Steerable Series Motor Hydraulic Valve Configuration
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Solution Overview
Problem
Existing vehicle systems lack efficient steering capabilities that allow for high-speed operation while maintaining motor series configuration, which is essential for precise control and maneuverability.
Innovation Solution
A hydraulic system with a configuration of first and second hydraulic pumps, directional valves, and a linking valve that allows for selective operation of hydraulic motors in series and parallel modes, enabling high-speed and low-speed operations by controlling the flow of hydraulic fluid between motors, thereby facilitating steerable two-speed series motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If motors operate in series at high speed, then vehicle speed is improved, but steering capability deteriorates
Solution Approach 1:
The hydraulic system is segmented into multiple independent valve components (first directional valve, second directional valve, linking valve) that can independently control hydraulic flow to different motors. This segmentation allows the system to maintain series configuration for speed while enabling independent control of individual motors for steering when needed.
Solution Approach 2:
The valve system dynamically reconfigures the hydraulic circuit between series and parallel configurations. The linking valve dynamically connects or disconnects the hydraulic lines between motors, allowing transition from series operation (for high speed) to parallel operation (for steering), making the system adaptable to different operational requirements.
2Ease of operation
If motors operate in parallel, then steering capability is improved, but vehicle speed deteriorates
Solution Approach 1:
The system dynamically switches between parallel and series configurations through the valve mechanism. When steering is required, the linking valve opens to create parallel hydraulic flow paths, allowing independent motor control. When speed is prioritized, the linking valve closes to force series configuration, maximizing vehicle speed.
3Adaptability or versatility
If valve system complexity increases, then motor control flexibility is improved, but device complexity deteriorates
Solution Approach 1:
The valve system is designed with multi-functionality where the first directional valve, second directional valve, and linking valve collectively perform multiple functions: controlling motor direction, regulating flow distribution, switching between series/parallel configurations, and enabling both high-speed travel and steering operations through a unified hydraulic control architecture.
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
Enables high-speed straight travel and non-linear steering by adjusting the flow rates to the motors, allowing for efficient and precise vehicle movement while maintaining the motors in a series relationship.
Implementation Method 1
first and second hydraulic pumps drawing hydraulic fluid from the reservoir and providing a basic flow of hydraulic fluid to the hydraulic system
Implementation Method 2
a first directional valve actuable to place a selected one of the first and second pump lines in communication with the first pump and the other of the first and second pump lines in communication with the reservoir
Implementation Method 3
a linking valve actuable between a first position in which the linking valve cuts off communication between the second and third motor lines, and second position in which the linking valve places the second and third motor lines in communication with each other
Implementation Method 4
first and second hydraulic motors; and first and second motor lines communicating with the first motor; and third and fourth motor lines communicating with the second motor
Data Source
AI summary
A hydraulic system includes first and second pumps, first and second motors, and three valves for selectively creating combined and basic hydraulic flow. The arrangement of valves permits combined flow to be provided to both motors in series to cause high speed operation of the motors, and permits combined flow to be provided to one motor and basic flow to the other motor. When applied to a vehicle, the arrangement provides a steerable high speed series arrangement of the vehicle's drive motors.