Title:
COOLING WATER TEMPERATURE CONTROL SYSTEM FOR VEHICLE
Document Type and Number:
Japanese Patent JP3555269
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To realize a cooling water temperature control system for a vehicle capable of performing heat insulation by collecting cooling water of higher temperature from an engine to a heat insulating vessel after the engine is stopped.
SOLUTION: A cooling water temperature Tw after stopping an engine is detected by a water temperature sensor (step S3), from a temperature difference between this water temperature Tw and a water temperature Tw-1 detected in the preceding time (one time before), a temperature rise amount ΔTw is calculated (step S4), based on this temperature rise amount ΔTw, a cooling water temperature after stopping the engine is decided for whether leading or not to almost the highest temperature (step S5). Concretely, the temperature rise amount ΔTw is compared with a preset temperature rise amount ΔT, in the case of ΔTw>ΔT, a temperature rise is large still in rising of the water temperature, cooling water is not collected (step S9). On the other hand, in the case of ΔTw≤ΔT, the temperature rise amount is small, by obtaining about here almost the highest temperature, collecting cooling water is executed by operating an electric motor-driven pump (step S7).
More Like This:
Inventors:
Suzuki, Kazuki
Yamanaka, Yasutoshi
Yamanaka, Yasutoshi
Application Number:
JP1995000222821
Publication Date:
May 21, 2004
Filing Date:
August 31, 1995
Export Citation:
Assignee:
DENSO CORP
International Classes:
F01P3/20; F01P7/16; F01P11/20; F02N19/10; F04D13/02; F04D15/02; F01P5/10; F01P5/12; F01P7/14; F01P3/20; F01P7/14; F01P11/14; F02N19/00; F04D13/02; F04D15/02; F01P5/00; (IPC1-7): F02N17/06; F01P3/20; F01P7/16; F01P11/20