Working Vehicle Cooling System with Torque Converter Heat Exchange
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Solution Overview
Problem
Existing working vehicles face inefficiencies in cooling the engine, torque converter oil, and hydraulic oil, particularly during high-load running operations, as the oil cooler for hydraulic oil does not function effectively, leading to inadequate cooling and the need for a larger radiator.
Innovation Solution
Incorporating a hydraulic oil circulating pump to circulate hydraulic oil to an oil cooler during running operations, and a heat exchanger to exchange heat between torque converter oil and hydraulic oil, allowing both the radiator and oil cooler to radiate heat efficiently, while utilizing existing hydraulic pumps to avoid adding new components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the radiator size is increased to provide sufficient cooling during high load running operations, then the cooling effect is improved, but the device complexity and space occupation increase
Solution Approach 1:
The cooling system is segmented into multiple independent cooling paths: one for the engine (via radiator) and another for the torque converter oil (via oil cooler). This allows each cooling component to be optimized for its specific function rather than requiring one oversized radiator to handle all cooling needs.
Solution Approach 2:
Hydraulic oil serves as an intermediary cooling medium that transfers heat from the torque converter oil through the heat exchanger. The hydraulic oil circulates through the oil cooler to dissipate this heat, effectively mediating the heat transfer process and enabling efficient cooling without requiring a large radiator.
2Temperature
If a dedicated cooling system for torque converter oil is added, then the cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
The hydraulic oil circulating pump and oil cooler serve multiple functions: they cool the hydraulic oil during working operations and also cool the torque converter oil during running operations through the heat exchanger. This multi-functionality allows efficient cooling without adding dedicated single-purpose components.
Solution Approach 2:
The hydraulic system serves itself by using the hydraulic oil circulating pump and oil cooler to cool both the hydraulic oil and the torque converter oil. The system utilizes its own existing components rather than requiring external dedicated cooling systems for each fluid.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient cooling of engine, torque converter oil, and hydraulic oil during both running and working operations, reducing the need for a large radiator and minimizing component count by utilizing existing hydraulic pumps and optimizing heat transfer through the hydraulic oil's larger heat capacity.
Implementation Method 1
a heat exchanger for performing a heat exchange between a torque converter oil to be used for the torque converter and the hydraulic oil
Implementation Method 2
a radiator for radiating heat of engine cooling water for cooling the engine
Implementation Method 3
an oil cooler for radiating heat of the hydraulic oil
Data Source
AI summary
Provided is a working vehicle capable of efficiently cooling an engine, a torque converter oil and a hydraulic oil.There are provided an engine 11, a torque converter 12, a hydraulic working device 15 to be operated by a hydraulic oil 31, a radiator 16 for radiating heat of engine cooling water 32 for cooling the engine 11, an oil cooler 17 for radiating heat of the hydraulic oil 31, and a heat exchanger 19 for performing a heat exchange between a torque converter oil 33 to be used for the torque converter 12 and the hydraulic oil 31. The torque converter oil 33 is heat exchanged with the hydraulic oil 31. Therefore, heat of the torque converter oil 33 is radiated by the oil cooler 17 through the hydraulic oil 31. Also in a running operation, the heat can be radiated by both of the radiator 16 and the oil cooler 17, and the engine 11, the torque converter oil 33 and the hydraulic oil 31 can be cooled efficiently.