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Cooling system for vehicle

A cooling system and vehicle technology, applied in engine cooling, liquid cooling, gear lubrication/cooling, etc., can solve performance damage and other problems, achieve the effect of improving cooling performance and suppressing rotation noise

Pending Publication Date: 2022-07-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, if the load of the power transmission device is limited in this way, for example, when the power transmission device is a driving force-related device such as a transmission, the vehicle related to the power transmission device, such as acceleration performance, drivability such as driving feeling, or fuel consumption, will deteriorate. The original performance of the

Method used

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  • Cooling system for vehicle
  • Cooling system for vehicle
  • Cooling system for vehicle

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Embodiment

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0045] figure 1 It is a schematic block diagram explaining the drive apparatus of the vehicle 10 provided with the cooling system 30 which is one Example of this invention. The vehicle 10 is an engine-driven vehicle having only the engine 14 as a driving prime mover. The output of the engine 14 is transmitted from the automatic transmission 16 to the differential device 18 , and is distributed from the differential device 18 to the left and right drive shafts 20L. , 20R are transmitted to the left and right drive wheels 22L, 22R. That is, the drive device of the vehicle 10 is of the transverse type, and the automatic transmission 16 is arranged adjacent to the engine 14 in the vehicle width direction. The engine 14 is an internal combustion engine such as a gasoline engine or a diesel engine. The automatic transmission 16 shifts the rotation of...

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Abstract

A cooling system for a vehicle suppresses a shift to load limit control by cooling a power transmission device before the temperature of the power transmission device reaches a limit temperature. According to the present invention, before the lubricating oil temperature (THoil) of an automatic transmission (power transmission device) reaches a limit temperature (THlim) (THlim > THoil > = THfan), a cooling fan is rotated to cool the automatic transmission, so that the shift to load limit control is suppressed, and the performance of the automatic transmission, such as drivability and oil consumption performance, is appropriately maintained. Furthermore, on the basis of the engine rotation speed (NE), a TM duty ratio (Dt) is determined such that the rotation speed of the cooling fan is higher when the temperature of the automatic transmission is high than when the temperature of the automatic transmission is low, and the rotation speed of the cooling fan is controlled in accordance with the TM duty ratio (Dt). Thus, the cooling performance of the automatic transmission can be improved by increasing the rotational speed of the cooling fan within a range in which noise performance due to engine sound and the like is allowed.

Description

technical field [0001] The present invention relates to a cooling system for a vehicle, and more particularly, to a cooling system having a load limiter that limits a load when the temperature of the power transmission device exceeds a predetermined limit temperature. Background technique [0002] There is known a cooling system for a vehicle, which includes: (a) a temperature detection device that detects a temperature associated with a power transmission device; and (b) an electronic control device that includes a load limiter that, when the temperature detected by the temperature detection device exceeds The load limiter limits the load of the power transmission device at a predetermined limit temperature. The device described in Patent Document 1 is an example thereof, and when the temperature (T / M oil temperature) of the transmission as the power transmission device is equal to or higher than a predetermined threshold value, high-load operation is prohibited [see paragr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04F16H61/02F01P3/20F01P5/02F01P5/10F01P7/08
CPCF16H57/0412F16H57/0413F16H57/0416F16H57/0475F16H61/02F01P3/20F01P5/02F01P5/10F01P7/08F16H57/0415F01P2060/045F01P3/12F01P7/048F01P2025/40F16H59/72F16H63/50F16H2063/508F01P5/04F16H2057/02047F01P11/08F01P7/044
Inventor 井上纯一伊井岛优人近藤贵裕
Owner TOYOTA JIDOSHA KK