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1. (WO2017154106) SURGE AVOIDANCE CONTROL METHOD AND SURGE AVOIDANCE CONTROL DEVICE FOR EXHAUST TURBINE TURBOCHARGER

Pub. No.:    WO/2017/154106    International Application No.:    PCT/JP2016/057166
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Mar 09 00:59:59 CET 2016
IPC: F02B 37/12
F02B 39/16
Applicants: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
三菱重工エンジン&ターボチャージャ株式会社
Inventors: SASE, Ryo
佐瀬 遼
YAHATA, Naoki
八幡 直樹
Title: SURGE AVOIDANCE CONTROL METHOD AND SURGE AVOIDANCE CONTROL DEVICE FOR EXHAUST TURBINE TURBOCHARGER
Abstract:
A surge avoidance control method for an exhaust turbine turbocharger avoids surging in an exhaust turbine turbocharger having a turbine that rotates with exhaust gas from an engine and a compressor rotationally driven by the turbine by controlling the opening angle of an operating device, capable of adjusting the operating point of the compressor, between fully open and fully closed. The method is provided with: a surge detection step of determining at predetermined time intervals whether the operating point of the compressor is positioned in a surge operating region; a surge avoidance opening angle calculation step of calculating a surge avoidance opening angle of the operating device which is necessary for moving the operating point of the compressor, determined to be positioned in the surge operating region in the surge detection step, outside the surge operating region; a correction opening angle calculation step of calculating, on the basis of a rate of movement of the operating point of the compressor determined to be positioned in the surge operating region in the surge detection step, a correction opening angle of the operating device; and an opening angle instruction value calculation step of calculating, on the basis of the surge avoidance opening angle and the correction opening angle, an opening angle instruction value for the operating device.