Exporting the entire scope of a file in Node.js

I made a game engine that I can use on the server side as well, and I planed to run it with Node.js.

The engine is in its entirety packed into one file, and at the end, I export it like this:

module.exports = Irenic; //Irenic is just the name of the engine. This is actually an object housing most of the classes and functions.

But, what if I made some functions outside of the Irenic object? For example, I redefined setInterval and setTimeout functions to track how many timeouts/intervals are active, and now I relized that I wont be able to use them outside of the file the engine is in.

How can I export everything in a file? (I already tried module.exports = this;, but it didn't work. Exported an empty object.)

Edit 1: I'd like to be able to simply call() the functions in the file I include the engine in, not do something like exportedObj.call().