Abstract: A method for controlling an engine turbocharger having a wastegate control valve is provided where the turbocharger is controlled by an electronic controller which is capable of delivering a wastegate control signal to the wastegate control valve. A determination is made as to whether an engine speed falls within a predetermined speed range defined by a first predetermined speed and a second predetermined speed, where the second predetermined speed is higher than the first predetermined speed. A predetermined initializing wastegate control signal may be delivered to the wastegate control valve in response to the engine speed falling within the predetermined speed range. A determination is made as to whether an engine speed exceeds the second predetermined speed, and a determination is made as to whether an engine load falls within a predetermined load range defined by a first predetermined load and a second predetermined load, where the second predetermined load is greater than the first predetermined load.

Abstract: Air intake systems having filters are useful for removing airborne particles from the air flow. When two filters are used in two separate air systems, one of the filters could become restricted before the other and require more frequent service. The subject air intake arrangement includes a balance tube connected between a first air supply and a second air supply to balance the rate at which the filters become restricted. This arrangement of components will tend to draw more air through the cleaner filter until it is restricted the same degree as the other filter.