Work Vehicle Hood DPF Extraction and Heat Exchanger Layout
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Solution Overview
Problem
The existing configurations of diesel engines in work vehicles, such as tractors, face challenges with the mounting of diesel particulate filters (DPFs) which lead to reduced exhaust gas temperature, increased engine size, and compromised maintenance and cooling efficiency, resulting in potential component failure and reduced operator comfort due to heat retention and noise propagation.
Innovation Solution
The configuration includes a forced induction device, intercooler, oil cooler, and condenser, with the intercooler and oil cooler positioned above the radiator, allowing for improved airflow and maintenance access, and a hood design that reduces noise and heat exposure to the operator, while the heat exchangers are arranged to optimize cooling efficiency and reduce pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the DPF is mounted close to the engine, then the exhaust gas temperature in the DPF is maintained at a high temperature, but the support structure becomes complex and shock proof performance deteriorates
Solution Approach 1:
The DPF is repositioned from a location close to the engine to a space above the engine formed by the hood, utilizing vertical space rather than horizontal proximity. This dimensional change allows the DPF to maintain exposure to hot exhaust gas through the hood opening while simplifying the support structure by mounting it to the hood rather than requiring complex engine-integrated mounting.
2Reliability
If the engine size is increased to accommodate the DPF, then the DPF can be mounted with proper support, but the engine compartment becomes overcrowded and maintenance access is deteriorated
Solution Approach 1:
The DPF is extracted from the engine compartment space and repositioned to the hood area above the engine. This extraction frees up engine compartment space for maintenance access while the DPF is mounted to the hood structure, maintaining reliable support without interfering with engine maintenance operations.
3Reliability
If the engine size is increased, then the DPF can be properly supported, but the cooling air flow is deteriorated and cooling effect is reduced
Solution Approach 1:
The DPF is extracted from the engine compartment and positioned in the hood space above the engine. This extraction restores proper cooling air flow paths through the engine compartment by removing the obstruction, while the DPF continues to receive sufficient thermal energy through exposure to exhaust gas and ambient heat from the engine area.
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 enhances the cooling efficiency, reduces the risk of component failure, improves maintenance accessibility, and enhances operator comfort by minimizing heat and noise exposure, while maintaining effective exhaust gas purification.
Implementation Method 1
The intercooler is configured to cool compressed air from the forced induction device
Implementation Method 2
The oil cooler is configured to cool lubricant
Implementation Method 3
The radiator is configured to supply a coolant to the engine
Implementation Method 4
The condenser is configured to cool a refrigerant
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A work vehicle of the present invention includes a hood 6, an engine 5, a radiator 235, an air cleaner 221, and a condenser 275. The hood 6 covers an engine compartment located on a front portion of a traveling body 2. The engine 5 is a drive source. The radiator 235 supplies a coolant to the engine 5. The air cleaner 221 takes in outside air and supplies the air to the engine 5. The condenser 275 cools a refrigerant. In front of the radiator 235, the air cleaner 221 and the condenser 275 are disposed one above the other. The condenser 275 is withdrawable in the left and right direction.