Tractor Reducing Agent Pump Lateral Mounting for Engine Room Space

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Solution Overview

Problem

Conventional tractors face challenges in mounting a large reducing agent pump due to limited space in the engine room, necessitating a larger engine compartment.

Innovation Solution

The tractor design positions the reducing agent pump laterally outward of the body frame, covered by a pump cover, with an entrance step serving as a guard, and a dividable cover allowing easy maintenance access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the reducing agent pump is mounted in the engine room, then it is protected by the engine room structure, but the pump size is limited by the available space

Engineering Contradiction:

Improvereducing agent pump sizeVSAvoidengine room space

Core Design Contradiction:

Volume of moving objectVSArea of stationary object

Solution Approach 1:

The reducing agent pump is relocated from the constrained engine room space to the lateral exterior of the body frame, utilizing the third dimension (lateral space) to accommodate a larger pump volume without increasing the engine room footprint

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Volume of moving object

If the reducing agent pump is placed laterally outward of the body frame, then a larger pump can be accommodated, but the pump becomes exposed and requires additional protection

Engineering Contradiction:

Improvereducing agent pump sizeVSAvoidpump exposure to external factors

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The entrance step is designed to serve dual functions: providing entry access to the driver section and simultaneously acting as a protective guard for the reducing agent pump, eliminating the need for separate protective structures

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The protective function is merged with the existing entrance step structure, combining two functions (protection and access) into a single structural element to avoid additional components

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If the pump cover is made as a single piece, then the structure is simple, but maintenance requires removing the entire pump

Engineering Contradiction:

Improvepump cover structureVSAvoidmaintenance accessibility

Core Design Contradiction:

Device complexityVSEase of repair

Solution Approach 1:

The pump cover is divided into multiple detachable sections (first pump cover section and second pump cover section), allowing selective removal of only the cover portion needed for maintenance while leaving the pump mounted in position

Inventive Principle:

Principle #1Segmentation

4Reliability

If the pump holder includes a separate coupler for coupling to the body frame, then the coupling is secure, but the device complexity and weight increase

Engineering Contradiction:

Improvecoupling securityVSAvoidpump holder structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The tank holder is designed to serve dual functions: holding the reducing agent tank and simultaneously acting as the coupler for mounting the pump holder to the body frame, eliminating the need for a separate coupler component

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP4596852A1tractor

Publication Date: 2025.08.06 KUBOTA CORP

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AI summary

A tractor includes: a reducing agent pump (60) disposed laterally outward of a body frame (1) and configured to supply a reducing agent to an exhaust gas cleaning device (25); and a pump cover (61) covering the reducing agent pump (60).