Handtmann Systemtechnik GmbHArthur-Handtmann-Str. 7/188400 Biberach www.handtmann.de

Lower consumption and CO2 output with better driving performance HSL® from Handtmann makes it possible. "Nothing replaces cylinder capacity" was the old adage when it came to engine power and performance. Today that rule is: "Nothing replaces cylinder capacity except for supercharged pressure". Engines with less cylinder capacity, additionally supported by a mechanical supercharger, run more efficiently with the same power. In following today's defining trends towards downsizing, environmental awareness and stricter exhaust gas regulations, Handtmann has developed a supercharger that sets its own trends in automobile engine construction.

Handtmann Systemtechnik, with headquarters in Biberach Germany, has taken on the familiar problems of a potential supercharger concept on its own initiative, successfully meeting the requirements of an ideal supercharger for future efficient engine concepts. The Handtmann scroll-type supercharger or HSL® (Handtmann Spirallader in German), is based on the spiral displacement principle and can be integrated into the existing belt level by means of electromagnetic coupling. The HSL® is a completely new product that was developed using ultramodern methods for calculating strength and flow. Use of improved materials and innovative manufacturing processes ensure that nothing stands in the way of future use in series production.

HSL® for almost every type of engineDespite downsizing, engine power does not need to be sacrificed, since the HSL® can be combined with almost every type of engine. Handtmann does this by individually adapting the specifications of the supercharger to the corresponding engine type to achieve optimum values for consumption, CO2 emission and power. The optimum combination for the HSL® is in the area of double supercharging. Significantly increased starting torque can be delivered even at idling speed and above, since greater volumetric efficiency is achieved at the lowest engine speeds. This eliminates weaknesses associated with starting. Another advantage is lower consumption and therefore less CO2 output with better driving performance. Due to the low moment of inertia, switching processes of the electromagnetic coupling do not have any negative effect on driving comfort. The HSL produces almost no vibrations in the flow of supercharged air during operation. This eliminates the need for cost-intensive measures to reduce noise.

As simple as it is efficient HSL®The operating principle is simple yet efficient: The supercharger can be turned off at a nearly constant speed or with a slight decrease in power to reduce mechanical loss. If more power is required and the driver presses the accelerator, the supercharger is automatically recoupled, thus increasing power. The high supercharging pressure that can be generated even at the lowest engine speeds provides great elasticity for the combustion engine. That eliminates the need for switching to a lower gear. Both fuel consumption and CO2 output are reduced compared to naturally aspirated engines or engines with simple supercharging and the same engine power.

Engine downsizing withsupercharger technology