Title:
VEHICLE INTERNAL-COMBUSTION-ENGINE COOLING SYSTEM AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/119445
Kind Code:
A1
Abstract:
In a vehicle internal-combustion-engine cooling system according to the present invention, in a deceleration state of a vehicle and in an idle-stop state of an internal combustion engine, the percentage of the amount of cooling water made to circulate in a first path that includes a heater core and a radiator is increased, the percentage of the amount of cooling water made to circulate in a second path that does not include the heater core and the radiator is reduced, and the discharge flow rate of an electric water pump is increased in the deceleration state of the vehicle, and the electric water pump is maintained in an operating state during idle stop. Accordingly, reducing the temperature of a cylinder head during idle stop is facilitated, thus improving the fuel efficiency during acceleration from standstill.
Inventors:
TOYAMA YUICHI (JP)
MURAI ATSUSHI (JP)
SAKAGUCHI SHIGEYUKI (JP)
MURAI ATSUSHI (JP)
SAKAGUCHI SHIGEYUKI (JP)
Application Number:
PCT/JP2017/000132
Publication Date:
July 13, 2017
Filing Date:
January 05, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F01P7/16; F01P7/04; F01P7/14; F02D17/00
Foreign References:
| JP2006161745A | 2006-06-22 | |||
| JP2011122559A | 2011-06-23 | |||
| JP2015178824A | 2015-10-08 | |||
| JP2015172355A | 2015-10-01 | |||
| JP2011179460A | 2011-09-15 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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