Utility Vehicle Engine Cooling With Front Radiator and Rear Blower

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Solution Overview

Problem

Utility vehicles with engines in the rear part of the body face inefficiencies in cooling due to heat accumulation from the engine and auxiliaries, such as the exhaust muffler, which are not effectively managed by existing radiator systems.

Innovation Solution

The utility vehicle employs a radiator in the front part of the vehicle to improve the cooling system by incorporating a radiator in the front part of the vehicle, connected to the engine via a coolant circulation path, and a blower disposed around the engine to supply cooling air, enhancing cooling efficiency without additional coolant paths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If an auxiliary radiator is provided to cool the engine in the rear part, then the engine cooling efficiency is improved, but the device complexity and cost increase due to additional coolant circulation path

Engineering Contradiction:
Improveengine cooling efficiencyVSAvoidcoolant circulation path complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The cooling system is segmented into two independent parts: the front radiator handles cooling air flow while the blower handles direct engine cooling. This segmentation allows each component to focus on a specific cooling function, eliminating the need for a complex auxiliary coolant circulation path while maintaining effective engine cooling.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The blower is designed to perform multiple functions: it supplies cooling air directly to the engine and simultaneously prevents heat accumulation in the surrounding area. This multi-functionality replaces what would otherwise require separate cooling systems, reducing overall device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Temperature

If cooling air is supplied from the lateral side, then the engine cooling efficiency is improved, but the air intake path complexity increases

Engineering Contradiction:
Improveengine cooling efficiencyVSAvoidair intake path complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The blower is positioned to automatically draw cooling air from the lateral side of the body without requiring additional air intake mechanisms. The blower's own operation creates the air flow path, making the system self-sufficient and avoiding the need for complex external air intake paths.

Inventive Principle:
Principle #25Self-service

3Device complexity

If the battery is placed adjacent to the blower, then the electric circuit complexity is reduced, but the space arrangement becomes more constrained

Engineering Contradiction:
Improveelectric circuit complexityVSAvoidspace arrangement
Core Design Contradiction:
Device complexityVSShape

Solution Approach 1:

The battery and blower are merged into the same lateral compartment space. This spatial merging allows the electric circuit to be localized and simplified, as the power source and consumer are adjacent, reducing wiring complexity while the overall lateral compartment arrangement accommodates both components.

Inventive Principle:
Principle #5Merging (Combining)

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

The engine is cooled efficiently and at low cost by combining coolant circulation with blower-supplied air, reducing heat accumulation and eliminating the need for additional coolant paths, while simplifying the electric circuit with a battery adjacent to the blower.

Implementation Method 1

a radiator in a front part of the body, the radiator being connected to the engine via a coolant circulation path

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 2

the engine is cooled not only by the coolant circulating between the engine and the radiator

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 3

a blower disposed in a surrounding area of the engine and configured to supply cooling air to the engine

Methodology Applied
Scientific EffectForced convection: Forced Convection

Data Source

PatentUS20250389219A1Utility Vehicle
Publication Date: 2025.12.25 KUBOTA CORP
  • US20250389219A1 patent drawing
  • US20250389219A1 patent drawing
  • US20250389219A1 patent drawing

AI summary

A utility vehicle includes a radiator in a front part of the body, the radiator being connected to an engine via a coolant circulation path. A blower is disposed in a surrounding area of the engine and configured to supply cooling air to the engine.