Audi A3 Sportback 30 g-tron - New generation with CNG drive

Audi A3 Sportback 30 g-tron - New generation with CNG drive

16.09.2020: Audi A3 Sportback 30 g-tron: CNG consumption in kg/100 km: 3.6 – 3.5; combined CO2 emissions in g/km (CNG): 99 – 96 Operation with natural gas or biomethane, range up to 495 kilometers 1.5 TFSI with 96 kW (131 PS), sophisticated effici


Audi A3 Sportback 30 g-tron: CNG consumption in kg/100 km: 3.6 – 3.5; combined CO2 emissions in g/km (CNG): 99 – 96




   
Operation with natural gas or biomethane, range up to 495 kilometers
    
   
1.5 TFSI with 96 kW (131 PS), sophisticated efficiency technologies
    
   
Low fuel costs and CO2 emissions  





Audi adds a new member to the A3 family: the A3 Sportback 30 g-tron1. Operation with natural gas or biomethane makes the compact model particularly economical and climate-friendly with very low emissions. Like all variants of the new A3 model series, it boasts a sporty design, a digital operating concept and generous standard equipment. Sales in Germany begin in fall 2020 at a base price of €30,705.88.



The first A3 Sportback g-tron introduced by Audi in 2014 already featured a sophisticated technology concept. The successor builds on that. Its 1.5 TFSI engine produces 96 kW (131 PS) and generates 200 Nm (147.5 lb-ft) of torque between 1,400 and 4,000 rpm1.Its turbocharger with variable turbine geometry makes optimal use of the exhaust gas energy for early and harmonious torque development. The Miller combustion process provides tremendous consumption advantages during normal driving. With its abbreviated compression phase and long expansion phase, it was designed specifically for operation at partial load.




Operation with the knock-resistant fuel CNG enables a higher 12.5:1 compression ratio compared with the conventional combustion process of the 1.5 TFSI 110 kW (150 PS) and also improves efficiency. The cylinder head, injection system, turbocharger and catalytic converter were modified accordingly for the CNG engine. Before the gas reaches the injector valves, an electronic pressure regulator reduces the pressure from as much as 200 bar, which can prevail in the tanks, to between 5 and 9 bar.



The CNG model accelerates from 0 to 100 km/h (62.1 mph) in 9.7 seconds on its way to a top speed of 211 km/h (131.1 mph). Average NEDC fuel consumption for the four-cylinder is just 3.6 – 3.5 kilograms CNG (Compressed Natural Gas) per 100 kilometers, corresponding to a CO2 equivalent of 99 – 96 grams per kilometer (159.3 – 154.5 g/mi). With full gas tanks, the car has an NEDC range of up to 495 (307.6 mi) kilometers and a WLTP range of up to 445 kilometers (276.5 mi). This is supplemented by the additional range offered by the reserve gasoline tank with a net usable volume of 9 liters (2.4 US gal) mounted in front of the rear axle. Power is transferred to the front wheels via the standard seven-speed S tronic.




The four-cylinder always starts in CNG mode, only injecting slight amounts of gasoline under rare operating conditions. If the pressure in the gas tanks drops below a certain threshold, which varies depending on the current driving state, the engine switches to gasoline mode. The driver does not notice this switch. The fuel level in the tanks and consumption in the respective operating mode are displayed in the digital instrument cluster. The two filler necks are placed under a common fuel flap.






Light and safe: the CNG tanks




Three CNG tanks arranged perpendicular to the direction of travel are located in the rear of the Audi A3 Sportback 30 g-tron. A narrow steel cylinder with a capacity of approximately 4 kilograms of gas is mounted in front of the gasoline tank. Two large tanks, each of which can hold approximately 7 kilograms of CNG, are located beneath the luggage compartment floor.



They are made of fiber-composite materials and, in keeping with Audi’s lightweight construction philosophy, each weighs just 26 kilograms (57.3 lb). The inner layer is a gas-tight polyamide vessel. The ultra high-strength outer shell comprises two layers: an inner layer of carbon fiber-reinforced polymer (CFRP) and an outer layer of glass fiber-reinforced polymer (GFRP). The GFRP layer also has a safety function: It turns a milky white if damaged. A cover likewise made of GFRP protects the tanks against stone impacts or other road influences.



Utmost care is taken during their manufacture. Before the tanks are mounted in the car, they are pressure tested at 300 bar, far above the operating pressure of 200 bar. The vessels withstand a burst pressure of 580 bar, which is also well above the 470 bar required by law. Crash tests requirements are also easily met.




Powerful advantages: lower costs, lower emissions



The Audi A3 Sportback 30 g-tron is also a leader when it comes to economy, in part because of the favorable tax rate on natural gas and biomethane in Germany until 2026. The emissions balance is similarly positive. Due to the fuel’s high hydrogen content, a CNG automobile emits approximately 20 percent less carbon dioxide than a comparable gasoline model.



There are currently some 850 CNG gas stations in Germany.





 More than half of them sell biomethane produced entirely from waste, and this number is increasing. With this fuel, driving is nearly climate-neutral. When the fuel is burned in the engine, it only releases as much CO2 as the biomass from which it was produced bound while growing.



The Four Rings brand is helping to further increase the share of sustainable methane in the gas mix by feeding Audi e¬gas into the natural gas network. The synthetic fuel is produced at the power-to-gas plant in Werlte from water and carbon dioxide using electricity generated by wind power. Audi sources the CO2 from an adjacent biogas plant that recycles agricultural waste. The power-to-gas plant in Emsland is both a research facility and production site that also serves to stabilize the power grid in light of the increasing share of fluctuating green electricity from wind and solar power generation.



Like all models in the series, the Audi A3 Sportback 30 g-tron combines very fun driving with everyday utility. Beneath its expressive exterior lie many technologies from the full-size class. They can be found in the operating concept and the infotainment, the headlights, the interior and the sporty balanced handling. Depending on the position of the rear seat backs, the luggage compartment has a volume of 280 to 1,100 liters (9.9 to 38.8 cu ft). The loading floor is flush with the loading edge.



The Audi A3 Sportback 30 g-tron comes standard with the following equipment: LED headlights, digital instrument cluster, 10.1-inch touch display, leather-covered multifunction steering wheel and the assistance systems Audi pre sense front, lane departure warning, swerve assist and turn assist.





 Options include matrix LED headlights with digital daytime running lights, three-zone automatic air conditioning, head-up display, sport seats with integrated head restraints, panoramic glass sunroof and adaptive cruise assist, which supports the driver with longitudinal and lateral guidance. Three exterior and three interior lines, which can be freely combined, provide for a high level of customization.



Sales of the Audi A3 Sportback 30 g-tron in Germany and other European countries begin in fall 2020. The base price in Germany is €30,705.88.




1. Combined CNG consumption in kg/100 km: 3.6 – 3.5; combined CO2 emissions in g/km (CNG): 99 – 96 (159.3 – 154.5 g/mi)

    




Julia Winkler - photos Volkswagen


    

Permanent-URL: http://www.automobilsport.com/audi-a3-sportback-30-g-tron-cng-drive---212694.html

16.09.2020 / MaP

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