Title:
ENGINE UNIT
Document Type and Number:
WIPO Patent Application WO/2018/212093
Kind Code:
A1
Abstract:
Provided is an intake pipe fuel injection-type four-stroke engine unit that can improve the startability of an engine 10 with which there are high-load areas TH and low-load areas TL among four strokes. This engine unit comprises a four-stroke engine body 10 having high-load areas TH and low-load areas TL among four strokes, a permanent magnet-type starter motor 30 that has a permanent magnet and causes a crankshaft 46 to rotate, and an ECU 32 that controls the permanent magnet-type starter motor 30. During the low-load areas TL, and also from the time a fuel injection device 54 injects fuel into an intake passage 33a until an intake valve 50 closes, the rotational speed of the permanent magnet-type starter motor 30 is controlled so that the increase in the rotational speed of the crankshaft 46 is minimized on the basis of the temperature of the four-stroke engine body 10 measured by an engine temperature sensor 28.
Inventors:
ITO YOSHIHITO (JP)
ITO DAIKI (JP)
IIDA MINORU (JP)
ITO DAIKI (JP)
IIDA MINORU (JP)
Application Number:
PCT/JP2018/018340
Publication Date:
November 22, 2018
Filing Date:
May 11, 2018
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD (JP)
International Classes:
F02D43/00; F02D13/02; F02D13/08; F02D29/02; F02D41/06; F02D45/00; F02N11/08; F02P5/15
Domestic Patent References:
| WO2015093576A1 | 2015-06-25 |
Foreign References:
| JP2002161754A | 2002-06-07 | |||
| JP2016046906A | 2016-04-04 | |||
| JPH11153075A | 1999-06-08 | |||
| JP2000282909A | 2000-10-10 | |||
| JP2007182855A | 2007-07-19 | |||
| JP2003343404A | 2003-12-03 |
Other References:
See also references of EP 3626956A4
Attorney, Agent or Firm:
SUZUKI Kazuaki et al. (JP)
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