Parking Brake Fault Detection Using Solenoid Valve Feedback
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Solution Overview
Problem
Traditional parking brake systems in construction machinery lack effective fault detection methods, leading to unreliable operation and potential safety hazards due to undetected failures, which can cause slipping or damage to brake components.
Innovation Solution
A parking fault detection method and system that acquires a parking control signal, generates a control instruction, and sends it to the parking brake component, then acquires feedback signals to determine fault detection results, allowing for gear switching control and fault identification, ensuring reliable parking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydraulic parking brakes are used in construction machinery, then waterproof and dustproof effects are improved, but reliability deteriorates due to pipe burst failures that cannot be detected
Solution Approach 1:
The patent implements a feedback mechanism by detecting the voltage signal across the solenoid valve coil. When the parking brake fails to engage or release properly, the abnormal voltage signal provides feedback about the fault condition, enabling the system to detect pipe bursts or other failures in the hydraulic system.
Solution Approach 2:
The patent uses the voltage signal as an intermediary to indirectly detect the state of the hydraulic system. Instead of directly monitoring the hydraulic pressure or pipe integrity, the electrical voltage signal serves as a mediator that reflects the operational status of the solenoid valve and indicates potential failures.
2Device complexity
If traditional manual cable-actuated parking brakes are used, then simplicity is improved, but productivity deteriorates due to time-consuming manual operation
Solution Approach 1:
The patent replaces the manual mechanical cable-actuation system with an electronic control system using a solenoid valve. This substitution eliminates the need for manual cable pulling while maintaining the mechanical parking brake function, thereby improving operational speed and efficiency.
Solution Approach 2:
The patent uses a hydraulic system with a solenoid-controlled valve to actuate the parking brake. This hydraulic actuation system replaces the manual mechanical operation, providing faster and more efficient parking brake engagement and release while maintaining system simplicity.
3Extent of automation
If automatic transmission latch braking is used, then automation is improved, but harmful factors worsen due to large braking impact and rigid clamping
Solution Approach 1:
The patent uses a hydraulic system with a solenoid valve to control the parking brake application. This hydraulic actuation provides smoother and more controlled braking force compared to rigid mechanical latching, reducing the harmful impact and shock during parking brake engagement.
Solution Approach 2:
The patent changes the braking mechanism from rigid mechanical latching to hydraulic pressure-controlled actuation. This parameter change allows for more gradual and controlled application of braking force, reducing the impact and shock while maintaining automated operation.
Data Source
AI summary
Disclosed are a parking fault detection method, an apparatus, a system and a working machinery. The method includes: acquiring a parking control signal; the parking control signal is a parking signal or a parking release signal; in response to that it is determined that a parking control condition is met, generating a parking control instruction according to the parking control signal and sending the parking control instruction to a parking brake component of a working machinery; the parking brake component is configured to execute parking or parking release action according to the parking control instruction, and the parking control instruction is configured to correspond to the parking control signal; and acquiring a feedback signal of the parking brake component, and acquiring a parking fault detection result of the working machinery according to the feedback signal.