Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer, specialized in the industrial robotics, 3D modeler and designer.
I have over 15 years work experience, designing, prototyping and launching different devices/systems across multiple industries.
I could help with your project.
This project require a much larger discussion.
(btw - you may see in my portfolio some car fresheners but simple type - like wunderbaun, so i know about scent dissipation, air flow direction, etc. i modified a gws air purifier to fit some other cartridges with better results).
Now about this project: is necessary to clarify in the firs place what kind of dispenser your client require: natural ventilation (so could be placed anywhere in the car) semi-forced ventilation - like those mounted in the car's air vents, cartridge type like on citroen - but this is one of the most difficult system, or self powered.
another subject is the class type (from the ordinary ones - like those bought in the gas stations) to the luxury one which should have a minimum degree of customization.
Another very important question is about your scent - viscosity level, chemical reactions with the materials of the dashboard, and of course the compatibility with the passengers of the car.
More details when you'll open the chat.
For any other questions, you may open a chat room here and we'll discuss about the details.
Regards
Bogdan