An introduction to the concept of Cam-Less engines which replaces the conventional Cam and follower assembly with Electro -Mechanical or Electro-Hydraulic actuators controlled by PDM and ECU for better control and improving efficiency of an I.C.Engine.A theoretically simple but practically complex kit of technology which although beneficiary has its limitations and comes with a huge development and production cost.For better insight search for the same on Youtube. https://youtu.be/XrYt1JHNmh4 An interesting take on this.

1. FINOLEX ACADEMY OF
MANAGEMENT AND TECHNOLOGY
Cam-less engine
Presented By:-
Sandesh Jogdand
Sanket Solim

2. Content
 Introduction to Cams, valvetrain
 Current trends in valve train
 Freevalve and camless engine technology
 How it works
 Advantages over conventional systems
 Drawbacks
 Applications
 Conclusion

3. Introduction
 Various technologies has incorporated to improve
performance as well as efficiency of an IC engine.
 It is difficult to achieve both simultaneously.
 New technology has developed which is replacing cam
and camshaft known to be CLE.

4. Cam and Camshaft

5. Conventional Engine

6. Current trends in valve train
 VTEC , VVTI , VTVT etc.
 Stand for Variable timing valve train and similar.
 All of these results as variation in valve parameters.
 Uses of more than one cam profile for the same cylinder.
 Acts as 2 or 3 camshafts in one.
 Satisfactory results are obtained- increased efficiency,
more power, torque

9. Camless and freevalve technology
 Main sensors -
•Engine load sensor(TPS)
•Exhaust gas sensor(LAMDA sensor)
•Valve position sensor
• Engine speed sensor
• Crankshaft Position sensor
ELECTRONIC
CONTROL UNIT
SENSORS ACTUATORS

10.  Sensors sense parameters & send signals to ECU.
 ECU contains microprocessors with associated
software.
 This ECU controls the actuators to work according
to requirements.

11. Camless valve train operation(Actuator)
o The type of cam-less variable valve actuating
systems being developed van be classed in two
groups:-
1) Electro-hydraulic
2) Electro-mechanical
3) Electro-hydraulic-Pneumatic

12. Electromechanical Valve Train
 Actuators / Solenoids are commanded by a Pulse
distribution management unit.
 Valve variable timing is electronically operated by a
microcontroller.
 Make use of rotary solenoid valve and are actuated by
PWM.

14. Advantages
 Offers continuously variable & independent control of all aspects
of valve motion - lift, operation duration, event of opening
 ECV system can control valve velocity, valve acceleration and
deceleration
 Better fuel economy- 7 to 10 % increase.
 Higher torque & power- 10 to 15 % increase.
 Lower exhaust emissions- EGR system is eliminated, since EGR
effect occurs on its own & thus reduces NOx emissions.
 Reduction in size & weight of the engine
 No need of timing belts and gears,camshafts etc.
 Cylinder deactivation can be done, hence even better fuel
economy is possible
 Cold starting problems can be solved by flushing the charge into
exhausts.
 And hence doesn't need 2 staged catalytic converter syatem

15. Disadvantages
• Opening & closing of valves requires some power-
Electromechanical- alternator
Electro-hydraulic- accumulator
• Sophisticated electronic control required for gentle
seating of valves .
• Current solenoids cannot run at high RPMs
(solution under development)
• Hidden cost of microprocessor & software
controls and development.
• For a newer system development cost is there
which can be unpredictable

16. Applications
 Freevalve engines - Currently under
development. used in SAAB 9-5 Sedan car
 2016 Qoros 3 - 1.6L 4 cylinder turbo engine
• 50℅ REDUCTION IN SIZE
• 30℅ REDUCTION IN WEIGHT
• 50℅ REDUCTION IN EMISSIONS
• 30% INCREASE IN FUEL ECONOMY
• 30% INCREASE IN POWER AND
TORQUE OUTPUT
 MAN diesel and turbo company
 Wartsila company

17. Conclusion
o Offers valve-train flexibility.
o Maintains benefits of mechanical system
o Review of benefits expected from a cam-less engine points to
substantial improvement in performance, fuel economy,loss in
emissions etc.
o The improvements found are worth the development cost it
requires.
o Needs simplification and further development to have widespread
application.
o Development and manufacturing costs are very high hence it isn’t
a very viable solution yet.

18. THANK YOU.