Steering Motor Contacts Detect Moisture
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Solution Overview
Problem
Existing power steering systems face increased risk of water ingress and subsequent failures, particularly in belt-driven systems, leading to costly sensor requirements for detecting malfunctions like belt jumps, which can compromise safety and increase maintenance costs.
Innovation Solution
A power steering device with a moisture detection system that utilizes motor contacts and drainage slopes to collect and detect moisture in the housing, allowing for early detection and prevention of water ingress, thereby eliminating the need for costly sensors and ensuring reliable steering assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive sensors are used to detect belt slippage and water ingress, then detection precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The motor contacts serve dual purposes: their primary function of electrical connection and their secondary function as moisture detection sensors. The motor contacts themselves detect moisture through changes in electrical properties when water is present, eliminating the need for separate sensor components.
Solution Approach 2:
The motor contacts are designed to perform multiple functions: electrical contact for motor operation and moisture detection for safety monitoring. This multi-functionality reduces the total component count and system complexity while maintaining detection capabilities.
2Object-generated harmful factors
If drainage openings with valves are provided in the motor housing, then water drainage capability is improved, but the risk of water ingress at the valve location increases
Solution Approach 1:
The mechanical valve system is replaced with a passive drainage slope design that uses gravity to guide water to collection areas. This eliminates moving parts and potential failure points while maintaining effective water drainage and reducing ingress risks at valve locations.
3Productivity
If belt-driven transmission is used, then steering assistance is provided, but belt slippage and jumps occur due to water ingress
Solution Approach 1:
The system performs preliminary detection of moisture using the motor contacts before water can reach and affect the belt transmission. Early detection allows for preventive measures to be taken, avoiding belt slippage and potential failure.
Solution Approach 2:
The motor contacts provide continuous feedback about moisture levels in the housing. This feedback mechanism allows the system to monitor conditions and alert operators before water reaches critical components like the belt, preventing slippage and maintaining reliable operation.
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 system provides cost-effective and reliable detection of moisture, preventing malfunctions and ensuring safety by directing moisture to a collection area where it can be detected before causing damage, reducing the likelihood of sudden failures and maintaining vehicle safety.
Implementation Method 1
The base region of the housing (20) includes at least one drainage slope (40)
Implementation Method 2
at least two motor contacts (52) of the auxiliary motor (16) are arranged in fluidic communication with the moisture collection section (48) or directly within the moisture collection section, and these motor contacts (52) are designed as means for detecting moisture
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a steering aid device for a motor vehicle with a steering rod (12) extending in the transverse direction of the vehicle and an auxiliary motor (16), which is functionally coupled to the steering rod (12) by means of a transmission device (18) in order to transmit a steering aid force and/or a steering aid torque to the steering rod (12) as required, wherein the transmission device (18) is at least partially arranged in a housing (20) which extends into an area below the transmission device (18), wherein at least one means for detecting moisture (50) is arranged in the housing (20) such that moisture is detectable in a bottom area (38b) of the housing (20).