Vehicle Parking Brake Integrated Transmission EBS Control
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Solution Overview
Problem
Existing parking brake systems for vehicles, especially those with multiple non-driven axles or trailers, face complexity and inadequate auxiliary brake support, leading to insufficient braking effect and increased structural complexity.
Innovation Solution
Integration of a parking brake system into the vehicle's transmission with a manual control unit connected to the EBS system, allowing for auxiliary brake support on non-driven axles and trailer control, along with a battery for power backup, enabling gradable and reliable braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded brake cylinder is provided on each vehicle wheel to enable braking action, then the vehicle can be braked effectively, but the structural complexity of the parking brake system becomes very high
Solution Approach 1:
The patent merges the parking brake system with the transmission system by integrating the parking brake actuator into the transmission housing and using the transmission's hydraulic system for brake actuation. This combination eliminates the need for separate brake cylinders on each wheel, reducing structural complexity while maintaining effective braking through the integrated hydraulic pressure distribution.
Solution Approach 2:
The transmission hydraulic system is designed to serve multiple functions: power transmission, gear shifting, and parking brake actuation. By making the hydraulic system universal, the patent eliminates dedicated brake components and uses the same hydraulic infrastructure for both transmission control and parking brake application, thereby reducing overall system complexity.
2Device complexity
If the parking brake is integrated into the transmission, then the device complexity is reduced, but the braking effect is insufficient for vehicles with multiple non-driven axles
Solution Approach 1:
The patent introduces an EBS (Electronic Brake System) as an intermediary to supplement the integrated parking brake system. The EBS provides additional braking force on non-driven axles through electronic control of brake actuators, while the integrated transmission parking brake handles the driven axle. This intermediary system resolves the contradiction by distributing braking functions across different systems based on axle type.
Solution Approach 2:
The braking function is segmented by axle type: the integrated transmission parking brake handles driven axles, while the EBS system handles non-driven axles. This segmentation allows each subsystem to be optimized for its specific function, maintaining simplicity where possible while providing sufficient braking effect where needed.
3Reliability
If additional protection against double loading is provided when parking brake and service brake are actuated simultaneously, then safety is improved, but the device complexity increases
Solution Approach 1:
The control unit continuously monitors the operational state of both the parking brake and service brake systems, providing feedback on brake application status. When simultaneous actuation is detected, the control unit automatically manages the braking forces to prevent double loading, using sensor feedback to coordinate between the two brake systems and eliminate the need for additional mechanical protection devices.
Data Source
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AI summary
The handbrake system (10) has a manual control unit (20) comprising a connector (32) for an electronic braking system (34), where the handbrake system is integrated in a drive (14) of a vehicle (12). A control device (16) is coupled with a trailer control module (18) and controls the drive and a clutch (26) of the vehicle. The manual control unit transmits a driver command to the control device, where the command is provided for operating the handbrake system. A battery (30) is provided for power supply during power breakdown. An independent claim is also included for a method for operating a handbrake system.