Exhaust-gas turbochargers are a key technology to enhance performance, reduce fuel consumption, and lower exhaust emissions. When fitted to direct-injection diesel engines, they reduce fuel consumption by up to 25 percent compared with similar gasoline engine with duct injection. For this reason, they have taken over almost the entire market segment. The trend with gasoline engines is toward downsizing, that is to say, a reduction in cubic capacity for the same power output. This is achievable by turbocharging, since the high power-to-capacity ratio of these engines requires an increase in the air mass supplied to the engine. This is only attainable by supercharging. Inevitably, the number of turbocharged gasoline engines will undergo a significant rise worldwide.The power output of an internal combustion engine mainly depends on the air mass supplied to the combustion process and this is achieved by employing a turbocharger. It utilizes exhaust-gas energy to precompress the intake air and supply a greater air mass-and therefore more oxygen-to the engine, achieving greater efficiency in the combustion process.Exhaust-gas turbocharging permits an increase in maximum torque and maximum power output (while retaining constant work volume), and a rise in mean pressure, without requiring any mechanical drive output from the engine that normally occurs with mechanical supercharging, e.g. a compressor. This increase can be harnessed to fit a more powerful engine with approximately the same dimensions as the original engine. Alternatively-and the trend is pointing in this direction-it can be utilized to implement downsizing concepts that can lower fuel consumption and CO2 emissions without a tradeoff on power output.Features:
- High-speed compressor wheels:
- Provide greater balancing precision
- Optimized speed stability
- Reduce running noise
- Double piston rings on rotor shaft
- Reduce oil consumption and enhance protection against foreign particles
- Turbine housings made of high-tech materials
- Achieve greater thermal stability and longevity
- Functional process-controlled center housing
- Attain progressive balancing of the rotor shaft
- Enhance running performance
- Reduce abrasion
- Less noise emission
- Electron welded rotor shaft and wheels
As a leading global development partner for the automotive and engine industry, MAHLE offers unique systems competence in the areas of engine systems, filtration, electrics/mechatronics, and thermal management. The MAHLE Group ranks among the top three systems suppliers worldwide for mobile applications in these sectors.
In the original equipment industry, MAHLE provides technologically innovative solutions for automotive, commercial vehicle, machinery, and other industrial applications. The Aftermarket business unit also serves the independent parts market with MAHLE products in OE quality.
MAHLE has a local presence in all major world markets. In 2015, a total of 75,000 employees at over 170 production locations are expected to generate sales of EUR 11.5 billion. At 13 major research and development centers in Germany, Great Britain, the USA, Brazil, Japan, China, and India, more than 5,000 development engineers and technicians are working on forward-looking concepts, products and systems.