25 years of Audi TDI technology milestones

Audi celebration 25 years of advertising its TDI engines this year and we feel you present the important milestones in its history!

The 197 years: the stress developed by the oil crisis
At Audi, the improvement of the TDI begins in the middle of year 1970. Through the pre-improvement, a group of 10 engineers Audi opts for multijet Course of action. Bosch provider develops an injection pump piston has axial and electronic handle generating a stress up to 900 bars. In this method, carriers are two springs open needle injectors on two levels of distinct race. This permits preinjecter low fuel amounts, which improves combustion and noise.

198: the two.five TDI
In 1989, Audi presented at the Frankfurt Motor Show a milestone of the Approach: the two.five TDI engine mounts in an Audi 100. The 5-cylinder with a cylinder of 461 cm? is a turbodiesel direct injection and completely electronic management – the initially TDI planet. At the time, no one knows it will let the diesel engine to win in the series in Europe and mark the starting of a new era. Displaying a energy of 88 kW (120 hp) and a torque of 265 Nm to 250 rev / min, the energy delivery sets the new reference face competitors. The Audi 100 two.five TDI reaches a top rated speed of nearly 200 km / h but consumes on typical, according to the common of the time, only five.7 liters of fuel per 100 kilometers. From 1994, the 5-cylinder related with a new pump radial piston, an oxidation catalyst and a recycling method of the exhaust gas develops 103 kilowatts (140 hp) in the Audi A6. A version of 85 kW (115 hp) is optionally accessible.

199: the 1.9 TDI compressor with variable geometry (VTG)
The TDI engines from Audi also go to the conquest of the typical category. In 1991, the Audi 80 is fitted the 1.9 TDI 4-cylinder with an output of 66 kW (90 hp) and a torque of 182 Nm. 4 years later, an enhanced variant of 81 kW (110 hp) following in the Audi A4. The added energy is specially the new turbocharger has adjustable blades of the exhaust side. The compressor has variable geometry permits a smooth and early deployment torque of 700 rev / min.

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199: The initially V6 TDI in the planet
In 1997, Audi is once more a pioneer with the initially V6 TDI in the planet. This time, innovation in the field of diesel engines for automobiles is to combine a V6 TDI and a cylinder head has 4 valves. The two.five-liter engine has a energy of 110 kW (150 hp) and a torque of 310 Nm. It is characterized by options such as turbulence and tangential ducts in the inlet and an injection pump radial piston capable of generating a stress up to 850 bars. The two.five TDI in its most recent version as of 132 kW (180 hp) is applied in the A4, A6 and A8.

199: the V8 TDI
A cylinder of 328 cm ?, 4 camshafts in head, 32 valves and two compressors variabl geometry: the V8 TDI, which group series of the Audi A8 due to the fact October 1999, is a higher-tech concentrate. Its crankcase is created of cast iron to vermicular graphite lightweight and very sturdy and the charge air and the recirculated exhaust gases are cooled by water. A facility has typical rail – at the time, an innovation from Audi – carry out the fuel injection at a stress of 350 bar. With 165 kW (225 hp) and a torque of 480 Nm, the V8 TDI is an engine operating normal and silent, it establishes a new record in a maximum speed of 242 km / h.

200: the 1.two TDI
In 2001, Audi once more rises the bar. The Audi A2 1.two TDI has an typical consumption of two.99 liters per 100 km (81 grams of CO2 per km). The aerodynamically aluminum physique is powered by a 3-roll with a 1.two liter cylinder, a energy of 45 kW (61 hp) and a torque of 140 Nm. The engine has two valves per cylinder is related with a variable geometry compressor and a injection injector pump offering a stress of 050 bars – Created technologies by Volkswagen group and introduced the prior year by Audi. To date, the A2 1.two TDI is the only auto has 5 doors of the planet to consume only 3 liters.

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200: the three. TDI
The three. TDI, which tends to make its debut in 2004, is the initially member of the new V-engines Audi getting an opening angle of 90 degrees, a gap of 90 millimeters amongst the cylinders and a chain drive at the back of the motor. Like all massive diesel engines Audi, the crankcase is realized graphite cast iron vermicular mild and really resistant. A filter diesel particles – a novelty at Audi – epure the exhaust gas.
Yet another novelty: the piezo-injectors on the net. They are capable to inject tiny amounts of fuel and realize a lot more injections on thanks to their openness and ultrafast closure. Thanks to them, the stress can be finely judged up to 600 bar max and combustion are performed in smooth, enabling quiet operation. The V6 TDI is accessible in 3 versions of 150 kW (204 hp), 165 kW (224 hp) and 171 kW (233 hp). It is applied in several models of the Audi variety. In 2009, the second generation is marketed.

200: the V12 TDI
The twelve-cylinder implemented in late 2008 in the Q7 is the culmination of the Audi TDI technologies. This is the most potent series of automobile diesel engine in the planet. It is characterized by an injection typical rail method by generating a stress of 000 bars and two compressor variable geometry. The opening angle of 60 degrees delivers great balancing of masses and hence a really normal operation. The V12 TDI with a displacement of six. liters issued 368 kilowatts (500 hp) and a torque of 000 Nm from 750 to 250 rev / min. Thanks to him, the massive SUV accelerates from to 100 km / h in five.five seconds, as a sports auto, and reaches a top rated speed restricted to 250 km / h in electronics.

200: the three. TDI clean diesel
Faced with increasingly extreme needs for Exhaust gas, specially in the United States, Audi reacts in 2009 by advertising the clean diesel technologies. The three. TDI clean diesel injection method presents a typical rail of a stress of 000 bar and new combustion chamber sensors. The fine vaporization of the fuel and its combustion precise assure of low gross emission. An SCR catalyst (selective catalytic reduction) reduces nitrogen oxides in the exhaust method. The additive is AdBlue aqueous base injected becomes in make contact with with the really hot exhaust gas into ammonia reacts with nitrogen oxides to type water and nitrogen.

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In 2013, a new set combines the two elements: the filter diesel particulate coating with a selective catalytic reduction. Right here, ceramic substrates – the aluminum titanate or silicon carbide – the filter walls make sure the conversion of the nitrogen oxides. A retention catalyst (ASC) for avoiding downstream ammonia releases molecules decompose the residual ammonia which may possibly be present at higher loads.