Power from gas: The new Audi A4 Avant g-tron

The A4 Avant g-tron is concurrently sporty, fit and intensely economical. The engine is formed on a new 2.0 TFSI featuring an advanced, rarely fit explosion routine grown by Audi. The turbocharged appetite plant produces 125 kW (170 hp). Maximum torque of 270 Nm (199.1 lb-ft) is accessible during approx. 1,650 rpm. The pistons and valves have been privately mutated for gas operation and concede for an optimal application ratio. An electronic controller reduces a high vigour of a gas issuing from a tank from as most as 200 bar to a operative vigour of 5 to 10 bar in a engine. This vigour control duty is achieved boldly and precisely in response to a appetite requested by a driver. The scold vigour is always benefaction in a gas line and during a injector valves – low vigour for fit pushing in a reduce speed range, and aloft vigour for some-more appetite and torque.

In a NEDC, a Audi A4 Avant g-tron consumes reduction than 4 kilograms CNG (compressed healthy gas) per 100 kilometers (8.8 lb), equivalent to patron fuel costs of roughly 4 euros (as of: Oct 2015). CO2 emissions are reduction than 100 grams per km (160.9 g/mile). The tank ability of 19 kilograms (41.9 lb) of gas allows for a operation of over 500 kilometers (310.7 mi). When a volume of gas remaining drops next approx. 0.6 kilograms (1.3 lb) – equivalent to a residual vigour of 10 bar – a control section switches to gasoline operation. The bi-fuel A4 Avant g-tron can cover an additional
450 kilometers (279.6 mi) in this mode. The intensity altogether operation is allied to that of a automobile with a TDI engine.

The filler necks for gas and gasoline are located underneath a common tank flap. After refueling, and whenever it is really cold, a engine is started with gasoline initially, afterwards switched over to healthy gas operation as fast as possible. Two displays in a instrument cluster keep a motorist present on a fill levels of a tanks. The motorist information complement shows a fuel expenditure in a active handling mode.

Audi installs a 4 cylindrical CNG tanks as a compress procedure in a behind finish of a Avant. They are optimized for a accessible space, and any is privately sized. Sheet steel shells with tensioning straps reason a cylinders and strengthen them opposite damage, such as curbs. The finish CNG tank module, that also includes a 25 liter (6.6 US gal) gasoline tank, is propitious to a physique during prolongation of a A4 Avant. The gangling circle good in a physique is eliminated. The battery also moves from a luggage cell to a engine compartment. The loading building is even with a loading lip, so charity a bone-fide luggage compartment.

The CNG tanks with an handling vigour of 200 bar during 15 degrees Celsius follow a Audi lightweight construction philosophy. Thanks to their innovative layout, they import 56 percent reduction than allied steel cylinders. Their middle covering is a gas-tight pattern of polyamide. The second layer, a combination circuitous of CO fiber-reinforced polymer (CFRP) and potion fiber-reinforced polymer (GFRP), provides for limit strength. The third covering is pristine GFRP and serves essentially as a visible investigation aid, branch chalky white where damaged. Before being commissioned in a car, any tank is tested during 300 bar during production. The tangible ripping vigour is most aloft still and distant exceeds a authorised requirements.

With Audi e-gas, a A4 Avant g-tron is CO2-neutral in operation. e-gas is a fake methane constructed from H2O and CO2 with a assistance of immature electricity in mixed power-to-gas plants. Audi operates a world’s initial industrial-scale power-to-gas plant in Werlte, though now also procures e-gas from other facilities. With power-to-gas technology, a code with a 4 rings is creation it probable to store additional renewable appetite – a profitable grant to a appetite transition. The association and a partners are intensively pushing a growth of several fake fuels famous as Audi e-fuels, including by means of new biological prolongation processes.

The motorist can buy fuel regulating a Audi e-gas refueling label informed from a Audi A3 Sportback g-tron, that serves as both a remuneration and balancing instrument. Based on a information eliminated during payment, Audi feeds e-gas equivalent to a volume of gas purchased by a patron behind into a healthy gas network. In this approach Audi achieves totally CO2-neutral mobility.

Fuel expenditure of a models named above:

Audi A4 Avant gtron:
This car is not nonetheless on sale. It does not nonetheless have form capitulation and is therefore not theme to Directive 1999/94/EC.

Audi A3 Sportback gtron:
CNG expenditure in kg/100 km: 3.6 – 3.3 (7.9 – 7.3 lb)**;
Combined fuel expenditure in l/100 km: 5.5 – 5.1** (42.8 – 46.1 US mpg);
Combined CO2 emissions in g/km (CNG): 98 – 89** (157.7 – 143.2 g/mi);
Combined CO2 emissions in g/km: 128 – 117** (206.0 – 188.3 g/mi)

** Fuel consumption, CO2 glimmer total and potency classes given in ranges count on a tire/wheel sets used.