Bosch is supplying the gasoline direct injection system for the 2.0-litre turbo-charged engine of the new Volkswagen Passat. "The combination of direct injection and turbo supercharging turns the engine into a high torque, high power and low consumption speed machine," says Dr. Rolf Leonhard, Vice President Development, Gasoline Systems Division at Bosch. Gasoline direct injection generally improves the torque curve of supercharged engines over the complete speed range.
Acceleration when starting is much faster and maximum torque is available at low speeds. This increases the driving pleasure, provides for a regular power output of the engine and in addition lowers fuel consumption. The 2.0-litre turbo-charged engine of the Passat with the gasoline direct injection system from Bosch, develops147 kW and its high maximum torque of 280 Nm is available from a low speed of just 1,800 rpm. Aside from the Volkswagen Passat, the engine is also fitted to the Golf GTI, Audi A3 Sportback and A4.
The combination of direct injection and turbo charging serves as the future technological basis for downsizing concepts, which will allow for even greater fuel economy. In downsizing, smaller but more powerful engines with turbo-chargers are used instead of conventional naturally aspirated engines.
"If the piston displacement is reduced by one third, fuel consumption with direct injection can be lowered by 15 per cent", explains Leonhard.
Together with the gasoline direct injection for turbo-charged and naturally aspirated engines, consisting of injectors, engine management and sensors, Bosch also supplies Unit Injector Systems - sometimes called pump-nozzle units - for the Passat equipped with diesel engines, plus wiper systems, control units for the electrical system, ignition components and spark plugs. The Bosch subsidiary Blaupunkt provides CD car radio and the navigation system.
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