Electronic Park Brake Module Intent Detection
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Solution Overview
Problem
Conventional electronic park brake systems can be unintentionally actuated while the vehicle is in motion, leading to undesirable sudden braking forces, as they require minimal actuation force and lack differentiation between driver intents during dynamic braking.
Innovation Solution
An electronic park brake module with a processor and memory unit that determines the driver's intent based on the brake pedal state, sending commands for either high or low braking force accordingly, to provide appropriate braking assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electronic park brake system is easily actuated through a button, then the ease of operation is improved, but the reliability deteriorates due to unintentional actuation
Solution Approach 1:
The system continuously monitors brake pedal position and vehicle speed, using this feedback to determine whether to apply full or reduced braking force. This feedback mechanism prevents unintentional actuation by verifying the vehicle state before applying brakes.
Solution Approach 2:
The braking force is dynamically adjusted based on real-time vehicle conditions. Instead of a fixed braking force, the system varies the braking intensity according to brake pedal position and vehicle speed, allowing easy actuation while preventing unintended full braking.
2Productivity
If the electronic park brake applies predetermined braking force in dynamic mode, then the productivity is improved by providing deceleration assistance, but the object-affected harmful factors worsen due to sudden unexpected braking
Solution Approach 1:
The system changes the braking force parameter based on vehicle speed and brake pedal position. At high speeds, reduced braking force is applied to avoid sudden harsh braking, while at low speeds, full braking force is available for effective stopping assistance.
Solution Approach 2:
Instead of applying full predetermined braking force in all dynamic conditions, the system applies partial braking force when vehicle speed is high or brake pedal is not sufficiently depressed, providing deceleration assistance without causing sudden harmful braking effects.
3Reliability
If the electronic park brake differentiates between first and second intent, then the reliability is improved by reducing unintentional braking, but the device complexity increases due to additional sensing and control logic
Solution Approach 1:
The existing brake pedal position sensor and vehicle speed sensor are used for multiple purposes: normal brake control, dynamic park brake activation, and intent differentiation. This multi-functionality approach improves reliability without significantly increasing device complexity.
Solution Approach 2:
The system uses its own existing sensors (brake pedal position and vehicle speed sensors) to determine driver intent, rather than requiring separate dedicated sensors. This self-service approach enables intent differentiation while minimizing additional hardware complexity.
Data Source
AI summary
An electronic park brake module for use with a vehicle is disclosed herein. In an embodiment, the electronic park brake module includes, but is not limited to, a processor and an electronic memory unit. The processor and the electronic memory unit are configured to cooperate to determine when a user has made a request for dynamic electronic park braking, to determine whether the user has a first intent or a second intent when requesting dynamic electronic park braking, to send a first command causing a first amount of braking force to be applied when the first intent has been determined, and to send a second command causing a second amount of braking force to be applied when the second intent has been determined.