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Länk --- BMW To Introduce New Diesel Mild Hybrid Concept in Geneva 22 February 2008 BMW will introduce the concept BMW Vision EfficientDynamics at the upcoming Geneva Motor Show (6-16 March)—the company’s first combination of a 4-cylinder diesel engine with BMW ActiveHybrid Technology in a large Sports Activity Vehicle. Based on a BMW X5, the diesel mild hybrid concept delivers average fuel consumption of 6.5 liters per 100 kilometers (36 mpg US) in the EU test cycle and a CO2 emission level of 172 grams per kilometer. Acceleration from 0-100 kph is 8.9 seconds. The 2.0 liter 4-cylinder diesel engine with Variable Twin Turbo, third-generation common rail injection and all-aluminum gearbox housing delivers 150 kW/204 bhp and generates a maximum torque of 400 Nm (295 lb-ft) between 2,000 and 2,250 rpm. It is the first diesel in the world with a specific power output of more than 100 bhp per liter of capacity. The motor/generator in the mild hybrid system contributes 15 kW and maximum torque of 210 Nm (155 lb-ft) to vehicle acceleration. The total output of the vehicle is 165 kW. The hybrid module is based on technology developed as part of the hybrid co-operation between BMW and Daimler that goes beyond their partnership with GM on the two-mode system. (Earlier post.) BMW has also introduced a concept based on the full hybrid two-mode system. (Earlier post.) The concept uses two parallel vehicle power systems. In addition to the conventional 12 volt system supplied by the AGM starter battery there is also an 120 volt system which is fed by electrical power from the generator and a new lithium-ion battery pack. The high-voltage network and the Li-ion battery can support ancillary systems such as ventilation and air conditioning when the engine is switched off at idle or stop. The Vision EfficientDynamics concept is fitted with a new 8-speed automatic transmission developed jointly by BMW and ZF Getriebe GmbH. Presented at Geneva for the first time and ready for serial production use, this 8-speed automatic transmission makes an additional contribution to reducing fuel consumption and exhaust emissions with its direct connection to the engine and minimized torque-converter slip. The concept car also features a solar roof which acts as an additional energy source for the vehicle power supply which is independent of the engine. High-power solar cells covering a surface area of some 1.0 square meters generate a maximum energy of one kilowatt hour for consumers inside and outside the vehicle. This enables pre-heating of the gear oil, thereby shortening the inefficient warm-up phase. Direct energy supply is possible during standstill for ventilation or for operating a cool box, audio equipment, a mobile phone charger or for charging the vehicle battery. An innovative wheel rim design makes an additional contribution to reducing fuel consumption, by requiring one kilowatt less of propulsion power at a speed of 160 km/h. The aerodynamic shaping of the spokes reduces rim ventilation. This has a positive impact on the aerodynamic properties of the vehicle. --- Erik ___ Trender är till för amatörer, vi andra går på instinkt! | |
Transocean |
Tufft, men dieseln är väl snart ute, när börjar BMW med Downsizing a la VW? Alltså 1.4 liters bensinmotorer som lånar commonrailteknologi från dieselsidan, grymt snåla med bra vrid. Även mercedes skall komma med en ny 1.8 liters bensinare som ger över 200 hk och diesellikt förbrukning. |
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