Audi presented the new Audi SQ5 at the 2017 North American International Auto Show (NAIAS) in Detroit. The sportiest member of the Q5 model series embodies more than ever the emotional concept of the practical SUV with the latest technology. It’s turbocharged, 3.0 TFSI offers powerful performance combined with further enhanced efficiency.
The 3.0 TFSI
The Audi SQ5 has a 2,995 cc, V6 TFSI engine with an output of 260 kW (354 hp). The turbocharged, aluminum engine delivers a constant 500 Nm (368.8 lb-ft) of torque from 1,370 to 4,500 rpm. The sprint from zero to 100 km/h (62.1 mph) is completed in 5.4 seconds; top speed is an electronically governed 250 km/h (155.3 mph). In the NEDC, the new Audi SQ5 3.0 TFSI consumes just 8.3 liters of fuel per 100 kilometer (28.3 US mpg) – a CO2 equivalent of 189 grams per kilometer (304.2 g/mi). Compared with its predecessor, this is a reduction of 13 grams per kilometer (20.9 g/mi).
New combustion process: higher efficiency
A new combustion process developed by Audi makes the 3.0 TFSI particularly efficient. It is based on the so-called “B cycle” process in combination with high-pressure injectors centrally located in the combustion chambers.
With its artificially shortened compression phase, the B cycle enables an engine process with a significantly higher base compression ratio. Combined with a power stroke that, while normal, is longer relative to the compression stroke, this allows for more efficient combustion and increased engine efficiency.
2018 Audi SQ5 3.0 TFSI
Under part load, the Audi valvelift system enables a very short intake aperture duration of 130 degrees of camshaft angle coupled with the early closure of the intake valve. This shortens the intake phase. At higher loads, the system switches to a camshaft contour with a longer opening time and a larger valve stroke. The engine then operates with a normal compression ratio and maximum throughput.
Turbocharger: separate exhaust gas flows
The turbocharger, which replaces the mechanical compressor of the previous engine, operates according to the twin-scroll principle. The exhaust branches of the two cylinder banks run separately in the exhaust manifold and in the turbocharger housing, and only merge before the turbine wheel. This technology improves the flow characteristics for more spontaneous turbine response, and is key factor behind the early and powerful development of torque.
The turbocharger is located within the 90-degree V of the cylinder banks. Accordingly, the exhaust side is on the inner side of the cylinder heads and the air intake on the outer side. This arrangement enables compact construction and short gas flow paths with minimal flow losses, thus the 3.0 TFSI responds extremely spontaneously and directly.
Less weight: 14 kilograms (30.9 lb) less
The V6 TFSI engine weighs just 172 kilograms (379.2 lb) and thus 14 kilograms (30.9 lb) less than the previous supercharged engine. Made with an aluminum alloy using the complex sand casting process, the cylinder crankcase features integrated, thin-walled cylinder liners of gray cast iron. In combination with the newly developed rings for the aluminum pistons, this reduces friction.
Another efficiency module: innovative thermal management
Audi presented the new Audi SQ5 at the 2017 North American International Auto Show (NAIAS) in Detroit. The sportiest member of the Q5 model series embodies more than ever the emotional concept of the practical SUV with the latest technology. It's turbocharged, 3.0 TFSI offers powerful performance combined with further enhanced efficiency.
The 3.0 TFSI
The Audi SQ5 has a 2,995 cc, V6 TFSI engine with an output of 260 kW (354 hp). The turbocharged, aluminum engine delivers a constant 500 Nm (368.8 lb-ft) of torque from 1,370 to 4,500 rpm. The sprint from zero to 100 km/h (62.1 mph) is completed in 5.4 seconds; top speed is an electronically governed 250 km/h (155.3 mph). In the NEDC, the new Audi SQ5 3.0 TFSI consumes just 8.3 liters of fuel per 100 kilometer (28.3 US mpg) - a CO2 equivalent of 189 grams per kilometer (304.2 g/mi). Compared with its predecessor, this is a reduction of 13 grams per kilometer (20.9 g/mi).
New combustion process: higher efficiency
A new combustion process developed by Audi makes the 3.0 TFSI particularly efficient. It is based on the so-called "B cycle" process in combination with high-pressure injectors centrally located in the combustion chambers.
With its artificially shortened compression phase, the B cycle enables an engine process with a significantly higher base compression ratio. Combined with a power stroke that, while normal, is longer relative to the compression stroke, this allows for more efficient combustion and increased engine efficiency.
2018 Audi SQ5 3.0 TFSI
Under part load, the Audi valvelift system enables a very short intake aperture duration of 130 degrees of camshaft angle coupled with the early closure of the intake valve. This shortens the intake phase. At higher loads, the system switches to a camshaft contour with a longer opening time and a larger valve stroke. The engine then operates with a normal compression ratio and maximum throughput.
Turbocharger: separate exhaust gas flows
The turbocharger, which replaces the mechanical compressor of the previous engine, operates according to the twin-scroll principle. The exhaust branches of the two cylinder banks run separately in the exhaust manifold and in the turbocharger housing, and only merge before the turbine wheel. This technology improves the flow characteristics for more spontaneous turbine response, and is key factor behind the early and powerful development of torque.
The turbocharger is located within the 90-degree V of the cylinder banks. Accordingly, the exhaust side is on the inner side of the cylinder heads and the air intake on the outer side. This arrangement enables compact construction and short gas flow paths with minimal flow losses, thus the 3.0 TFSI responds extremely spontaneously and directly.
Less weight: 14 kilograms (30.9 lb) less
The V6 TFSI engine weighs just 172 kilograms (379.2 lb) and thus 14 kilograms (30.9 lb) less than the previous supercharged engine. Made with an aluminum alloy using the complex sand casting process, the cylinder crankcase features integrated, thin-walled cylinder liners of gray cast iron. In combination with the newly developed rings for the aluminum pistons, this reduces friction.
Another efficiency module: innovative thermal management
