Title:
内燃機関
Document Type and Number:
Japanese Patent JP6537271
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress leakage of a lubricant from a bearing portion of a low-speed exhaust turbosupercharger when operating a high-speed exhaust turbosupercharger included in a two-stage turbo engine to perform supercharging of intake air.SOLUTION: An internal combustion engine comprises: a low-speed exhaust turbosupercharger with a low-speed turbine and a low-speed compressor; a high-speed exhaust turbosupercharger with a high-speed turbine and a high-speed compressor; an exhaust bypass valve for opening and closing a bypass passage which bypasses the low-speed turbine; an intake bypass valve for opening and closing a bypass passage which bypasses the low-speed compressor; and a control device which performs control for closing, or reducing openings of, both the bypass valves in a low-rotation operation region to perform supercharging with the low-speed exhaust turbosupercharger, while opening, or increasing the openings of, both the bypass valves in a high-rotation operation region to perform supercharging with the high-speed exhaust turbosupercharger, as well as maintaining a number of rotation of the low-speed exhaust turbosupercharger at or near a predetermined number of rotation.SELECTED DRAWING: Figure 1
Inventors:
Takeshi Serizawa
Kiyotaka Wakatsu
Takuma Oshiba
Kiyotaka Wakatsu
Takuma Oshiba
Application Number:
JP2014266171A
Publication Date:
July 03, 2019
Filing Date:
December 26, 2014
Export Citation:
Assignee:
Daihatsu Motor Co., Ltd.
International Classes:
F02B37/12; F02B37/16; F02B37/18; F02B39/14
Domestic Patent References:
| JP63083424U | ||||
| JP3202636A | ||||
| JP2001221076A | ||||
| JP2010013963A |
Attorney, Agent or Firm:
Kazuhiro Akazawa
Takeshi Miyazawa
Takeshi Miyazawa