Variable Valve Actuation (VVA) - Cnam - Chaire de turbomachines

249 Pages·2013·14.83 MB·English

MULTIDISCIPLINARY UNIVERSITY
1962 2013
11 Faculties
Faculty of Mechanics and Technology,
,
Faculty of Electronics, Communications and Computers
Faculty of Sciences, Faculty of Mathematics, Faculty of Letters, Faculty of Social Sciences, Faculty of Economics,
Faculty of Law and Administration, Faculty Physical Education and Sports, Faculty of Theology, Faculty of Education Sciences
~ 12 000 students in bachelor and master degrees,
~ 200 PhD students,
Teaching & Research personal ( ~ 600 persons)
2013
o r g a n i z e
THE ONE DAY SCIENTIFIC WORKSHOP
e n t i t l e d
Variable Valve Actuation (VVA).
A technique towards more efficient engines
18 April 2013
University of Pitesti, Romania
Amphitheatre CC1, B-dul Republicii nr. 71, Pitesti
OPENING SPEECHES
Mihai BRASLASU – Vice Rector of the University of Pitesti, Romania
Thierry MANSANO – Head of Engine Calibration Department of Renault Technologie Roumanie (DCMAP - RTR)
Pierre PODEVIN – Cnam Paris, LGP2ES, EA21, France. Co-organizer
Adrian CLENCI – Head of Automotive and Transports Department – University of Pitesti, Romania. Organizer
o r g a n i z e
THE ONE DAY SCIENTIFIC WORKSHOP
e n t i t l e d
Variable Valve Actuation (VVA).
A technique towards more efficient engines
18 April 2013
University of Pitesti, Romania
Amphitheatre CC1, B-dul Republicii nr. 71, Pitesti
PROGRAMME
10h00 – 11h00: Giovanni CIPOLLA, Politecnico di Torino, Italy, former GM Powertrain.
Variable Valve Actuation (VVA): why?
11h00 – 12h00: Eduard GOLOVATAI SCHMIDT, Schaeffler Technologies AG, Germany.
Consistent Enhancement of Variable Valve Actuation (VVA)
12h00 – 13h30: Lunch Break
14h00 – 15h00: Stéphane GUILAIN, Renault France, Powertrain Design and Technologies Division.
VVT/VVA and Turbochargers: which synergies can we expect from these technologies?
15h00 – 16h00: Hubert FRIEDL, AVL GmbH Austria, Powertrain Systems Passenger Cars.
Trends in Applications of VVA Systems for Fuel Efficient Powertrain
16h00 – 16h30: Coffee Break
16h30 – 17h30: Romain Le FORESTIER, VOLVO Powertrain, France.
Advanced combustion and heavy duty engine integration of a hydraulic camless system
17h30 – 18h30: Adrian CLENCI, University of Pitesti, Romania, Pierre PODEVIN, Le Cnam de Paris, France.
VVA technique as a way to improve Spark Ignition Engine efficiency. Results obtained at the University of Pitesti
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
WHY ORGANISING ?
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
HISTORY
of
VARIABLE VALVE ACTUATION at UNIVERSITY of PITESTI
1977: a mechanical cam phasing device (VVT) applied on the gasoline engine of the 4WD ARO vehicle by
Professor Vasile Dumitrescu and his team;
1977 - 1990: various VVA solutions were created and tested by Professor Vasile Dumitrescu and his team
1985 - 1990: various VVA solutions by Professor Dumitru Cristea and his team:
- variable intake valve lift mechanism by rocker arm’s variable length;
- cylinder deactivation by intake&exhaust valves deactivation
1985 – present: several Continuous Variable intake Valve Lift mechanisms were developed by
Professor Vasile Hara and his team
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
V i V L
ariable ntake alve ift
by
Professor Vasile Hara and his team
UNIVERSITY of PITESTI & le Cnam de Paris
1985 – 1990: 2 engine prototypes (4 in-line cylinders gasoline engine) were built with the aid of Dacia plant
2005: re-launching the research on ViVL by Hara&Clenci in cooperation with le cnam de Paris
A carburetor engine featuring A single point injection engine featuring
manual actuation of intake valve law automatic actuation of intake valve law
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
V i V L
ariable ntake alve ift
by
Professor Vasile Hara and his team
UNIVERSITY of PITESTI & le Cnam de Paris
March 2006: successful operational tests of the throttle-less engine at idle operation
The single point injection engine featuring throttle-less control thanks to the ViVL
Stable idle operation @ 800 rpm & λ = 1.6 (lean mixture)
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
V i V L
ariable ntake alve ift
by
Professor Vasile Hara and his team
UNIVERSITY of PITESTI and le Cnam de Paris
October 2006 - August 2007: adaptation of a multi-port fuel injection system (intake and exhaust on the
same side of the cylinder head)
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
V i V L
ariable ntake alve ift
by
Professor Vasile Hara and his team
UNIVERSITY of PITESTI and le Cnam de Paris
2008: adaptation of the prototype ViVL engine on a Dacia Logan car
Ecologic Vehicle by Intake Throttle-less Actuation
The Scientific Workshop
Variable Valve Actuation (VVA).
A technique towards more efficient engine
V i V L
ariable ntake alve ift
by
Professor Vasile Hara and his team
UNIVERSITY of PITESTI and le Cnam de Paris
September 2012 – April 2013: adaptation of a crossflow engine head (hemispheric combustion chamber)