Newsgroup: it.discussioni.auto
Titolo: [ENG] [HONDA] Honda Debuts 'Variable Cylinder Management' V6 3.0-liter i-VTEC Engine

      Honda Debuts 'Variable Cylinder Management' V6 3.0-liter i-VTEC Engine
      Honda Debuts 'Variable Cylinder Management' V6 3.0-liter i-VTEC Engine
      - New Powertrain Will be Featured in New Inspire Model -
      Tokyo, June 18, 2003 --- Honda Motor Co., Ltd. today introduced a new
V6 engine featuring the latest version of its i-VTEC ('intelligent' VTEC)
technology. Through new 'Variable Cylinder Management' technology, the V6
3.0-liter i-VTEC engine runs on all six cylinders during acceleration and
when high output is required, yet employs only three cylinders during
cruising and at low engine loads. The new engine thus combines the
effortless performance of a 3.0-liter V6 engine, while offering superior
fuel economy of 11.6 km/liter*1 (27.3 mpg) --- comparable to that of a
2.4-liter 4-cylinder engine*2. This new powertrain will debut in the new
Inspire model scheduled for release in Japan June 19, 2003.
      In addition to its low fuel consumption, this V6 3.0-liter i-VTEC
engine also significantly reduces exhaust emissions, helping the Inspire
meet Japan's Ministry of Land, Infrastructure, and Transportation
requirements for Ultra-Low Emissions and 2010 fuel consumption standards,
and making it eligible for preferential 'Green Tax' treatment. The new
engine achieves this by combining high-density catalytic converters located
directly below each cylinder head for further improved exhaust gas
processing at low engine temperatures with exceptionally fine air / fuel
ratio control.
      The adoption of a variable intake system, over-sized intake valves,
and low back-pressure catalytic converters further improve engine
respiration efficiency, helping deliver class-leading performance, with
maximum output of 184 kW (250 PS, 247 HP) and maximum torque of 296 N-m
(30.2 kg-m, 218 lb-ft)*3, all on unleaded regular gasoline.
      *1 Inspire 10-15-mode fuel consumption, Ministry of Land,
Infrastructure, and Transportation test values
      *2 Vehicle in the same weight class as the Inspire: Accord Sedan 2.4
liter (10-15-mode fuel consumption of 12.0km / liter, 28.2 mpg)
      *3 Inspire model net figures
      V6 3.0-liter i-VTEC engine
      The 'Variable Cylinder Management' system analyzes throttle opening,
vehicle speed, engine speed, and gearing to determine that the car is
cruising, and then idles the intake and exhaust valves of the three
cylinders in the rear cylinder bank. With zero valve lift, the cylinders are
sealed, and no fuel is injected. Pumping losses are thus reduced by as much
as 65% and low fuel consumption is realized.
      When operating in 3-cylinder mode, engine vibration is reduced by
extrapolating vibration from the change in crankshaft rotation speed and
sending the information to the 'active control' engine mount, which
compresses / extends an actuator in same-phase, same-period motion to dampen
the engine mount. Similarly, a speaker creates an opposite phase sound or
'active noise control', to provide a canceling effect, for a quieter
interior which leaves the driver unaware of changes in cylinder activation.
 
http://world.honda.com/news/2003/4030618_1.html
      -- 
      L'Integralista
 
www.davidebretti.it
 - 21Y, 400MHz, 200/125/85HP, Turin, Italy
      Honda CivicTypeR 30YA #21355, HRV 3p (in vendita), Jazz 7speed (soon
driver)
      «TDI sta a VTEC come eiaculazione precoce sta a orgasmi multipli» cit.
FM

       Honda Debuts 'Variable Cylinder Management' V6 3.0-liter i-VTEC
Engine
chiedo scusa per l'allineamento taroccato del post ma ho fatto cut/past
piccola spiega... da quanto ho capito si tratta di un 3.0l V6 da 250cv che
può spegnere 3cyl in certe situazioni promettendo un consumo di quasi 12kml.
francamente mi sembra una cagata ma la fonte è autorevole, quanto consuma
oggi un 3.0 da 250cv?
andrà su una berlinona ma non escludo di vederlo altrove.


 francamente mi sembra una cagata ma la fonte è autorevole,
Perche' ti sembra una cagata?? la MERCEDES CL e classe S hanno una funzione
che sui motori v12 (o v8 non ricordo bene) puo' disattivare la meta' dei
pistoni.
Perche' non puo' farlo honda?

 Perche' non puo' farlo honda?
mi sembra una cagata (attenzione, solo all'atto pratico, non a livello
teorico) per il motivo che ha detto jhonny.
inoltre mercedes offre un dispositivo simile ma non ti lascia in funzione
solo 3 cilindri per spostare una berlina... non ricordo se da 12 passi ad 8
oppure da 8 passi a 4... però ripeto che sicuramente non te ne lascia solo 3
con tutti i problemi del caso.
non vorrei che questo fosse un drammatico segnale del cambio filosofico di
honda ANCHE a livello motoristico.


 maximum torque of 296 N-m (30.2 kg-m, 218 lb-ft)*3, all on unleaded
Potenza e coppia massime a quanti giri?
gi

 Potenza e coppia massime a quanti giri?
bella domanda..... appena ne so qualcosa vi tengo aggiornati.


Potenza e coppia massime a quanti giri?
Speriamo non 8900 l'una e 8400 l'altra... :)
Elfer