Title:
内燃機関
Document Type and Number:
Japanese Patent JP7332266
Kind Code:
B2
Abstract:
To provide a five-stroke internal combustion engine which is simple in a structure, and excellent in energy collection efficiency.SOLUTION: Two combustion cylinders 3, 4 and one auxiliary cylinder 5 which is sandwiched between the two combustion cylinders are serially arranged. Exhaust ports 21 of the combustion cylinder 3, 4 are shifted to a side of the auxiliary cylinder 5 in an area at an exhaust side with a longitudinal direction center line O1 sandwiched, and also, flow-in ports 22, 23 of the auxiliary cylinder 5 are shifted to sides of the combustion cylinder 3, 4 at the exhaust side with the longitudinal direction center line O1 sandwiched. The exhaust ports 21 and the flow-in ports 22, 23 which adjoin each other communicate with each other via a take-in passage 24. Exhaust ports 25, 26 of the auxiliary cylinder 5 are located in a point of a short-side center line O2. Since the ports 20, 21 ... can secure necessary areas, a pumping loss can be suppressed. Since the take-in passage 24 can be shortened, power collection efficiency can be improved by suppressing the temperature-lowering and the expansion of a combustion gas. Since each valve is driven by two pieces of camshafts, a structure can be simplified.SELECTED DRAWING: Figure 1
Inventors:
Hiroyuki Fujikawa
Tatsuya Ehara
Tatsuya Ehara
Application Number:
JP2020015063A
Publication Date:
August 23, 2023
Filing Date:
January 31, 2020
Export Citation:
Assignee:
Daihatsu Motor Co., Ltd.
International Classes:
F02B75/02; F01N5/00; F02B33/22; F02B75/18; F02B75/20
Foreign References:
| US20110303202 | ||||
| WO2017007357A1 |
Attorney, Agent or Firm:
Hiroyuki Nishi
Ryuichi Watanabe
Ryuichi Watanabe
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