Viewing 1 to 30 of 64
Technical Paper
Hans-Hermann Braess, Karl-Nikolaus Regar
Back in the first two decades of automobile development, electric propulsion was a serious competitor for the internal combustion engine. Electrically-propelled vehicles, however, soon proved unable to satisfy users' increasing performance demands in terms of range, acceleration, top speed and hill-climbing, together with such factors as operating life, initial purchase price, running costs and reliability. Engineers investigating electric propulsion today face precisely the same unwelcome legacy as their predecessors, despite many and varied attempts in the meantime to improve the components of the electric vehicle's drive system (energy storage device, motors, controller). Progress in battery development, particularly in the case of the NaS system, has nevertheless enabled us at least partly to overcome the previous problems associated with electric drive systems, though it cannot be claimed that all obstacles to its commercial application have been eliminated as yet.
Technical Paper
Bill Bitting, F. Gschwendtner, W. Kohlhepp, M. Kothe, C.J. Testroet, K.H. Ziwica
BMW has undertaken a comprehensive program including laboratory simulation rig tests, engine dynamometer and fleet evaluations to evaluate the influence of mechanical and fuel variables on induction system deposits in modern port fuel injected (PFI) spark ignition engines. The primary focus of the program has been the deposit buildup on intake valves (IVD) and associated driveability impacts. Initial investigations of engine modifications yielded only marginal improvements relative to deposit build-up and, therefore this led to investigations of the effect of gasolines and additives. Fuel quality, type, quantity of additives and alcohol content have all been found to be major contributing factors to intake valve deposition. In addition, intake valve deposit weight has been directly related to warm-up phase driveability concerns using a newly developed driveability procedure.
Technical Paper
Rudolf R. Maly, Volker Schaefer, Heinz Hass, G. F. (Barry) Cahill, Pierre Rouveirolles, Anders Röj, Rainer Wegener, Xavier Montagne, Alessandra Di Pancrazio, Julian Kashdan
Over the next decades to come, fossil fuel powered Internal Combustion Engines (ICE) will still constitute the major powertrains for land transport. Therefore, their impact on the global and local pollution and on the use of natural resources should be minimized. To this end, an extensive fundamental and practical study was performed to evaluate the potential benefits of simultaneously co-optimizing the system fuel-and-engine using diesel as an example. It will be clearly shown that the still unused co-optimizing of the system fuel-and-engine (including advanced exhaust after-treatment) as a single entity is a must for enabling cleaner future road transport by cleaner fuels since there are large, still unexploited potentials for improvements in road fuels which will provide major reductions in pollutant emissions both in vehicles already in the field and even more so in future dedicated vehicles.
Technical Paper
Helmut Eichlseder, Eckard Baumann, Peter Müller, Stephan Rubbert
This paper summarises the potential for the use of a gasoline direct injection engine for fuel economy benefits. Various engine technologies are compared for the greatest reduction in fuel consumption at the steady state point 2000rpm/2 bar. This is an important driving point in the EU cycle. The direct injection engine when used in an unthrottled lean stratified mode shows the greatest potential. Calculations show a fuel economy of a middle class vehicle can be increased by 12% using a DI over the EU cycle. The catalytic aftertreatment system is discussed and it is concluded that a close coupled pre-catalyst, a NOx trap and double injection are a good overall solution for the minimisation of exhaust gas emissions from a DI engine.
The 2018 CT6 PHEV is an engaging and efficient luxury sedan aimed primarily at China’s burgeoning New Energy Vehicle market.
The 7th generation 5 Series, known internally as the G30, focuses on power, torque, mass and aero-drag reduction and refinement.
Floyd Allen, Powertrain Systems Executive, FEV Inc. set the tone for a Tuesday morning panel session at the SAE 2012 World Congress in Detroit by saying there is universal agreement that the United States needs to reduce its consumption of petroleum and develop some alternative energy sources capable of powering “at least a meaningful portion of our mobility needs.” Coming up with the solution(s) is the tricky part.
FlexRay networks have seen steady growth since first hitting the roads in 2006, but the technology is still struggling to gain acceptance beyond German luxury carmakers. Many engineers have opted to stick with multiple CAN (controller area network) buses, while some are studying ethernet’s viability.
Graduate students at the Clemson University International Center for Automotive Research (CU-ICAR) have developed their first concept car, dubbed Deep Orange. Based on a BMW 1 Series, the car is a range-extended electric vehicle (EV)—similar in architecture to the Chevrolet Volt—expected to achieve the equivalent of 100 mpg for a combined U.S. EPA city/highway cycle.
BMW used the occasion of the North American International Auto Show to introduce the sixth generation of the 3 Series sedan and ActiveHybrid 3, dubbed the first full hybrid compact sport sedan in the premium segment.
General Motors, Ford, and BMW test thermoelectric devices that recapture energy lost in car exhaust.
BMW Group and Toyota Motor Corp. on Dec. 1 signed a memorandum of understanding for mid- to long-term collaboration on next-generation environment-friendly technologies. One definite area of collaborative research is next-generation lithium-ion battery technologies.
The reliability of fast-charging of plug-in vehicles got good grades in a recent joint testing program by General Motors and BMW. Engineers conducted dc fast charging according to the SAE J1772 standard over several days and came away from the experience confident that the charging stations of several suppliers that participated in the test program “will consistently allow an electric vehicle to take on an 80 percent charge in about 20 minutes.”
U.S. EPA five-cycle tests for fuel economy encourage stop-start systems, but loss of air-conditioning operation may be unacceptable.
Increasing demand for systems development, testing, and calibration are driving FEV's investments in engineers and facilities.
New internal-combustion engine for the U.S. is close in performance to naturally aspirated six-cylinder. It features twin-scroll turbo, direct injection, Valvetronic variable lift and timing system, electric water pump, and spray-on cylinder “liners.” Active-E all-electric car test fleet goes into lease-program phase later this year.
By bundling induction, fuel, and hybrid-system solutions with downsizing, Bosch is offering OEMs up to 40% greater fuel efficiency for approximately 1000 euros added cost per vehicle.
Hybridization may prove to be the most significant way forward for diesel engine technology, producing very impressive fuel and emissions savings. But BMW's fundamental diesel-engine efficiencies continue to improve with common rail injection pressures now reaching around 2400 bar.
A new system called MSYS is designed to bring greater smoothness, energy efficiency, and reduced weight to EV and HEV transmissions.
MiniE field tests, and ActiveE developments, pave way for eventual production Mega City Car electric car.
BMW revealed at the 2009 Frankfurt Motor Show the most extreme interpretation of its EfficientDynamics program with the Vision EfficientDynamics concept car.
The new ALL4 driveline was designed to keep fuel consumption and emissions comparable to those of 2-wheel drive Mini models.
BMW is carrying out exhaustive R&D work on recovering engine waste heat. It believes there is great potential for considerable fuel savings if electric energy required by all vehicle onboard systems could be produced via the use of waste heat.
The PhoeniX gave 2011 Geneva Motor Show visitors a glimpse into future thinking from the car manufacturer. Its powertrain is being developed for future Saab models, as are many of its other design and technical features.
Volvo isn't trying to be BMW or Mercedes-Benz, promoting the all-new 2017 S90 sedan as a true luxury car with an emphasis on technology and safety rather than searing performance.
Vehicle has 18 mi/30 km all-electric range from lithium-ion battery pack. Uses 2.0-l twin-scroll turbo engine with combination peak output of 270 hp/201 kW and 300 lb ft/407 N-m. Offers "predictive navigation" for high fuel efficiency, and can save battery capacity for areas that may require electric vehicle-only operation. European drive cycle ratings are 3.8 l/100 km (62 mpg) and just 89 grams CO₂/100 km.
Emissions are diesel's perception problem; the best way to solve it is by coming clean on new-age emissions tests.
The BMW Group and PSA Peugeot Citroën have entered a new phase of their collaboration, by signing an agreement to set up a 50-50 equity joint venture named BMW Peugeot Citroën Electrification. The agreement was signed on Feb. 1 by Norbert Reithofer, Chairman of the Board of Management of BMW AG, and Philippe Varin, Chairman of the Managing Board of PSA Peugeot Citroën.
BMW is now showing an exciting sister vehicle to its upcoming i8 coupe, the i8 Concept Spyder, an open-top version of the two-seater. Both cars employ a plug-in-hybrid powertrain system, in keeping with the i brand's focus on vehicles purpose-designed for electrified powertrains; the third model in the i lineup will be the all-electric i3.
FIRE engines and Multiair valvetrains from Italy are keys to boosting Chrysler’s fleet fuel efficiency by 2014, says new Powertrain boss Paolo Ferrero.
Viewing 1 to 30 of 64


  • Range:
  • Year: