US-20260124905-A1 - COOLING SYSTEM AND VEHICLE

US20260124905A1US 20260124905 A1US20260124905 A1US 20260124905A1US-20260124905-A1

Abstract

A cooling system for a coolant, includes: a radiator with a core part; a fan section; a shutter section; a first temperature sensor configured to detect a temperature of the coolant; and a controller configured to, based on the first detection temperature detected by the first temperature sensor. The controller is configured to switch between: a first mode in which, when the first detection temperature is a first temperature or below, the controller rotates a first fan and stops rotation of a second fan in a state that the controller opens a first shutter and closes a second shutter; and a second mode in which, when the first detection temperature is a second temperature or below, the second temperature being greater than the first temperature, the controller rotates the first and second fans in a state that the controller opens the first and second shutters.

Inventors

Hitoshi Aizono

Assignees

ISUZU MOTORS LIMITED

Dates

Publication Date: 20260507
Application Date: 20251010
Priority Date: 20241106

Claims (5)

1 . A cooling system for a coolant, comprising: a radiator including a core part through which air is provided from a front surface side to a back surface side, the core part being virtually partitioned into a first region and a second region along a flow direction in which a coolant is flown, the first region being on a side closer to an upstream side and functioning as an inlet of the coolant which has passed through a heat source, the second region being on a side closer to a downstream side than the upstream side and functioning as an outlet of the coolant; a fan section provided on the back surface side of the core part, the fan section including a first fan facing the first region and a second fan facing the second region; a shutter section provided on the front surface side or the back surface side of the core part, or a rear side of the fan section, the shutter section including: a first shutter facing the first region and configured to be opened and closed for the first region, a second shutter facing the second region and configured to be opened and closed for the second region; a fan shroud surrounding an outer periphery of the first fan and an outer periphery of the second fan at the back surface side of the core part, and partitioning the first region and the second region at the back surface side of the core part; a first temperature sensor configured to detect, as a first detection temperature, a temperature of the coolant at a predetermined position on a side closer to the outlet of the coolant; and a controller configured to, based on the first detection temperature detected by the first temperature sensor, independently control the first fan and the second fan of the fan section, and independently control the first shutter and the second shutter of the shutter section, wherein: the controller is configured to switch between: a first mode in which, when the first detection temperature is a first temperature or below, the controller is configured to rotate the first fan and stop rotation of the second fan in a state that the controller is configured to open the first shutter and close the second shutter; and a second mode in which, when the first detection temperature is a second temperature or below, the second temperature being greater than the first temperature, the controller is configured to rotate the first fan and the second fan in a state that the controller is configured to open the first shutter and the second shutter.
2 . The cooling system according to claim 1 , wherein the fan shroud includes: a first cylindrical portion in a cylindrical shape surrounding the outer periphery of the first fan and extending along an outer edge of the back surface of the first region of the core part or a neighborhood thereof; and a second cylindrical portion in a cylindrical shape surrounding the outer periphery of the second fan and extending along an outer edge of the back surface of the second region of the core part or a neighborhood thereof, to prevent an airflow to and from the first cylindrical portion at the back surface of the core part.
3 . The cooling system according to claim 1 , wherein in the second mode, the controller is configured to control a rotational frequency of the first fan to be equal to or greater than a rotational frequency of the second fan.
4 . The cooling system according to claim 1 , further comprising: a second temperature sensor configured to detect, as a second detection temperature, a temperature of the coolant at a predetermined position on a side closer to the inlet of the coolant to the radiator, wherein the controller is configured to switch between: the first mode when the first detection temperature is the first temperature or below and a difference between the first detection temperature and the second detection temperature falls within a predetermined temperature range; and the second mode when the first detection temperature is the first temperature or below and the difference between the first detection temperature and the second detection temperature exceeds the predetermined temperature range.
5 . A vehicle, comprising: the cooling system according to claim 1 ; a grille provided at a front section of the vehicle and functioning as an air intake port configured to take the air into the core part of the radiator during traveling of the vehicle; and the heat source provided at a rear side of the cooling apparatus.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2024-194264, filed November 6, 2024, the entire contents of which are incorporated herein by reference. FIELD The present invention relates to a cooling system and a vehicle. BACKGROUND A coolant cooling apparatus is disclosed in, for example, Jpn. Pat. Appln. KOKAI Publication No. 2018-043554, in which a plurality of fans disposed at the back of a radiator are simultaneously rotated to forcibly cool a suitably wide area of a core part (radiator core) of the radiator, thereby cooling a coolant (cooling fluid). In the case of using such a cooling system in which a plurality of fans are simultaneously rotated at the same rotational frequency, there may be a difference in rotational frequency or wind velocity between the fans. SUMMARY According to an aspect of the invention, a cooling system for a coolant, includes: a radiator including a core part through which air is provided from a front surface side to a back surface side, the core part being virtually partitioned into a first region and a second region along a flow direction in which a coolant is flown, the first region being on a side closer to an upstream side and functioning as an inlet of the coolant which has passed through a heat source, the second region being on a side closer to a downstream side than the upstream side and functioning as an outlet of the coolant; a fan section provided on the back surface side of the core part, the fan section including a first fan facing the first region and a second fan facing the second region; a shutter section provided on the front surface side or the back surface side of the core part, or a rear side of the fan section, the shutter section including: a first shutter facing the first region and configured to be opened and closed for the first region, a second shutter facing the second region and configured to be opened and closed for the second region; a fan shroud surrounding an outer periphery of the first fan and an outer periphery of the second fan at the back surface side of the core part, and partitioning the first region and the second region at the back surface side of the core part; a first temperature sensor configured to detect, as a first detection temperature, a temperature of the coolant at a predetermined position on a side closer to the outlet of the coolant; and a controller configured to, based on the first detection temperature detected by the first temperature sensor, independently control the first fan and the second fan of the fan section, and independently control the first shutter and the second shutter of the shutter section. The controller is configured to switch between: a first mode in which, when the first detection temperature is a first temperature or below, the controller is configured to rotate the first fan and stop rotation of the second fan in a state that the controller is configured to open the first shutter and close the second shutter; and a second mode in which, when the first detection temperature is a second temperature or below, the second temperature being greater than the first temperature, the controller is configured to rotate the first fan and the second fan in a state that the controller is configured to open the first shutter and the second shutter. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a part of a front section of a vehicle according to a first embodiment. FIG. 2 is a schematic diagram showing a cooling apparatus as viewed from a direction along line II-II of FIG. 1. FIG. 3 is a schematic block diagram related to cooling of a heat source of the vehicle according to the first embodiment. FIG. 4 is a flowchart related to a coolant cooling process using a cooling apparatus according to the first embodiment. FIG. 5 is a schematic block diagram related to cooling of a heat source of a vehicle according to a first modification of the first embodiment. FIG. 6 is a flowchart related to a coolant cooling process using a cooling apparatus shown in FIG. 5. FIG. 7 is a schematic diagram showing a part of a front section of a vehicle according to a second modification of the first embodiment. FIG. 8 is a schematic diagram showing a part of a front section of a vehicle according to a second embodiment. FIG. 9 is a schematic diagram showing a part of a front section of a vehicle according to a third embodiment. FIG. 10 is a schematic diagram showing a part of a front section of a vehicle according to a fourth embodiment. DETAILED DESCRIPTION A vehicle 10 including a cooling system 22 for cooling a coolant (a cooling fluid) which has passed through a heat source 12 will be described with reference to the accompanying drawings. First Embodiment A vehicle 10 including a cooling system 22 for a coolant (cooling fluid) according to a first embodiment will be described with reference to FIGS. 1 to 4