The powertrain of modern vehicles is the main focus of further improvements in fuel efficiency and performance. The powertrain converts energy that is stored chemically in fuel to mechanical energy that is applied to the wheels of a vehicle. The way this is done is as decisive to fuel efficiency as vehicle air drag and vehicle weight. Since the end customer decides for size and mass choosing a certain class of vehicle, powertrain engineering is challenged to come up with innovative solutions for better fuel efficiency and performance of the vehicles in the market place. One focus of these activities is the component that actually converts the chemical energy into mechanical energy, the combustion engine. Numerous new concepts have been established and some are definitely finding their way into the market place, while the currently established concepts will be refined and continue to exist for quite some time. The next focus is the way that mechanical energy is transformed and transferred to the wheels. The torque/speed properties of combustion engines require transmissions providing different gear ratios for different vehicle speeds. Automatic transmissions on one side show room for further efficiency improvement due to the loss inherent to their principle of operation. On the other side there is efficiency improvement possible at the combustion engines by providing a higher ratio range. Performance requires low ratios while mileage requires high ratios for low highway RPM. Transmission concepts like CVT (continuously variable transmission), double-clutch transmission and higher gear stepped automatic transmission have been developed following these trends. The resulting variety of different engine and transmission concepts creates a challenge for the electronic control architecture, which has historically grown from less sophisticated engine control units to more and more sophisticated powertrain control unit. This paper presents a modular control architecture to resolve this challenge. Separated electronic control units that are physically integrated into the engine and into the transmission control both engine and transmission. This approach of mechatronic control has been realized for several new transmission concepts being currently brought into the market place on large scale. Additionally the paper describes the technologies required for mechatronic transmission modules (MTM).
Mechatronic transmission control - a key enabling technology for new transmission concepts
Mechatronische Übertragungsregelung - ein Schlüssel zur Nutzung der Technologie neuer Kraftübertragungskonzepte
2004
9 Seiten, 14 Bilder, 1 Tabelle
Conference paper
English
Kraftfahrzeug , Antriebstechnik , Kraftstoffverbrauch , elektronische Regelung , Mechatronik , CVT-Getriebe , Energieumwandlung , Wirkungsgrad , Drehzahl , Drehmoment , Kraftstoffeinspritzung , Common-Rail-Einspritzsystem , Dieselmotor , Otto-Motor , Benzindirekteinspritzung , elektronisches Bauelement , Abdichtung (Dichtung) , elektrischer Kontakt , Laserstrahlschweißen , Antriebsstrang
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