ASM Gasoline Engine InCylinder

In-cylinder pressure, temperature, and torque calculation

ASM Gasoline Engine InCylinder is a real-time-capable gasoline engine model with in-cylinder pressure and temperature simulation.

  • Open MATLAB®/Simulink® model
  • Real-time simulation and offline simulation
  • Real-time engine model with in-cylinder pressure and temperature simulation 

Using models with physical precision to simulate combustion engines in real time; e.g. in-cylinder pressure, temperature, gas mass flows.

The tool is suitable to be used in safety-related development projects according to ISO 26262:2018 for any automotive safety integrity level (ASIL).

ASM Gasoline Engine InCylinder is an open Simulink model for developing and testing electronic control units (ECUs) with engine management based on the in-cylinder pressure. The model simulates in-cylinder pressure in real time by means of a zero-dimensional thermodynamic approach. The gasoline combustion process is reflected by considering ignition delay, combustion duration, and typical burn function trajectories. In the combustion process, gas exchange simulation is related to the lift of the intake and exhaust valves. The gas-dynamic behavior of the air path and exhaust path is implemented as a mean value system with manifold pressure, temperature, and mass calculation. The inlet and exhaust valves are modeled as isentropic orifices. They can handle variable valve timing (VVT), variable valve lift (VVL), and the simulation of engines without a camshaft. To simulate the engine within an automotive system (car or truck), the engine model incorporates a basic longitudinal drivetrain model. Models for the environment and driver complement the virtual powertrain.

Features at a Glance

  • Simulation of in-cylinder pressure and temperature in real time: e.g., in response to injection, ignition event or variable valve timing
  • Gasoline applications with up to 20 cylinders with direct or port injection and turbocharger for real-time simulation. Unlimited number of cylinders for offline simulation.
  • Up to 8 direct injections and 4 port injections per cylinder per cycle
  • Gasoline exhaust system, including dynamic three-way catalyst simulation with respect to oxygen storage capacity
  • Gas exchange simulation related to the lift of the intake and exhaust valves
  • Fuel injection systems: direct or port injection
  • Exhaust gas recirculation (EGR) of exhaust and fresh air with EGR cooler
  • Start/stop system support
  • Air path topology (e.g., V-engine or inline engine) configurable via parameters
  • „Simulation of parallel intake and exhaust air paths for V-type engine

  • Air system
  • Fuel system
  • Valve system
  • Piston engine
  • Turbocharger
  • Drivetrain (basic)
  • Vehicle dynamics (longitudinal)
  • Environment (basic)
  • Soft ECU

Feature Gasoline Basic Gasoline Diesel InCylinder Gasoline InCylinder Diesel
No. of cylinders Unlimited 20 20 12 12
EGR – Yes Yes Yes Yes
Map-based turbocharger Yes Yes Yes Yes Yes
Physical turbocharger – Yes Yes Yes Yes
Common rail system – Yes Yes Yes Yes
Pump nozzle – – Yes – –
Fuel injection Intake manifold Direct, intake manifold Direct Direct, intake manifold Direct
Wall film evaporation Yes Yes – – –
Combustion modes Homogeneous Homogeneous, stratified Diffusion Homogeneous Diffusion
Exhaust system Basic variant Basic variant DPF, DOC1) Basic variant DPF, DOC1)
Soft ECU, engine Yes Yes 2) Yes 2) Yes 2) Yes 2)
Combustion simulation Mean value Mean value Mean value Physical Physical
Valve simulation Mean value Mean value Mean value Physical Physical
1) DPF: diesel particulate filter, DOC: diesel oxidation catalyst
2) Torque-based

ModelDesk Graphical user interface for parameterization, management, and simulation ASM Turbocharger Model Real-time model for turbocharger simulation
  • ASM Combustion Engine Product Information, PDF, English, 6226 KB
Product Information Contact Information

Drive innovation forward. Always on the pulse of technology development.

Subscribe to our expert knowledge. Learn from our successful project examples. Keep up to date on simulation and validation. Subscribe to/manage dSPACE direct and aerospace & defense now.

Enable form call

At this point, an input form from Click Dimensions is integrated. This enables us to process your newsletter subscription. The form is currently hidden due to your privacy settings for our website.

External input form

By activating the input form, you consent to personal data being transmitted to Click Dimensions within the EU, in the USA, Canada or Australia. More on this in our privacy policy.