| 摘要 |
<p>@ 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 (54) 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 (52) 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 (98). The pressure in the output chamber (96) is a function of both input pressure and the atmospheric pressure sensed by the aneroid capsule (62) 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 (62) causes the controller (98) to modify the pressure in the output chamber (96) to compensate for a change in biasing force on a wastegate actuator diaphragm (34) that occurs as a result of changes in atmospheric pressure.</p> |
