Hand-Held Soil Compactor Electric Valve Water Flow Control

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Solution Overview

Problem

Existing hand-held soil compaction machines with water sprinkler systems lack improved operating comfort and efficient control mechanisms for the water sprinkling system, which are essential for optimal soil compaction and operator convenience.

Innovation Solution

A hand-held soil compaction machine equipped with a water sprinkling system featuring an electric valve controlled by a control device with an input module, allowing for multiple operational states and adaptive control based on environmental and operating parameters, along with a gravity-driven system and optional pump for precise water management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a manual water sprinkler system is used in hand-held soil compaction machines, then the device complexity is reduced, but the ease of operation and water distribution precision deteriorate

Engineering Contradiction:
Improveoperating comfortVSAvoidcontrol system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical water control with an electrically actuated valve system. The valve can be controlled via input devices (buttons, switches, or voice commands) and automatically adjusts water flow based on operating conditions such as machine inclination angle and vibration frequency, eliminating the need for manual intervention while maintaining system simplicity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The water sprinkler system is designed to automatically regulate its own operation based on sensor feedback. The control unit monitors parameters like machine tilt angle and vibration characteristics, then autonomously adjusts the electric valve to optimize water distribution without requiring operator input or complex manual adjustments.

Inventive Principle:
Principle #25Self-service

2Productivity

If water sprinkling is continuously applied during soil compaction, then soil compaction effectiveness is improved, but water consumption and energy use increase

Engineering Contradiction:
Improvesoil compaction efficiencyVSAvoidenergy consumption
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

The system implements periodic or intermittent water sprinkling rather than continuous application. The control unit activates the electric valve at specific intervals or under specific conditions (e.g., when soil dryness is detected or during high-intensity compaction phases), allowing water to be applied only when necessary for optimal compaction effectiveness.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The water sprinkling system dynamically adjusts its operation based on real-time monitoring of compaction parameters. The electric valve opening degree and sprinkling intensity are continuously modified according to machine inclination angle, vibration frequency, and soil conditions, optimizing water application efficiency while minimizing overall water and energy consumption.

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If multiple water flow states are implemented in the electric valve, then adaptability to different operating conditions is improved, but device complexity increases

Engineering Contradiction:
Improveadaptive control capabilityVSAvoidvalve system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The electric valve is designed with multiple adjustable opening states (fully closed, partially open, fully open) that can be dynamically selected based on operating conditions. The control unit automatically transitions between these states by receiving input from sensors measuring machine inclination and vibration parameters, enabling adaptive water flow control without requiring complex mechanical valve mechanisms.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

Instead of using complex mechanical valve systems with multiple physical positions, the patent employs an electrically actuated valve controlled by electronic signals. The multi-state capability is achieved through electronic control of the valve opening degree, simplifying the mechanical structure while maintaining or enhancing adaptability to different compaction conditions.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

Enhances operating comfort and efficiency by enabling precise water distribution, adapting to changing conditions, and integrating the sprinkler system within the machine's control system, thus improving soil compaction outcomes and operator ergonomics.

Implementation Method 1

an electric valve (17) for controlling a water flow through the line system (13)

Methodology Applied
Scientific EffectElectric valve actuation: Valve

Implementation Method 2

A gravity-driven system and optional pump for precise water management

Methodology Applied
Scientific EffectGravity-driven flow: Gravitation

Implementation Method 3

A gravity-driven system and optional pump for precise water management

Methodology Applied
Scientific EffectPump action: Pump

Implementation Method 4

an electric valve (17) for controlling a water flow through the line system (13), and a control device (1) for controlling the electric valve (17)

Methodology Applied
Scientific EffectElectric control: Valve

Data Source

PatentEP4632148A1Hand-held soil compacting machine with electric water sprinkling system and method for controlling a water sprinkling system of a hand-held soil compacting machine
Publication Date: 2025.10.15 BOMAG GMBH
  • EP4632148A1 patent drawingFigure 1a~1c
  • EP4632148A1 patent drawingFigure 2~3
  • EP4632148A1 patent drawingFigure 4~5

AI summary

A hand-held soil compaction machine with a water sprinkler system, wherein the water sprinkler system comprises a water sprinkler device; a water tank connected to the water sprinkler device via a piping system; an electric valve for controlling a water flow through the piping system; and a control device for controlling the electric valve with an input module, and wherein the electric valve has at least one defined closed state and at least one defined first open state. Furthermore, there is a method for controlling a water sprinkler system of a hand-held soil compaction machine with an electric valve.