Down-sizing is very popular in engine design as it reduces fuel consumption while keeping the same power output as the bigger engine by using a turbocharger. A downsized engine uses a smaller cylinder and a higher boosting pressure to yield a higher cylinder pressure over a smaller displacement volume...
INTRODUCTION A synchroniser can be defined as a crucial internal shifting element present in manual, automated manual and dual clutch transmissions. Its objective is to match the circumferential speeds of parts to be connected in short periods of time with the application of minimal force, in the same way...
The effects of continuously variable valve timing (VVT) are relatively well known. This blog post carries out an investigation at part load condition (3000 RPM, 3 Bar BMEP) for a three-cylinder 1 Litre SI engine with VVT to analyse the benefit of VVT on fuel consumption. All experiments are...
With the ever increasing electrification of ICE (Internal Combustion Engine) ancillaries and sub-systems, holistic approaches to quantification of benefits is essential. Historically and even in present day, vehicle design is still siloed to an extent. Each department is concerned with the design of their own systems using boundary conditions...
As part of the 2018.3 release of the VeSyMA – Engines library, some new features and improvements have been implemented. One of the main ones is the rationalisation of the sub busses and of the bus signals. Until now, several busses were used throughout the library to pass signals...
In the Autumn release of the VeSyMA-Engines library, there are some new features included with regards to the air path (intake and exhaust) , the combustion modelling and the mean value engine model. An engine model is created with combined Mean Value Engine Model (MVEM) for air path (intake...
This blog post describes a procedure to debug a crank-angle resolved engine model (CAREM) in Dymola. It helps narrow down to the cause of the problem in case the engine runs but does not produce the expected results. A CAREM is a multi-domain (mechanics, fluids, thermal, electrical) model so...
In a previous blog post, Linearized mean value engine model-based idle control, a mean value air path model was presented. That model was used for an idle control application. In other applications a mean value air path model can be used as a pressure or mass flow rate source representing...
This blog post assists in the creation of a simple seat model in Dymola that will allow to study the head rest’s acceleration, very important criteria for driver comfort, during a Tip-in/Tip-out manoeuvre. The seat head rest’s acceleration is in most cases different from the vehicle chassis acceleration and has...
This blog post describes the modelling method for knock detection in a gasoline engine. The knock model is modelled based on an AnB correlation, where A, B and n are parameters that depend on fuel type. It is described by the Arrhenius equation, which is empirically derived and describes...
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