VOLVO 450 HP DRIVE-E POWERTRAIN CONCEPT 1000 2000 3000 4000 5000 6000 7000 Engine Speed - rpm 450 hp Volvo engine in a way that permits us to achieve all emission and real consumption values required for series production at a later point in time. The combustion system conforms to EURO 6c; the cylinder pressure level respects mechanical engine durability requirements, and even the exhaust gas temperature upstream of the turbine is in the normal range.” For the concept engine, the materials utilized were all cost-effective enough to be used in a series-production vehicle later. In the S60 demonstrator, AVL and Volvo employed Polestar Racing who fitted the vehicle with its performance Öhlins sports chassis, Brembo brakes and sports exhaust system. Producing 228 hp per liter of displacement (168 kW/l), the concept engine, developed in collaboration with Volvo, currently has the highest specific power output of any four-cylinder engine. “We are very happy with the cooperation and AVL’s achievement in this project. It pushed the boundaries of what is possible, and without compromising suitability for everyday use. The project has demonstrated very clearly that by using a turbocharged 2l four-cylinder engine paired with an e-compressor it is indeed possible to obtain the kind of top performing vehicle that previously required a V6 or V8 turbocharged engine, and that not only meets customer expectations, but goes beyond them” Michael Fleiss, Vice President of Powertrain Engineering at Volvo Cars says, summarizing the successful highperformance 1 3 F O C U S engine project. < ventional turbochargers with additional boosting pressure (500mbar) on the compressor side, increasing mass flow via the engine. By raising the voltage level from 12 to 48 volts, the e-compressor is extremely powerful, providing additional torque at up to approx. 3,500 rpm. At 1,500 rpm, 380 Nm of torque is already available; at 2,000 rpm, there is 420 Nm of torque. Up to 6,000 rpm, torque increases steadily to as much as 500 Nm,” says Paul Kapus, describing the high-performance engine’s sportive torque curve. All e-compressor functions are controlled by the AVL Rapid Prototyping control device (AVL RPEMS), which, in the demonstrator vehicle, operates alongside the conventional engine control unit. Fuel is fed by a dual fuel pump from Denso, working at 250 bar, which is around 50 bar higher than what is normally currently found in injection systems for gasoline engines. Paul Kapus: “Basically, we designed the concept for the > Power and brake mean effective pressure curve for the Volvo high-performance engine. Power - HP BMEP - bar 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 BMEP - bar Power - HP
Focus_01_2015_e
To see the actual publication please follow the link above