Hybrid Vehicle Engine Room Layout for Wiring and Cooling
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Solution Overview
Problem
Hybrid working vehicles face increased manufacturing costs due to the need for a new design that shortens the wiring between storage and generator-motor while effectively cooling storage devices, as conventional frame structures are not suitable for hybrid systems, leading to inefficiencies in power transmission and cooling.
Innovation Solution
The hybrid working vehicle design includes a power unit with the engine, generator-motor, and main hydraulic pump arranged linearly or in parallel, with storage placed between a partition and a counterweight, utilizing a dedicated cooling system to reduce wiring length and enhance cooling efficiency by positioning storage near airflow from the cooling fan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If storage is positioned away from generator-motor in conventional arrangements, then ease of manufacture is improved, but wiring length increases causing electric power loss
Solution Approach 1:
The storage is positioned in the vertical direction below the generator-motor rather than horizontally adjacent, utilizing the vertical space within the engine room. This dimensional change allows the storage to be close to the generator-motor for short wiring while maintaining ease of manufacture by using the lower portion of the engine room space.
2Temperature
If dedicated cooling system is added for storage, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The cooling fan serves dual functions: cooling the radiator and cooling the storage simultaneously. The cooling system is designed so that the fan positioned for radiator cooling also generates airflow that reaches the storage, making the cooling system multi-functional and avoiding additional cooling devices.
3Length of stationary object
If storage is positioned in lower portion of engine room, then wiring length is reduced, but cooling efficiency may be compromised
Solution Approach 1:
The cooling fan acts as an intermediary that transfers cooling airflow from the radiator area to the storage. The fan creates a directed airflow path that carries cooled air from the radiator cooling zone to the storage location, enabling effective cooling without direct thermal contact or additional cooling infrastructure.
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 configuration reduces electric power loss in wiring, improves working efficiency, and effectively cools storage devices without compromising radiator efficiency, while allowing for integration with conventional vehicle arrangements to minimize manufacturing costs.
Implementation Method 1
positioning storage near airflow from the cooling fan
Implementation Method 2
a radiator for cooling the cooling liquid for the storage
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An engine room (35) is divided into a left room and a right room by a cooling unit (18). An intake chamber (36) is disposed at a left side and an engine and the like are disposed at a right side. A cooling heat sink (24) is provided on a side of the intake chamber (36), and a storage (26) and a controller (25) for controlling hybrid electronic devices are formed in this order in a cooling heat sink (24). Further, a cooling pump (27) for supplying cooling liquid to the cooling heat sink (24) is provided in the intake chamber (36). A radiator (31) for cooling the cooling liquid is provided in front of the cooling unit (18).