Discussion Overview
The discussion revolves around the search for transfer functions related to internal combustion engines, specifically focusing on a four-cylinder engine. Participants are interested in the dynamics and control aspects of these systems, including the relationships between various engine parameters such as air inlet, RPM, horsepower, and exhaust gas flux.
Discussion Character
- Exploratory
- Technical explanation
- Homework-related
- Debate/contested
Main Points Raised
- One participant requests transfer functions from the air inlet to RPM or horsepower, considering a constant ideal air/fuel ratio, and questions whether a transfer function for the air/fuel ratio is also needed.
- Another participant seeks clarification on the transfer function from RPM to exhaust gas flux, expressing uncertainty about whether RPM or horsepower is more relevant for this calculation.
- A suggestion is made to search for resources on the thermodynamics of internal combustion engines, with a link to a Google search provided.
- A participant mentions finding a book titled "Engine Modeling and Control" by Rolf Isermann, which may contain relevant transfer functions.
- Another participant describes their own challenge in obtaining a transfer function for a torque-controlling dynamometer setup and expresses confusion regarding PID control and transfer functions.
Areas of Agreement / Disagreement
Participants do not appear to reach a consensus on the specific transfer functions needed or the best approach to obtain them. Multiple competing views and uncertainties regarding the relationships between engine parameters remain evident.
Contextual Notes
Participants express varying levels of familiarity with control theory and the specific requirements for their projects, indicating potential limitations in their understanding of the necessary transfer functions.
Who May Find This Useful
This discussion may be useful for mechanical engineers, students, or researchers interested in the dynamics and control of internal combustion engines, particularly those seeking to understand transfer functions and their applications in engine modeling.