Vehicle Parking Control Switch for Linked Brake and Gear Shift
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Solution Overview
Problem
Existing vehicle control systems integrating parking gear and parking brake switches face issues with operability and safety, particularly when the parking brake switch is operated accidentally during driving, leading to difficulty in quickly returning to the neutral gear and compromising traffic safety.
Innovation Solution
A vehicle control device and method that integrates the parking brake and parking gear functions into a single control switch, using vehicle speed detection to determine the appropriate operation, enabling deceleration or gear shift based on the duration of switch press, and maintaining braking force until a linked parking control is completed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the parking brake switch and parking gear switch are integrated into a single control switch, then the number of switches is reduced and operability is improved, but the ability to perform emergency braking while driving is lost
Solution Approach 1:
The control switch changes its function dynamically based on vehicle speed. When the vehicle is stationary or moving slowly (parked state), the switch performs linked parking control (activating both parking brake and parking gear). When the vehicle is moving at higher speeds (driving state), the switch performs emergency braking. This dynamic adaptation resolves the contradiction by allowing the single switch to provide both simplified operation and emergency braking capability depending on operating conditions.
Solution Approach 2:
The system uses vehicle speed as a parameter to determine the function of the control switch. By monitoring the vehicle speed parameter, the control unit distinguishes between parked state and driving state, thereby enabling the same switch to trigger different functions (linked parking vs. emergency braking) based on the current speed parameter.
2Reliability
If the control switch is pressed accidentally while driving, then emergency braking is activated, but it becomes difficult to quickly return to neutral gear
Solution Approach 1:
The system preliminarily determines the vehicle state (parked or driving) based on speed before executing the switch function. This preliminary assessment prevents accidental emergency braking during normal parking operations and ensures that when the switch is pressed during driving, the system is already in the correct state to perform emergency braking, eliminating the delay of returning to neutral gear first.
Solution Approach 2:
The control unit continuously monitors vehicle speed and provides feedback to determine the appropriate function for the control switch. This feedback mechanism ensures that the system responds correctly to switch presses based on current driving conditions, preventing unintended behavior and ensuring safe operation.
3Speed
If the parking brake is actuated while the vehicle is driving at high speed, then the vehicle decelerates, but the user's intended purpose (deceleration/stop) may not be achieved
Solution Approach 1:
The control switch dynamically adapts its function based on vehicle speed. At high speeds (driving state), pressing the switch activates emergency braking for immediate deceleration. At low speeds (parked state), pressing the switch performs linked parking control. This dynamic adaptation ensures that the system fulfills the user's deceleration intent appropriately for the current speed condition.
Data Source
AI summary
A vehicle control device includes: a gear changing part having a parking brake holding the vehicle in a stationary state, a driving gear that maintains driving the vehicle, and a parking gear that holds a parked state; a control switch disposed in the gear changing part and able to perform actuation of the parking brake and the parking gear simultaneously through an operation of pressing the control switch; a braking force holding part holding a braking force when the vehicle generates the braking force based on at least one of a driver operating a brake or operating the control switch; and a control part performing: when the control switch is pressed, performing a linked parking control so that the parking brake performs a linked actuation while the gear changing part is shifted to the parking gear. After the linked parking control ends, the holding of the braking force is released.