| 摘要 |
A vacuum regulator (10) for automotive vehicles of the type having a computer-controlled exhaust gas recirculation (EGR) system is disclosed. The regulator (10) controls the vacuum signal provided to the EGR valve in accordance with the current signal applied to the regulator (10) by the engine control computer. The vacuum regulator (10) includes a solenoid structure having a secondary air gap in the flux path of the solenoid at the opposite end of the pole piece (24) from the armature (30). The flux path across the secondary air gap is divided into a first fixed portion and a second adjustable portion that is set during calibration of the regulator (10). The sensitivity of the calibration process is, therefore, substantially reduced, thereby enabling more accurate setting with less chance of overshooting the desired set point. <IMAGE> |
