Title:
HUNTING DETECTION DEVICE, AND HUNTING DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/138353
Kind Code:
A1
Abstract:
A hunting detection device of the present disclosure is for detecting hunting in an engine equipped with a carburetor. The hunting detection device comprises: an acquisition unit that is configured to acquire the engine speed and the outside air temperature which is measured by a temperature sensor; a detection unit that is configured to detect hunting if a speed fluctuation state in which the outside air temperature is equal to or below a first reference value is detected; and an opening degree controller that is configured to control the opening degree of a choke valve provided to an intake passage of the engine. If the detection unit detects hunting, the opening degree controller executes closing control to reduce the opening degree of the choke valve.
Inventors:
NARITA HIROYUKI (JP)
ISHIYAMA AKIHIRO (JP)
MAKITA KENTARO (JP)
ISHIYAMA AKIHIRO (JP)
MAKITA KENTARO (JP)
Application Number:
PCT/JP2021/046174
Publication Date:
June 30, 2022
Filing Date:
December 15, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND MEIKI ENGINES CO LTD (JP)
International Classes:
F02M1/10; F02D41/06
Foreign References:
| JP2012193717A | 2012-10-11 | |||
| JP2005083320A | 2005-03-31 | |||
| JP2007032500A | 2007-02-08 | |||
| JP2007162576A | 2007-06-28 | |||
| JPS6159859U | 1986-04-22 | |||
| JPS517339A | 1976-01-21 | |||
| US20130000586A1 | 2013-01-03 |
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (JP)
Download PDF: