초록 ▼

An altitude compensating turbocharger control system including a boost regulator 54 for modifying a wastegate signal as a function of turbocharger output pressure and ambient pressure. The regulator includes a housing 52 that mounts a valve assembly 60 including a controller 98 for controlling the c

An altitude compensating turbocharger control system including a boost regulator 54 for modifying a wastegate signal as a function of turbocharger output pressure and ambient pressure. The regulator includes a housing 52 that mounts a valve assembly 60 including a controller 98 for controlling the communication of an input chamber 94 with an output chamber 96 and the communication of the output chamber 96 with an ambient pressure port 82. The housing also mounts an aneroid capsule 62 and a force transmitting arm 70 for transferring and amplifying ambient pressure related forces generated by the aneroid capsule 62 to the controller. The pressure in the output chamber is a function of both input pressure and the atmospheric pressure sensed by the aneroid capsule and is communicated via a port 84 to a wastegate actuator 30 which opens and closes a wastegate valve 28. Changes in atmospheric pressure sensed by the aneroid capsule causes the controller to modify the pressure in the output chamber to compensate for a change in biasing force on a wastegate actuator diaphragm 34 that occurs as a result of changes in atmospheric pressure.

대표청구항 ▼

An altitude compensating turbocharger controller for an internal combustion engine, comprising: (a) a suport housing; (b) an aneroid bellows connected to said housing; (c) a control valve assembly having a pressure input for receiving a pressure signal indicative of an output pressure of a turbochar

An altitude compensating turbocharger controller for an internal combustion engine, comprising: (a) a suport housing; (b) an aneroid bellows connected to said housing; (c) a control valve assembly having a pressure input for receiving a pressure signal indicative of an output pressure of a turbocharger, a vent port connected to ambient air pressure, a pressure output port, and valving structure defining a differential pressure responsive means movable from a predetermined position to alter communication between said output port and one of said input and vent ports to change the output pressure, said valving structure acted upon by differential pressure forces whose magnitude varies depending on sensed changes in ambient atmospheric pressure and the input pressure; (d) a force transmitting lever pivotally supported by said housing and operatively connected to said aneroid bellows and said valving structure, said lever operative to transmit and amplify force between said aneroid bellows and said valving structure; (e) said force transmitting lever effective to transmit biasing forces generated by said bellows to said valving structure in response to sensed atmospheric pressure, said output pressure changing to produce a differential pressure force acting on said valving structure to oppose said bellows generated biasing force, said differential pressure force reacting against said bellows force via the force transmitting lever to limit the degree of extension and retraction of said bellows to incremental amounts from a predetermined degree of extension.