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Preparing for CARTRONIC - Interface and New Strategies for Torque Coordination and Conversion in a Spark Ignition Engine-Management System
Technical Paper
2001-01-0268
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
A major trend in modern vehicle control is the increase of complexity and interaction of formerly autonomous systems. In order to manage the resulting network of more and more integrated (sub)systems Bosch has developed an open architecture called CARTRONIC for structuring the entire vehicle control system.
Structuring the system in functionally independent components improves modular software development and allows the integration of new elements such as integrated starter/generator and the implementation of advanced control concepts as drive train management. This approach leads to an open structure on a high level for the design of advanced vehicle control systems.
The paper describes the integration of the spark-ignition (SI) engine management system (EMS) into a CARTRONIC conform vehicle coordination requiring a new standard interface between the vehicle coordination and the EMS level.
The main variable in this interface is the torque demand, which must be realized by the engine within a specified time interval. A set of characteristics contains further information about the desired vehicle action e.g. predicted torque, driver's request and desired speed.
For the realization of an EMS compatible with the CARTRONIC interface the torque structure of the EMS must be modified. This means that torque demands independent of engine characteristics have to be processed on a vehicle coordination level while engine specific demands remain on the level of EMS coordination.
Separating the source of torque demands from the path of torque conversion opens ways to improve torque conversion strategies. A suitable approach for such strategy is the selection of the actuating path based upon the torque related time interval using a charge dynamics model.
The structure proposed in this paper defines the inter-face between vehicle coordination and a CARTRONIC compatible engine management system. Additionally, smart torque conversion strategies are introduced, which open up potential for improved driving comfort and further reductions in fuel consumption.
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Citation
Mencher, B., Jessen, H., Kaiser, L., and Gerhardt, J., "Preparing for CARTRONIC - Interface and New Strategies for Torque Coordination and Conversion in a Spark Ignition Engine-Management System," SAE Technical Paper 2001-01-0268, 2001, https://doi.org/10.4271/2001-01-0268.Also In
Electronic Engine Controls: Modeling, Controls, Obd and Neural Networks
Number: SP-1585; Published: 2001-03-05
Number: SP-1585; Published: 2001-03-05
References
- Gerhardt J. Hönninger H. Bischof H. 1998 A New Approach to Functional and Software Structure for Engine Management Systems - BOSCH ME7 1998 SAE International Congress and Exposition Detroit/U.S.A. 23.-26 02 1998
- Bertram T. Bitzer R. Mayer R. Volkart A. 1998 CARTRONIC - An Open Architecture for Networking the Control Systems of an Automobile 1998 SAE International Congress and Exposition Detroit/U.S.A. 23.-26 02 1998 SAE 980200
- Bertram T. Dominke R. P. Müller B. 1999 The safety-related aspect of CARTRONIC 1999 SAE International Congress and Exposition Detroit/U.S.A. 23.-26 02 1998
- Kallenbach R. Kind W. 2000 Integriertes Antriebsstrangmanagement für Fahrzeuge 12. Internationaler Kongress Motor & Umwelt - Engine & Environment Graz/Austria 07.-08 09 2000