Patent ID: 8371119

Claim:
A method of operating a machine, the machine including an internal combustion engine mounted on a chassis and having an intake manifold, an air intake system extending from an air inlet to the intake manifold and including a condensate collection location, a liquid system including a pump that is mechanically coupled to the internal combustion engine, and a drain valve positioned in the air intake system at the condensate collection location and including a valve member, the method comprising the steps of: running the internal combustion engine, wherein the running step includes: pressurizing a liquid within the liquid system; exposing a closing surface of the valve member to the pressurized liquid; moving the valve member to a closed position; and collecting condensate at the condensate collection location; and stopping the internal combustion engine, wherein the stopping step includes: bringing the liquid to atmospheric pressure; moving the valve member to an open position; and draining condensate from the condensate collection location through a discharge opening in the air intake system.