Tom
Yep, that's Pseudocydonia sinensis, Chinese quince. Pruning for flowers and fruit is still pretty much the same for flowering and fruiting quinces. You will get the most flowers on wood that grew the previous season, so most people prune heavily just after flowering time so they can enjoy the flowers indoors as cut stems or on the plant without upsetting next years flowering wood. They also bloom on older wood. As bonsai, of course you are going to be getting most of your flowers on older wood since you can't let the canopy keep moving out. This requires some judicious planning for branches. It is even worse for Punica granatum, Pomegranate, which only flowers on the tips of NEW wood.
Brent
EvergreenGardenworks.com
bonsai@pacific.net