Title:
SUPERCHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/158074
Kind Code:
A1
Abstract:
This supercharging system comprises: primary and secondary superchargers (30, 40) including turbines (32, 42) driven by exhaust discharged form an engine, variable nozzle mechanisms (35, 45) that via the degrees of opening thereof adjust the flow rate of exhaust flowing into the turbines (32, 42), and compressors (31, 41) that supercharge air taken into the engine (1); a control device (200) that switches between a single supercharging mode in which air supercharged in the primary supercharger (30) is supplied and a twin supercharging mode in which air supercharged in the primary and secondary superchargers (30, 40) is supplied; and a memory that stores data indicating a map indicating the characteristics of the compressors (31, 41). The map includes a first axis for the amount of air taken in and a second axis for a pressure ratio of discharge pressure to intake pressure. When the control device (200) as switched to twin supercharging mode, the control devices switches to single supercharging mode when an operating point identified in the map by the pressure ratio and the amount of air taken in falls below a switch line on the map (S115, 117).
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Inventors:
OZEKI TOMOHITO (JP)
Application Number:
PCT/JP2019/041812
Publication Date:
August 06, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
F02B37/00; F02B37/007; F02B37/12; F02B37/24
Foreign References:
| JP2010209748A | 2010-09-24 | |||
| JP2013019306A | 2013-01-31 | |||
| JPS6287617A | 1987-04-22 | |||
| JP2017072042A | 2017-04-13 | |||
| US20060021347A1 | 2006-02-02 |
Attorney, Agent or Firm:
SATO Tsutomu et al. (JP)
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