An engine system for a motor vehicle is provided. The engine system includes a first exhaust-gas turbine in a first turbocharger driven by exhaust gas from the engine, a second exhaust-gas turbine in a second turbocharger driven by exhaust gas from the engine, a bypass coupled upstream and downstrea
An engine system for a motor vehicle is provided. The engine system includes a first exhaust-gas turbine in a first turbocharger driven by exhaust gas from the engine, a second exhaust-gas turbine in a second turbocharger driven by exhaust gas from the engine, a bypass coupled upstream and downstream of the first exhaust-gas turbine, and a pneumatic charge pressure control device including a bypass valve positioned in the bypass and a charge pressure control valve pneumatically coupled to the bypass valve and an intake line downstream of a first compressor included in the first turbocharger, the pneumatic charge pressure control device further including an adaptation unit pneumatically coupled to the bypass valve and an exhaust line upstream of the second exhaust-gas turbine.
대표청구항▼
1. A motor vehicle comprising: an engine;a supply air tract;a throttle flap arranged in the supply air tract;an exhaust tract which comprises a first exhaust line and a second exhaust line;a first turbocharger including a first exhaust-gas turbine and a first compressor connected in torque-transmitt
1. A motor vehicle comprising: an engine;a supply air tract;a throttle flap arranged in the supply air tract;an exhaust tract which comprises a first exhaust line and a second exhaust line;a first turbocharger including a first exhaust-gas turbine and a first compressor connected in torque-transmitting fashion to the first exhaust-gas turbine;a second turbocharger which has a second exhaust-gas turbine and a second compressor connected in torque-transmitting fashion to the second exhaust-gas turbine, the first turbocharger operated on its own, or, at high loads, together with the second turbocharger;where the first exhaust-gas turbine is arranged in the first exhaust line and the second exhaust-gas turbine is arranged in the second exhaust line, and the compressors are arranged in the supply air tract, and where the exhaust-gas turbines and thus the compressors are configured to be driven by exhaust gas that is generated during operation of the engine to generate a charge pressure in the supply air tract;a bypass configured to conduct the exhaust gas past only the first exhaust-gas turbine;a bypass valve equipped in the bypass, such that at least a part of the exhaust gas is conducted through the bypass in a first configuration of the valve and block said bypass in a second configuration of the valve; anda charge-pressure control device, including a bypass control line pneumatically coupled to the first exhaust line, and an actuator connected to the bypass control line and configured to adjust the bypass valve, the charge-pressure control device configured to charge the bypass control line with a certain opening pressure when a predefined charge pressure prevails downstream of the throttle flap, the actuator configured to open the bypass valve, thereby opening up the bypass, when the opening pressure prevails; anda pneumatically actuated adaptation unit coupled to the bypass control line and configured to pneumatically reduce a pressure in the bypass control line, independent of the charge-pressure control device, responsive to a pressure change in the first or second exhaust line, to a closing pressure which is lower than the opening pressure, the actuator configured to close the bypass valve, thereby blocking the bypass, when the bypass control line is charged with closing pressure. 2. The motor vehicle of claim 1, where the adaptation unit is configured to generate the closing pressure in the bypass control line in the event of a predefined pressure drop in the supply air tract. 3. The motor vehicle of claim 1, where the adaptation unit is configured to generate the closing pressure in the bypass control line in the event of a predefined pressure drop in the first exhaust line. 4. The motor vehicle of claim 1, where the adaptation unit is configured to generate the closing pressure in the bypass control line in the event of a predefined pressure rise in the second exhaust line. 5. The motor vehicle of claim 1, wherein the adaptation unit is connected via an indicator control line to the supply air tract upstream of the throttle flap, or to the first exhaust line upstream of the first exhaust-gas turbine, or to the second exhaust line upstream of the second exhaust-gas turbine. 6. The motor vehicle of claim 1, where the motor vehicle is configured to operate the first turbocharger simultaneously with the second turbocharger, during the operation of the engine. 7. A method for controlling a motor vehicle having a first exhaust-gas turbine of a first turbocharger in a first exhaust line and a second exhaust-gas turbine of a second turbocharger in a second exhaust line, a bypass configured to conduct exhaust gas selectively past the first exhaust-gas turbine, and an adaptation unit attached to a bypass control line coupled to a bypass valve positioned in the bypass, the adaptation unit pneumatically coupled to one of the first exhaust line, the second exhaust line, and a supply air tract, the method comprising: reducing the pressure in the bypass control line through operation of the adaptation unit after one or more of a predefined pressure drop is pneumatically detected in the supply air tract or in the first exhaust line, and a predefined pressure rise is pneumatically detected in the second exhaust line, wherein the first turbocharger operates on its own, or, at high loads, together with the second turbocharger. 8. An engine system for a motor vehicle comprising: a first exhaust-gas turbine in a first turbocharger driven by exhaust gas from an engine;a second exhaust-gas turbine in a second turbocharger driven by exhaust gas from the engine, wherein the first turbocharger is operated on its own, or, at high loads, together with the second turbocharger;a bypass coupled upstream and downstream of only the first exhaust-gas turbine; anda pneumatic charge pressure control device including a bypass valve positioned in the bypass and a charge pressure control valve pneumatically coupled to the bypass valve and an intake line downstream of a first compressor included in the first turbocharger, the pneumatic charge pressure control device further including a pneumatically actuated adaptation unit coupled to the bypass valve and an exhaust line upstream of the second exhaust-gas turbine. 9. The engine system of claim 8, where the pneumatic charge pressure control device is configured to close the bypass valve through operation of the adaptation unit when a pressure in the exhaust line upstream of the second exhaust-gas turbine surpasses a threshold value. 10. The engine system of claim 8, where the pneumatic charge pressure control device is configured to close the bypass valve through operation of the adaptation unit when a pressure in the intake line downstream of the first compressor drops below a threshold pressure. 11. The engine system of claim 8, where the adaptation unit is coupled to an exhaust line upstream of the first exhaust-gas turbine. 12. The engine system of claim 11, where the pneumatic charge pressure control device is configured to close the bypass valve through operation of the adaptation unit when a pressure in the exhaust line upstream of the first exhaust-gas turbine drops below a threshold pressure. 13. The engine system of claim 8, where the first exhaust-gas turbine is arranged in parallel with the second exhaust-gas turbine.
Okimoto Haruo (Hiroshima JPX) Akagi Toshimichi (Hiroshima JPX) Tashima Seiji (Hiroshima JPX), Air and fuel supply control systems for internal combustion engines.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.