CONTROL METHOD AND APPARATUS FOR VARIABLE GEOMETRY TURBOCHARGER AND VEHICLE

WIPO Patent Application WO/2021/190224

A1

Disclosed is a control method for a variable geometry turbocharger. The method is applied to a vehicle, the vehicle comprising an engine which has a variable geometry turbocharger, and the variable geometry turbocharger comprising a nozzle ring. The method comprises: obtaining the current rotational speed and the target torque of the engine; determining the current inflection point opening degree according to the current rotational speed, with the current inflection point opening degree being the opening degree of the nozzle ring for the current rotational speed and allowing the supercharge pressure of the variable geometry turbocharger to reach the maximum value; determining the desired opening degree of the nozzle ring according to the current rotational speed and the target torque; determining the target opening degree of the nozzle ring according to the greater value of the current inflection point opening degree and the desired opening degree; and adjusting the opening degree of the nozzle ring to the target opening degree. The method can prevent a situation where the supercharge pressure cannot be provided due to the sudden rise of the turbine front-end pressure of the turbocharger, and effectively protect the turbocharger. A control device for a variable geometry turbocharger, and a vehicle are further disclosed.

WO/2007/031752	VARIABLE TURBOCHARGER APPARATUS WITH BYPASS MEANS FOR BYPASSING EXHAUST GASES
WO/2017/205082	CONNECTION VALVE FOR EXHAUST GAS TURBOCHARGERS WITH MULTI-FLOW TURBINES
WO/2016/057262	VARIABLE TURBINE GEOMETRY TURBOCHARGER WITH A FIXED VANE FLOW CONTROL DEVICE

LIU YUNHUI (CN)
YAN SHUANGHE (CN)
YANG JINPENG (CN)
TAN ZHENDONG (CN)
HUANG SONG (CN)
CHEN HAIYAN (CN)
HAN ZILIANG (CN)
ZHAO PUTIAN (CN)
HAN GUANGHUA (CN)
YANG ZHONGHUA (CN)
WANG YAN (CN)
GU YASONG (CN)
HU YUCHEN (CN)
GU LINGZHI (CN)
HOU WENHAO (CN)
GU JIANYI (CN)
FU SHUAIFEI (CN)
ZHANG ZHAO (CN)
DONG QINGQUAN (CN)
DUAN ZHENG (CN)
XIN SONGLING (CN)
SONG XINLAI (CN)
YU JIE (CN)

PCT/CN2021/077508

September 30, 2021

February 23, 2021

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GREAT WALL MOTOR CO LTD (CN)

F01D17/14; F02B37/24

CN101387236A	2009-03-18
CN101341317A	2009-01-07
CN108825362A	2018-11-16
KR20170025072A	2017-03-08
JP4706134B2	2011-06-22
JPH0886251A	1996-04-02
US20030121263A1	2003-07-03

BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)

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