Laboratory for reciprocating engines
Welcome to the homepage of the laboratory for reciprocating engines.
In the laboratory for reciprocating engines, students specializing in plant engineering and design learn how reciprocating engines work. In particular, combustion engines are examined and optimized with regard to performance, fuel consumption and emissions.
What are reciprocating engines?
Reciprocating engines are the largest group of power and work machines. Internal combustion engines in particular are the most widely used heat engines in the world. This is partly due to their flexibility, but also to the high efficiency of combustion engines. Combustion engines are used in power classes ranging from a few watts to several megawatts. There are combustion engines that achieve 54% efficiency. In terms of efficiency, the combustion engine is the best heat engine there is.
What happens in the lab?
In the laboratory, students learn about the structure, function and operating behavior of combustion engines. For this purpose, we have a modern single-cylinder research engine in which the most important parameters can be measured. It is also possible to adjust the design parameters of this engine during operation or during short measurement breaks. This allows the operating behavior to be optimized on the test bench.
The investigations in the laboratory are directly related to the content of the lecture on reciprocating engines. The topics that are discussed theoretically in the lecture can be "tried out" in the laboratory. In addition to the laboratory courses, students also have the opportunity to carry out projects as part of their studies. Laboratory experiments
- Disassembly and assembly of an internal combustion engine: Here, students should get to know the actual structure of the machine
- Partial load optimization of a petrol engine.
- Full load optimization of a petrol engine
special features
- Towing and braking operation by coupling with electric motor (Figure 1)
- Towing mode: combustion engine is towed by electric motor
- Braking mode: Electric motor is towed by the combustion engine and acts as a generator (supplying electricity to the power grid)
- Variabel: Quetschspalt und Verdichtungsverhältnis durch Einsetzen von Distanzblechen
- Änderung der Steuerzeiten durch Verdrehung oder Austausch der Nockenwelle
- Steuerung der Betriebsparameter des Prüfstandes durch frei programmierte Motorsteuerung Simulink (Studentische Abschlussarbeit)
- Alle Betriebsparameter voneinander entkoppelt und separat veränderlich
- Zündzeitpunkt
- Einspritzzeitpunkt
- Einspritzdauer
- Öffnungswinkel der Drosselklappe
Monitoring of the operating pressure by means of cylinder pressure indication (Figure 4) and other parameters
- Operating pressure, intake and exhaust temperature
- Oil pressure as well as oil and cooling water temperature
- Timing of ignition and injection signal
- Lambda
- Torque
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