For Renault, it is now imperative to drastically reduce fuel consumption and CO2 emissions. Already in the top 3 in terms of average CO2 emissions, Renault is committed to leadership in Europe. To achieve this goal, Renault is working on low-emission vehicles and zero emission of CO2, with a desire to give as many people as the most effective technologies at an affordable cost. Developments of mechanical projects fall into two directions:
• an unprecedented commitment to electric motors: the 100% electric vehicle that produces no CO2 during its use. Renault aims to become a leader in the mass distribution of electric vehicles. The Renault-Nissan is developing a complete range of 100% electric powertrain, with a power between 50 kW and 100 kW (70 hp and 140 hp).
• new technologies to conventional engines and transmissions. Renault is developing a new generation of turbocharged internal combustion engines, and new automatic transmissions.
° dCi engines “modular” 90 hp to 115 hp
With the move to Euro 5 and Euro 6 petrol engines will become more attractive. The new family dCi Renault expects this trend. Launched in 2012, it should account for 85% of gas volumes from Renault in 2015. These engines “modular” of 0.9 to 1.2 liter capacity, will be offered in 3 and 4 cylinder and centered on the portion of power of 65 kW to 85 kW (90 hp to 115 hp). Several vehicles with these engines will emit less than 100 grams of CO2 per kilometer.
° The future engine 1.6 dCi 130
This future engine of 1.6 liter capacity to develop its launch power of 96 kW (130 hp). He is co-developed in the framework of the Renault-Nissan and will be launched in 2011. CO2 emissions will be reduced by 25 grams compared to current diesel engines of 1.9 l.
° The dual-clutch transmission
Marketed next year, it will combine a quality-of-way issue and reports the reduction of CO2 emissions.It will offer drinks identical to those of a manual gearbox.
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CO2 emissions: to be Europe’s leading
For Renault, respect for the environment is the major challenge facing the auto industry if it wants to ensure its sustainability. It is now imperative to drastically reduce the fuel consumption of vehicles, while ensuring, in the shortest time possible, the transition to zero emission vehicles CO2. Renault considers it essential to offer more customers the best technologies at an affordable price. In 2008, Renault was among the top three European manufacturers in terms of average emission of CO2.Compared to 1995, average CO2 emissions of Renault declined 25%, even though for 14 years, vehicles sold are quieter and safer. Renault now wants to get to the top of European carmakers on emissions of CO2. The Group works for it in two directions:
° a commitment unprecedented in the 100% electric motors developing these breakthrough technologies. In use, the 100% electric vehicle produces zero emissions of CO2,
° the introduction of new technologies on conventional engines and transmissions to significantly reduce CO2 emissions.
A technological breakthrough
Compared to technical solutions that provide CO2 reductions of around 10, 20 or 30 g / km, Renault has chosen a mobility solution that CO2 emissions are a real breakthrough. This grand project: the 100% electric vehicle. In use, it generates no CO2 emissions or pollutants, or noise. Renault’s objective is to become a leader in the mass distribution of electric vehicles.
The 100% electric vehicle: a compelling solution
Several factors explain the commitment of Renault’s electric vehicles:
-Awareness of global warming linked to CO2 emissions;
- Tightening of laws vis-Ã -vis CO2 emissions
-Structural increase in oil prices;
Growth of urban mobility needs and identification of a large potential market in Europe, made up largely by customers making daily round trips home – work, “SWITCH” urban, for which the electric vehicle is an effective solution;
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mastering the technology of lithium-ion batteries, developed under the Renault-Nissan by Automotive Electric Supply Corp. (AESC), a joint venture between Nissan and NEC. Significant progress has been made on these batteries in energy density, safety, durability and cost reduction. These conditions can provide the customer with an electric vehicle, attractive driving pleasure and self-sufficient;
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developing new modes of consumption (monthly plan, pay on demand service, etc..) applied in many industries and applicable to the automobile.
The development of a range of 100% electric powertrains
The Renault-Nissan is developing a range of 100% electric powertrains that will cover the range of 50 kW to 100 kW (70 hp to 140 hp). It is applicable to all categories of vehicles: sedans urban family through vans and vans. The first 100% electric powertrain will equip a notchback sedan and a utility vehicle type Kangoo 2011.
The development of electric vehicles does not seek to replace the entire fleet. Thanks to its versatility, and progress will be made over the years, the engine will remain an appropriate solution for many customers.
To reduce significantly emissions of CO2, Renault is working in parallel:
-Fundamentals of the vehicle mass, aerodynamics (CdA), friction bearings;
-Management of electrical energy (battery charging during braking and deceleration) and thermal (the thermal management that accelerates the rise in temperature of the engine);
Cross-technologies like stop & start, which automatically cuts the engine off;
-The widespread downsizing of internal combustion engines (smaller engine supercharged by a turbocharger works with better performance) in both petrol and diesel. Note that the potential reduction of CO2 is now far more important than diesel fuel.
-Gearboxes with improved efficiency, manual or automatic
Develop these two points.
The future range of engines TCe “modular”
Renault accelerates downsizing gasoline
Gasoline engines must meet the following challenge: to significantly improve energy efficiency, particularly in urban traffic. Downsizing and turbocharging bring solid solutions. Launched two years ago, and a pioneer in its category (engine displacement of 1.2 l), the dCi 100 exemplifies this approach. Equipped with this engine, Renault Clio displays CO2 emissions the lowest in the category of petrol engines of 100 hp: 137 grams (a combined cycle fuel consumption of 5.8 l/100 km).To maintain the competitiveness of the range of Renault petrol and provide a significant reduction in CO2 emissions, Renault has developed a modular engine family TCe.
The family “modular” means TCe 90-115
With the move to Euro 5 and Euro 6 petrol engines should become even more attractive. The new family TCe 3 and 4 cylinder anticipates this evolution. It will cover the range of displacement of 0.9 liters to 1.2 liters and replacing normally aspirated engines with a displacement of
1.2 l to 1.6 l. Supercharged by a low inertia turbocharger, this engine will focus on the portion of power of 65 kW to 85 kW (90 hp to 115 hp). Renault eventually develop more powerful versions. The design of the database engine allows direct injection of power per liter and even higher. CO2 emissions will be reduced from 30 g to 40 g, compared with the engines replaced, on some vehicle applications, CO2 emissions below 100 grams per kilometer. The first versions of these engines will be launched in two and a half years . Renault believes that by 2015 some 85% of its volumes of petrol in Europe will be covered by these engines. This new family of modular engines is developed under the Renault-Nissan. This practice helps to share the ticket, to achieve economies of scale and adapt the development of the mechanical characteristics of a region. Renault uses his knowledge of European market and its experience in the supercharging to develop them within the Alliance.
The future dCi range: a completely new engine
The advantages of dCi
The 4-stroke diesel engine with direct injection common rail (common rail) and supercharged by the turbocharger is now the solution operator of passenger cars which presents
the best efficiency. A diesel vehicle consumes
average 20% to 30% less fuel than a gasoline vehicle levels
equivalent performance.
DCi engines are now well positioned in terms of CO2 emissions. For example:
- Renault Twingo dCi 85 shows 104 grams of CO2 per kilometer (or a combined cycle fuel consumption of 4.0 l/100 km). – New Renault Megane saloon emits 118 grams of CO2 per kilometer (combined cycle fuel consumption of 4 , 5 l/100 km)
- – Laguna dCi 110, 130 grams of CO2 per kilometer (combined cycle fuel consumption of 4.9 l/100 km). Renault engineers exploit the maximum dCi technology by making changes significantly for them to spend the future emission standards and make them even less consuming. These new generation dCi will get many applications in the vehicle 100 grams of CO2 per kilometer.
1.5 dCi engines of new generation
The 1.5 dCi engine (type K9K) occupies a special place in the diesel range. This is the Renault engine as sold nearly 900,000 units produced in 2008 in Valladolid (Spain) and Bursa (Turkey).Available in multiple power levels (currently 65 hp to 110 hp), it equips many models Renault (Twingo Laguna) and Dacia. Its simple design and low level of friction makes it a particularly powerful engine in ratio of benefit versus cost.
Renault will make significant progress in this 4-cylinder engine of 1.5 liter capacity. These future developments reduced CO2 emissions of about 20 grams per kilometer will be offered from 2012.
The future engine 1.6 dCi 130
Entirely new, this engine with a displacement of 1.6 l to display its launch power of 96 kW (130 hp).This corresponds to a decrease in capacity of 16% compared to current diesel engines of 1.9 liter of equivalent power. Renault eventually develop more powerful versions. CO2 emissions will be reduced by 25 grams, compared with the same engine. Reduction that will be added gains on the vehicle (aerodynamics, friction, vehicle weight, etc..). It will be predisposed to the Euro 6 emission standard. Covered by more than 15 patents Renault, the engine will be the heart of the range of C segment and a key engine for the D segment and vans. Its launch is scheduled for 2011. This project, called R9M, is co-developed under the Renault-Nissan.
The 2.0 dCi and above
The 2.0 dCi (M9R type) of new generation will be available in 2012. Meanwhile, Renault will roll out its policy of downsizing the vehicles by replacing engine
Current by a 2.5-liter version 2.3 dCi, which will inherit the same genes as the 2.0 dCi. The V6 dCi (V9X type) it will continue to equip the top models of the Group.
Automatic transmissions
The dual-clutch transmission
Traditional automatic transmissions rather prefer the comfort gearshift for consumption. By developing new automatic transmission, Renault pursues a dual objective:
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improve the mechanical efficiency compared to conventional automatic transmissions (hydraulic coupler) by using technologies of the gearboxes.
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use the potential of automating the gearbox to operate the motor areas of improved energy efficiency and consumption and display identical to manual gearboxes. Renault will offer a dual-clutch transmission in a year. The double clutch to change gear without ceasing to transmit the torque. This gearbox combines comfort of use (Report change smoothly and without breaking traction) with CO2 emissions identical to those of a manual transmission, a reduction of 15% over a traditional automatic transmission.