Dump Body PTO Control Under RPM, Speed, and Incline Limits

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Solution Overview

Problem

Dump trucks are often operated with the dump body in the raised position after unloading, leading to potential damage to the hydraulic system and safety hazards such as striking overpasses or power wires, and existing systems do not adequately prevent these issues.

Innovation Solution

A controller system that communicates with sensors to ensure safe operation of the dump body by engaging the power take-off (PTO) only within specific engine RPM, speed, and incline parameters, and includes a strobe light for alerting others when the PTO is engaged.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the dump body is left in the raised position after unloading, then the truck can quickly be prepared for the next load, but the hydraulic system suffers undue wear and damage

Engineering Contradiction:

Improvetruck preparation speedVSAvoidhydraulic system durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The controller continuously monitors dump body position via sensors and provides feedback to automatically lower the body when not in use, preventing hydraulic system wear while maintaining quick preparation capability

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system automatically monitors and adjusts dump body position without operator intervention, lowering the body after unloading to protect the hydraulic system while requiring no additional manual steps from the operator

Inventive Principle:

Principle #25Self-service

2Ease of operation

If the dump body is operated without monitoring operating conditions, then the system is simpler to operate, but safety hazards such as striking overpasses or power wires occur

Engineering Contradiction:

Improveoperation simplicityVSAvoidsafety hazards

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary checks of operating conditions (position, speed, RPM) before allowing PTO engagement, preventing unsafe operation while maintaining simple interface for the operator

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Sensors continuously monitor dump body position, truck speed, and engine RPM, providing real-time feedback to the controller to prevent operation under unsafe conditions without complicating the operator interface

Inventive Principle:

Principle #23Feedback

3Ease of operation

If the PTO is engaged without monitoring engine RPM, then the system is easier to operate, but the hydraulic system experiences undue wear and damage

Engineering Contradiction:

ImprovePTO engagement simplicityVSAvoidhydraulic system durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The controller checks engine RPM before allowing PTO engagement, ensuring the engine is operating within the optimal range to protect the hydraulic system while maintaining simple operation through automatic monitoring

Inventive Principle:

Principle #10Preliminary action

4Productivity

If the dump body is operated at high speeds, then productivity is improved, but safety risks increase due to potential damage and loss of control

Engineering Contradiction:

Improvetransport speedVSAvoidsafety risks

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Speed sensors provide continuous feedback to the controller, which monitors and limits operating speed to safe levels while maintaining productivity through optimized speed management

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250296493A1Dump truck

Publication Date: 2025.09.25 LOGAN CORP

AI summary

Present embodiments relate to a dump truck. More specifically, but without limitation, present embodiments relate to a dump truck having a controller which receives inputs of vehicle conditions and controls output related to power take off (PTO) engagement of hydraulic pump and operation of the dump body. The features that provide the inputs improve safe operation of a dump body of the dump truck.