If you look at the EventEmitter emit method @ angular.io, it can only take a single parameter of type T
emit(value?: T)
Since only a single parameter is allowed, consider passing it as an object in emit method.
In the snippet below, make & name variables are holding their respective values:
this.addModel.emit({make: make, name: name});
//shorthand is below
this.addModel.emit({make, name});