POWER SYSTEM PROVIDED WITH MEDIUM PRESSURE EGR LOW-PRESSURE STAGE DRIVE HIERARCHICAL ELECTRIC TURBOCHARGER DEVICE

• Main Author: YANO TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2018
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To attain a power system provided with a turbocharger device, where boost pressure control and EGR control are independent of each other, energy efficiency is high, and responsiveness for control is high.SOLUTION: With combination of a low-pressure stage drive hierarchical electric turbocharger and a medium pressure EGR, a plurality of control means having different characteristics on boost pressure and EGR amount is controlled, thereby controlling the boost pressure and EGR amount independently, wherein the low-pressure stage drive hierarchical electric turbocharger comprises a low-pressure stage turbine compressor and a high-pressure stage turbine compressor, to which a motor generator is connected; and the medium pressure EGR has an inlet of an EGR path between a high-pressure stage turbine and a low-pressure stage turbine, and an outlet thereof between a low-pressure stage compressor and a high-pressure stage compressor.SELECTED DRAWING: Figure 2 【課題】過給圧制御とEGRの制御が独立して可能であり、エネルギー効率が高く、制御の応答性が高いターボチャージャー装置を装着した動力システムを実現すること。【解決手段】モータジェネレータを接続した低圧段タービン・コンプレッサと高圧段タービン・コンプレッサからなる低圧段駆動階層型電動ターボチャージャーと、EGRパスの入り口を高圧段タービンと低圧段タービンの間に、出口を低圧段コンプレッサと高圧段コンプレッサの間に有する中圧EGRを組み合わせて、過給圧とEGR量に対して異なる特性を持つ複数の制御手段を制御することによって過給圧とEGR量を独立して制御する。【選択図】 図２