Title:
SUPERCHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/105533
Kind Code:
A1
Abstract:
This supercharging system includes: a first supercharger (30) which includes a first variable nozzle mechanism (35) that adjusts a flow speed of an incoming exhaust gas by means of an opening degree; a second supercharger (40) which includes a second variable nozzle mechanism (40) that adjusts a flow speed of an incoming exhaust gas by means of an opening degree; and a control device (200) which switches a first supercharge mode, in which the air supercharged in the first supercharger is supplied to an engine (1), to a second supercharge mode, in which the air supercharged in the first and second superchargers (30, 40) is supplied to the engine (1). The control device (200) executes an auxiliary running operation that supplies the air supercharged by the second supercharger (40) to the first supercharger (30), while supplying the exhaust gas to the second supercharger (40) before the first supercharge mode is switched to the second supercharge mode, and controls the opening degree of the second variable nozzle mechanism (35) to be smaller than the opening degree of the first variable nozzle mechanism (40) (S106-S108), when the supercharge pressure of the second supercharger (40) reaches the supercharge pressure of the first supercharger (30) during the auxiliary running operation, and the mode is switched to the second supercharge mode (S114-S117) to start an auxiliary running operation.
Inventors:
KUSUNOKI MASAYUKI (JP)
Application Number:
PCT/JP2019/044647
Publication Date:
May 28, 2020
Filing Date:
November 14, 2019
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
F02B37/24; F02B37/00; F02B37/007; F02B37/013; F02D23/00
Foreign References:
| JP2008255902A | 2008-10-23 | |||
| JPH01257720A | 1989-10-13 | |||
| JP2005155356A | 2005-06-16 | |||
| JP2005098250A | 2005-04-14 | |||
| JP2010209845A | 2010-09-24 | |||
| JP2020002787A | 2020-01-09 |
Attorney, Agent or Firm:
SATO Tsutomu et al. (JP)
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