done by ECU when signals are sent from the sensors
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Sensors sense parameters & send signals to ECUECU contains microprocessors with associated softwareThis ECU controls the actuators to work according to requirements
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AdvantagesHigher torque & power- 10 to 15 % increaseReduction in size & weightBetter fuel economy- 7 to 10 % increase
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DisadvantagesOpening & closing of valves requires some power- Electromechanical- alternatorCurrent solenoids cannot run at high rpms;Hidden cost of microprocessor & software controls
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Conclusion Even though some disadvantages are present, we can expect electromechanical valves to replace the conventional camshaft technology.
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FIAT BMWCHRYSLER
Companies
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