Drift Mode Wheel Locking With Integrated ABS Brake Control
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Solution Overview
Problem
Existing performance braking systems for vehicles engaged in drifting are costly, complex, and not integrated with other vehicle control systems, requiring additional components like hydraulic lines and operating independently of other vehicle functions.
Innovation Solution
A vehicle system that includes driven wheels, an actuator, and a braking system with friction brakes, where a controller decouples the driven wheels from the actuator and engages the brakes to lock them up, allowing speed control and torque management based on measured and target speeds, integrating with existing ABS or brake-by-wire systems for responsive performance braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing performance braking systems are implemented for drifting, then wheel locking capability is achieved, but system complexity and cost increase due to additional hydraulic lines and independent operation from other vehicle systems
Solution Approach 1:
The patent merges the performance braking system with the existing ABS (Anti-lock Braking System) by integrating the drift mode control into the ABS controller. The friction brakes are controlled through the existing ABS hydraulic lines and control valves, eliminating the need for separate hydraulic lines and independent braking components. This consolidation reduces system complexity while maintaining wheel locking capability for drifting maneuvers.
Solution Approach 2:
The existing ABS system is made multi-functional by enabling it to perform both its traditional safety function (preventing wheel lockup during normal braking) and the new drift mode function (intentional wheel lockup for drifting). The controller is programmed to recognize drift mode activation and switch the braking system's behavior accordingly, allowing one system to serve multiple purposes without requiring separate dedicated components.
2Adaptability or versatility
If existing performance braking systems are implemented for drifting, then drifting maneuver capability is achieved, but integration with other vehicle control systems is lost as the system operates independently
Solution Approach 1:
The drift mode braking system is merged with the vehicle's existing control architecture by utilizing the ABS controller as the central control unit. The controller receives inputs from vehicle sensors (wheel speed sensors, steering angle sensor) and coordinates braking actions with other vehicle systems. This integration eliminates the need for independent operation while maintaining drifting capability, as the system leverages existing communication protocols and sensor networks already present in the vehicle.
3Ease of operation
If friction brakes are engaged to lockup driven wheels during drift mode, then controlled drifting is achieved, but vehicle control stability must be maintained through actuator speed control
Solution Approach 1:
The system implements feedback control by continuously monitoring wheel speed through existing wheel speed sensors and comparing actual wheel speed to target wheel speed. The ABS controller adjusts brake pressure dynamically based on this feedback to maintain the desired drift condition. This closed-loop control ensures that drifting remains controllable and predictable, maintaining vehicle stability even during intentional wheel lockup maneuvers.
Solution Approach 2:
The braking system transitions from static braking (normal operation) to dynamic braking (drift mode) where brake pressure is continuously adjusted during the maneuver. The controller modulates brake application in real-time based on vehicle state and driver inputs, allowing the system to adapt to changing conditions during drifting while maintaining overall vehicle control stability.
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
Enables highly responsive and integrated performance braking, reducing complexity and cost by digitally coupling a maneuvering input device to the brake system, allowing controlled wheel locking for drifting maneuvers while maintaining vehicle control.
Implementation Method 1
engage the friction brakes to lockup the driven wheels
Data Source
AI summary
A vehicle includes driven wheels, an actuator operably coupled to the driven wheels by a drivetrain, and a braking system having friction brakes associated with the driven wheels. A controller is programmed to, in response to the vehicle being in a drift mode, decouple the driven wheels from the actuator, engage the friction brakes to lockup the driven wheels, and place the actuator in speed control and command a torque to the actuator based on a difference between a measured speed of the actuator and a target speed of the actuator.