Generic Engine inputting the data of fuel consumption

I am working with

Generic Engine: Internal combustion engine with throttle and rotational inertia and time lag

Library: Simscape / Driveline / Engines & Motors

I am trying to match the fuel consumption data from the datasheet with the Engine block. The data sheet is attached below. But there are four options in the fuel consumption model.

1-Constant per revolution

2-Fuel consumption by speed and torque

3-Brake-specific fuel consumption by speed and torque

4-Brake specific fuel consumption by speed and brake mean effective pressure

1- What is the best option to use?

2- How to enter the fuel consumption data of the selected engine in the engine block?

[Brandon Jamos Cipriano]

Hi! I also want to do this. Maybe you could help me. Thanks

Answer 1

[Milan Bansal]

Hi Othman Alkandri,

I understand that you want to match the fuel consumption data from the datasheet with the "Generic Engine Block" but you are not sure which option to choose in the "Fuel consumption model" parameter.

Here's a brief overview of each option:

1. Constant per revolution: This assumes that fuel consumption is constant for each engine revolution regardless of the operating conditions.
2. Fuel consumption by speed and torque: This option allows you to specify fuel consumption as a function of both engine speed (RPM) and torque.
3. Brake-specific fuel consumption (BSFC) by speed and torque: BSFC is a measure of the fuel efficiency of an engine design with respect to its power output. It is typically given in units of grams per kilowatt-hour (g/kWh). This option requires a map of BSFC values across different engine speeds and torques.
4. Brake specific fuel consumption by speed and brake mean effective pressure (BMEP): This option is similar to the previous one but uses BMEP instead of torque. BMEP is an indicator of engine efficiency that normalizes the engine torque for displacement.

In the given datasheet, power values and speed is given, therefore, torques at different power values can be calculated by dividing power by speed. Hence, “Fuel consumption by speed and torque" can be used in this case.

Please refer to the following documentation link to learn more about "Generic Engine Block".

https://www.mathworks.com/help/sdl/ref/genericengine.html

Hope this helps!