Bosch Motorsport Gasoline direct injection for use in racing vehicles

21st February 2011
Posted By : ES Admin
Bosch Motorsport Gasoline direct injection for use in racing vehicles
Bosch Motorsport is offering a new gasoline direct injection system for use in racing vehicles. With its engine control unit from the MS 5 product family and its HPI 5 high-pressure power stage unit, the refined system incorporates all the electronic components. It also incorporates the complete hydraulic system: the HDEV 5 high-pressure injection valves, and the HDP 5 high-pressure pump with an integrated demand control valve. “Bosch direct injection is the ideal basis for innovative engine designs,” says Klaus Böttcher, the director of Bosch Motorsport. Changes in engine specifications are now being discussed extensively in several racing series.
Electrically controlled HDEV 5 high-pressure solenoid valves with multihole technology typically use up to seven individual jets to generate a spraying pattern. Bosch Motorsport advises its customers on injection-pattern configuration and also offers individual jet configurations, in which the jet pattern is adapted to the specific geometrics of each engine’s combustion chamber. The HDP 5 high-pressure pump is particularly small and compact. It can be easily connected to the cylinder head and typically generates pressures of up to 200 bar in the fuel rail. The pump is driven by an additional cam on the camshaft. On request, Bosch Motorsport can supply its customers with a variety of cam profiles, which are configured based on the properties of the engine in question. The goal is to increase the system pressure in racing vehicles within the next few years.

The HPI 5 high-pressure power stage unit makes it possible to control injection very precisely. It uses a three-stage design, which has a separate boost, pick-up, and hold phase, and it uses high voltages and currents to boost the valves. The power stage unit also drives the flow control of the high-pressure pump. The strategy for the flow control of the pump was developed specifically for this application. It includes pre-control and closed-loop regulation.

The Bosch Motorsport gasoline direct injection system is based on products which Bosch produces large-scale in series and which are then specially adapted for motorsports. Thus, in every single component, Bosch Motorsport offers its customers expertise from one of the world's largest suppliers. Bosch Motorsport’s close collaboration with the Bosch series development teams makes it possible to design systems based on customer-specific requirements – systems in which all the components have been programmed to interact efficiently, have been ideally dovetailed, and have been tested.

Bosch electronic gasoline direct injection became an immediate success in 2001, when it was first used in the Audi R8 that won the Le Mans 24-hour race.

Bosch Motorsport is part of the Bosch subsidiary Bosch Engineering GmbH, an engineering services specialist with headquarters in Abstatt, near Heilbronn, Germany.

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