Electromagnetic Differential Locking for Smooth Wheel Speed Control
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Solution Overview
Problem
Conventional differential assemblies in automobiles are complex and unreliable due to their actuation by hydraulic or pneumatic transmission systems, which complicates the smooth adjustment of wheel speeds during turns.
Innovation Solution
A differential assembly actuated by an electromagnetic valve, which controls the differential unit to adjust wheel speeds by switching between states to engage or disengage the planet gear, allowing synchronized or differential wheel rotation based on the valve's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic or pneumatic transmission systems are used to actuate the differential, then the differential can be actuated, but the system becomes complex in structure and less reliable
Solution Approach 1:
The patent replaces the hydraulic or pneumatic transmission system with a direct electromagnetic actuation system. The electromagnetic valve directly actuates the differential locking mechanism through a transmission arm, eliminating the need for complex hydraulic fluid pathways or pneumatic pressure systems. This substitution of the actuation mechanism reduces structural complexity while maintaining reliable differential function.
Solution Approach 2:
The patent extracts and removes the hydraulic or pneumatic transmission components from the differential actuation system. By eliminating these intermediate transmission systems and using direct electromagnetic actuation, the patent simplifies the overall structure while preserving the essential differential actuation capability.
2Ease of operation
If conventional hydraulic or pneumatic systems are used, then differential actuation is achieved, but wheel speed adjustment becomes less smooth
Solution Approach 1:
The patent employs an electromagnetic valve that can be precisely controlled to dynamically adjust the engagement state of the differential locking mechanism. By controlling the electromagnetic valve's activation duration and intensity, the system achieves smooth and progressive wheel speed adjustment, improving ease of operation compared to the on/off nature of hydraulic or pneumatic systems.
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 electromagnetic actuation simplifies the differential system, enhancing reliability and enabling smooth, controlled wheel speed adjustments during turns, improving the overall performance of the vehicle.
Implementation Method 1
an electromagnetic valve; a differential locking apparatus which comprises: a transmission arm having a first end portion coupled to the electromagnetic valve
Data Source
AI summary
A differential assembly includes a differential unit, an electromagnetic valve and an differential locking apparatus including an engaging ring. The differential unit includes a first side gear, a second side gear, and a planet gear engaging with the first side gear and the second side gear. The electromagnetic valve is operated between a first state and a second state. In the first state, the electromagnetic valve is switched to drive the engaging ring to engage with the first side gear, such that the planet gear remains stationary while the first and second side gears are driven to rotate in approximately the same speed. In the second state, the electromagnetic valve is switched to drive the engaging ring to disengage from the first side gear, such that the planet gear can be driven to rotate for driving the first and the second side gears to rotate in different speeds.