Title:
MULTISTAGE TURBO SUPERCHARGER SYSTEM
Document Type and Number:
Japanese Patent JP2018184902
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a multistage turbo supercharger system capable of avoiding generation of a high pressure stage side surge in the case of sudden speed reduction and/or sudden load decrease (cutoff) of an engine.SOLUTION: The present invention relates to a multistage turbo supercharger system in which a small-sized side high pressure stage turbo supercharger 50 and a large-sized side low pressure stage turbo supercharger 60 are connected in series from the side of an engine body 10. The multistage turbo supercharger system comprises: a low pressure stage exhaust bypass path 33 bypassing a low pressure stage turbine 61 of the low pressure stage turbo supercharger 60; a low pressure stage waste gate valve WG2 opening/closing the low pressure stage exhaust bypass path 33; and high pressure stage side surge avoiding means 90 by which, in a case where an actuation condition that a suction pressure P1 at an upstream side of a high pressure stage compressor 52 of the high pressure stage turbo supercharger 50 is higher than a suction pressure P2 at a downstream side of the high pressure stage compressor 52 is satisfied, the low pressure stage waste gate valve WG2 is opened.SELECTED DRAWING: Figure 2
Inventors:
YOSHIOKA TSUGIO
Application Number:
JP2017087451A
Publication Date:
November 22, 2018
Filing Date:
April 26, 2017
Export Citation:
Assignee:
YANMAR CO LTD
International Classes:
F02B37/18; F02B37/00
Domestic Patent References:
| JP2015108329A | 2015-06-11 | |||
| JPH01160126U | 1989-11-07 | |||
| JPS62162346U | 1987-10-15 | |||
| JP2016125366A | 2016-07-11 | |||
| JPH0197039U | 1989-06-28 | |||
| JPS60164631U | 1985-11-01 | |||
| JP2009270470A | 2009-11-19 | |||
| JPS4964708A | 1974-06-22 |
Foreign References:
| EP1927739A1 | 2008-06-04 | |||
| WO2015083611A1 | 2015-06-11 | |||
| US20160265468A1 | 2016-09-15 | |||
| US20130211693A1 | 2013-08-15 |
Attorney, Agent or Firm:
Masahiro Miyaji