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(3)增压压力调节装置废气涡轮增压器(如图23所示)的增压压力与到达废气涡轮增压器涡轮处的废气气流有直接关系。无论是废气气流的速度还是质量都直接取决于发动机转速和发动机负荷。发动机管理系统通过废气旁通阀调节增压压力。废气旁通阀由真空执行机构操纵,这些执行机构由发动机管理系统通过电子气动压力转换器(EPDW)来控制。
(3) Boost Pressure Regulator The boost pressure of the exhaust gas turbocharger (shown in Figure 23) is directly related to the exhaust gas flow reaching the turbocharger turbine. Both the speed and the quality of the exhaust gas stream directly depend on the engine speed and the engine load. The engine management system regulates the boost pressure via the wastegate valve. The wastegate valve is operated by vacuum actuators controlled by the engine management system via an electro-pneumatic pressure transducer (EPDW).