ASM Diesel Engine InCylinder Simulation Package/ASM Gasoline Engine InCylinder Simulation Package

Real-time diesel and gasoline engine models with in-cylinder pressure and temperature simulation

• Open MATLAB^®/Simulink^® models
• In-cylinder pressure, temperature, and torque calculation
• Real-time simulation and offline simulation
• Simulation of gas exchange (e.g. variable valve train)

Application Areas
The ASM Diesel Engine InCylinder Simulation Package and the ASM Gasoline Engine InCylinder Simulation Package are open Simulink models for developing and testing advanced electronic control units (ECUs) that support engine management based on in-cylinder pressure and variable valve timing, for example. They are fully integrated into the dSPACE tool chain and typically used as the plant models on a dSPACE Simulator for real-time hardware-in-the-loop (HIL) testing. They are complete and independent engine models that support all the relevant phases of the model-based development process, from early controller design to testing in the laboratory.

Key Benefits
The models simulate in-cylinder pressure in real time by means of a zero-dimensional thermodynamic approach, supporting the development and testing of ECUs. The diesel combustion process simulation can handle multiple injection patterns such as pre-, main and post-injection. In the gasoline combustion process gas exchange simulation is related to the position and the lift of the intake and exhaust valve. The model implementation is open down to the Simulink block level, so you can easily add components or replace them with custom models to meet specific project requirements. The model’s parameters can be tuned while online simulations are performed.

Simulation Model Characteristics
The models perform torque generation by calculating the in-cylinder combustion process according to a phenomenological approach. The gas dynamical behavior of the airpath and the exhaust path is implemented as a single-zone system with the manifold pressure, temperature, and mass calculation. Intake and exhaust valves are modeled as isentropic orifices. To simulate the engine in an automotive system (car or truck), the engine models incorporate a basic longitudinal drivetrain model. Models for the environment and driver complement the virtual powertrain.

Offline and Online Simulation
The ASM engine in-cylinder models can be used in combination with real controllers in a hardwarein-the-loop environment (known as HIL or online mode) or they can be used for the offline simulation of a diesel engine in combination with software controller algorithms (PC or offline mode). The models support real-time code generation via Real-Time Workshop and dSPACE RTI for online simulation on a dSPACE real-time system.