The New Amazing BMW i8
1 Presentation
The BMW i8 was a plug-in hybrid sports car developed by BMW. The i8 was part of BMW's electrified fleet and was marketed under the BMW i sub-brand. The production version of the BMW i8 was unveiled at the 2013 Frankfurt Motor Show and went on sale in Germany in June 2014 Deliveries to retail customers in the United States began in August 2014 A roadster variant was launched in May 2018 Production ended in June 2020.
The 2015 BMW i8 accelerated from 0 to 100 km/h (62 mph) in 4.4 seconds and had an electronically limited top speed of 250 km/h (155 mph)[5] The 2015 model year i8 had a 7.1 kWh lithium-ion battery pack that provided an all-electric range of 37 km (23 mi) under the new European driving cycle. Under the U.S. EPA cycle, the EV range was 24 km (15 mi). The battery capacity of both the BMW i8 Roadster and i8 Coupe was increased to 11.6 kWh in 2018, increasing the NEDC electric range to 55 km (34 mi) for the coupe and 53 km (33 mi) for the roadster.
The BMW i8 coupe had a fuel economy of 2.1 L/100 km (134.5 mpg-imp; 112.0 mpg-US) in the NEDC test with carbon emissions of 49 g/km. The EPA rated the i8's combined fuel economy at 76 MPGe (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent) and 29 miles per gallon (6.7 L/100 km) in pure gasoline mode.
By March 2020, global sales of all variants had reached more than 20,000 units, making the BMW i8 the world's best-selling plug-in electric sports car, and surpassing the sales of all competitors in its segment combined.
2 BMW i8 Concept (2011)
BMW i8 Concept was presented at the 2011 International Motor Show in Germany.
The BMW i8 Concept plug-in hybrid electric vehicle featured an electric motor located in the front axle driving the front wheels with an output of 96 kW (131 PS; 129 hp) and 250 N⋅m (184 lb⋅ft), a turbocharged 1. 5-liter turbocharged rear-wheel drive engine rated at 164 kW (223 PS; 220 hp) and 300 N⋅m (221 lb⋅ft) of torque, with a combined output of 260 kW (354 PS; 349 hp) and 550 N⋅m (406 lb⋅ft), a 7.2 kWh (26 MJ) lithium-ion battery providing 35 km (22 mi) of all-electric range. All four wheels provided regenerative braking. The location of the battery pack in the energy tunnel gives the vehicle a low center of gravity, which improves its dynamics. Its top speed was electronically limited to 250 km/h (155 mph) and it had to go from 0 to 100 km/h (0 to 60 mph) in 4.6 seconds. Under normal driving conditions, the i8 was expected to achieve 80 mpg-US (2.9 L/100 km; 96 mpg-imp) on the European cycle. A full battery charge would take less than two hours at 220 V. The positioning of the engine and drivetrain above the axles allowed for a 50/50 weight distribution.
The vehicle was unveiled at the 2011 International Motor Show in Germany, followed by CENTER 548 in New York, the 42nd Tokyo Motor Show 2011, the 82nd Geneva Motor Show 2012, the BMW i Born Electric Tour at the Palazzo Delle Esposizioni, Via Nazionale 194 in Rome, and Auto Shanghai 2013.
3 BMW i8 coupe prototype (2013)
The design of the BMW i8 coupe prototype was based on the BMW i8 concept. The BMW i8 prototype had an average fuel efficiency of less than 2.5 L/100 km (113.0 mpg-imp; 94.1 mpg-US) according to the new European driving cycle with carbon emissions of less than 59 g/km. The i8, with its carbon fiber reinforced plastic (CFRP) interior, lightweight and aerodynamically optimized body, and BMW eDrive technology, offered the dynamic performance of a sports car, with a predicted 0-100 km/h (0-62 mph) sprint time of less than 4.5 seconds using both power sources. The BMW i8's plug-in hybrid system included a 1.5-liter, three-cylinder BMW TwinPower Turbo gasoline engine combined with the BMW eDrive technology used in the BMW i3 and developed a maximum output of 170 kW (228 hp). The BMW i8 was the first BMW production model to be powered by a three-cylinder gasoline engine, and the resulting specific power output of 115 kW (154 hp) per liter of displacement was comparable to that of high-performance sports car engines and was the highest of all engines produced by the BMW Group.
The second power source for the BMW i8 was a hybrid synchronous electric motor specially developed and produced by BMW Group for BMW i. The electric motor developed a maximum power output of 131 hp (96 kW) and produced its maximum torque of approximately 320 N⋅m (236 lbf⋅ft) when stationary. As with an electric motor, power is immediately available at startup and continues into higher load ranges. In addition to providing extra power to assist the gasoline engine during acceleration, the electric motor can also propel the vehicle by itself. Top speed in electric mode was approximately 120 km/h (75 mph), with a maximum range of 35 km (22 mi). Linear acceleration is maintained even at higher speeds, as the interaction between the two power sources effectively absorbs any interruption in energy flow during gear changes. The model-specific version of the high-voltage 7.2 lithium-ion battery had a liquid cooling system and could be recharged at a conventional household outlet, a BMW I Wallbox, or a public charging station. In the U.S., a full charge took about 3.5 hours from a conventional 120V, 12-amp home circuit or about 1.5 hours from a 240V Level 2 charger.
The driver could select several driving modes: SPORT, COMFORT and ECO PRO. Using the gear selector, the driver could either select position D for automatic gear selection or switch to SPORT mode. The SPORT mode offers manual gear selection and at the same time allows for very sporty driving and suspension settings. In SPORT mode, the combustion engine and electric motor provide additional performance, throttle response is quicker and the power of the electric motor is maximized. And to keep the battery fully charged, SPORT mode also activates maximum energy recovery during passing and braking, as the electric motor's generator function, which recharges the battery using kinetic energy, is switched to a more powerful setting. The driving experience control switch on the center console offered a choice of two settings. At startup, COMFORT mode was activated, offering a balance between sporty performance and fuel economy, with unlimited access to all comfort features. It is also possible to activate the ECO PRO mode, which on the BMW i8 as on other models, promotes an efficiency-optimized driving style. In this mode, the powertrain controller coordinates the cooperation between the gasoline engine and the electric motor for maximum fuel economy. In the event of deceleration, the intelligent energy management system automatically decides, depending on the driving situation and vehicle condition, whether to recover the braking energy or to coast with the powertrain disengaged. At the same time, ECO PRO mode also programmed electrical comfort functions such as air conditioning, seat heating and heated mirrors to operate with minimal energy consumption, but without compromising safety. The maximum range of the BMW i8 with a full tank of fuel and a fully charged battery was more than 500 km (310 mi) in COMFORT mode, and could be increased by up to 20 percent in ECO PRO mode. The BMW i8's ECO PRO mode could also be used in all-electric mode. The vehicle was then powered solely by the electric motor. Only if the battery charge fell below a certain level, or if the gas pedal was suddenly and intensively used (kick down), was the internal combustion engine automatically activated.
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