Rt1 rabhi.v mce 5 sl
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Overall energy balance
Energy production Energy conversion Energy usage
x x
Joule obtained / joule invested kWh obtained / joule invested Service obtained / kWh investedjCO2/joule
jCO2/kWh CO2/km
Topics:- Oil extraction and refining;- Biofuels;
Topics:- ICE;- Transmission;
Topics:- Weight;- Air drag, rolling resistance;Biofuels;
- GTL, CTL…Transmission;
- Power train energy management.Air drag, rolling resistance;
- On board energy management.
ICE: the primary energy converter
10% gain in ICE efficiency leads to 10% fuel consumption reduction Decisive topic
Improvement of the BSFC mapBetter positioning of engine operation on the BSFC map
Topics:- Improvement of combustion thermodynamic efficiency
(effective expansion ratio)- Reduction in losses: pumping, friction, heat, non-burnt gases.
Topics:- Downsizing-downspeeding;- Temporary energy storage (hybrid)
Tools & strategies: GDI turbo, VVT-VVL, Design & materials, variable & automated transmission, hybrid, VCR
VCR: next step for ICEs evolution
ICE evolution is an asymptote made of asymptotes
ICE evolution:
New bricks are progressively added to ICE technological mix and allow for new combinations for reaching:
1. Optimum efficiency,2. Adapted absolute cost,3. Optimum cost/benefit ratio.
VCR is a new brick for pushing back limits for these targets.
Current step is GDI turbo VVL - Next step is VCR
MCE-5 technology for implementing VCR
1. 6:1 to 15:1 continuous, responsive, precise and cylinder selective CR control;
2. Low-friction, low-sensitive to load ;3. Conventional invariable piston motion;
4. Red line: 6,500 rpm – 130 bar max in-cylinder pressure
MCE-5 : designed according to “what has to be done” and “ what has to be avoided” to provide best VCR service