ASM Diesel Engine InCylinder

In-Cylinder Pressure, Temperature and Torque Simulation

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

Simulation Model Characteristics

The ASM Diesel Engine InCylinder Model is an open Simulink model for developing and testing electronic motor control units that evaluate the in-cylinder pressure. The model uses a zero-dimensional thermodynamic approach to simulate the in-cylinder pressure in real time. The diesel combustion process simulation can handle multiple injection patterns such as pre-, main- and post-injection. During the combustion process, the gas exchange simulation depends on the lift of the intake and exhaust valves. The gas dynamical behavior of the air path and the exhaust path is implemented as a mean value model with the manifold pressure, temperature, and mass calculation. Intake and exhaust valves are modeled as isentropic orifices. By default, the exhaust path has a diesel oxidation catalyst and a diesel particulate filter. 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.

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
  • Simulation of diesel engines with up to 20 cylinders with common-rail injector and turbocharger for real-time simulation
  • Up to 8 direct injections and 4 port injections per cylinder per cycle
  • Unlimited number of cylinders for offline simulation
  • Pattern for multiple injection, e.g., pre-, main-, and post-injection
  • Gas exchange simulation related to the lift of the intake and exhaust valves
  • Fuel injection systems: Common-rail direct injection
  • Exhaust gas recirculation (EGR) of exhaust and fresh air with EGR cooler
  • Start/stop system support
  • Diesel exhaust system including diesel oxidation catalyst (DOC) and diesel particulate filter (DPF)
  • 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
  • Exhaust gas aftertreatment
  • Turbocharger
  • Drivetrain (basic)
  • Vehicle dynamics (longitudinal)
  • Environment (basic)

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

  • ASM Combustion Engine Product Information, PDF, English, 6226 KB
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