Vehicle Brake Controller Clutch State Reliability
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Solution Overview
Problem
Existing brake control systems for vehicles require extensive design changes and sensor attachments to evaluate clutch connection and disconnection states, leading to increased work and potential reliability issues with secondary information used in brake control.
Innovation Solution
A controller and control method that selectively uses primary and secondary information to determine the match between actual and assumed clutch states, executing brake control based on primary information when the states do not match, thereby improving the reliability evaluation and applicability of brake control without relying on motion monitoring of input and output shafts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motion monitoring of input shaft and output shaft is used to evaluate clutch state reliability, then reliability evaluation accuracy is improved, but device complexity and sensor attachment requirements increase
Solution Approach 1:
The patent extracts the reliability evaluation function from the physical clutch mechanism by using operational data (clutch operation state, vehicle speed, acceleration) to infer clutch connection/disconnection states. This eliminates the need for direct sensor attachment to the clutch shafts while maintaining evaluation capability through data-driven state estimation.
Solution Approach 2:
The patent replaces the mechanical monitoring system (sensors on input/output shafts) with an information processing system that uses operational parameters to determine clutch states. The controller evaluates reliability by analyzing temporal changes in operational data rather than direct mechanical motion monitoring, substituting physical sensors with computational analysis.
2Measurement precision
If secondary information is used to supplement primary information in brake control, then control accuracy is improved, but system complexity and workload increase
Solution Approach 1:
The patent applies partial action by selectively using secondary information only when reliability is high. The controller evaluates the reliability of secondary information (clutch state assumptions) and uses it to supplement primary brake control information only when the evaluation indicates sufficient reliability, avoiding the complexity of processing unreliable data while maintaining control accuracy when possible.
Solution Approach 2:
The patent implements feedback through reliability evaluation mechanisms that monitor the consistency between assumed clutch states and actual vehicle behavior. The controller continuously assesses whether secondary information aligns with primary information and adjusts its use accordingly, creating a feedback loop that optimizes the balance between control accuracy and system complexity.
Data Source
AI summary
A controller and a control method to a vehicle, the controller and the control method executing brake control in which primary information is selectively supplemented by secondary information that is information on an assumed state related to connection and disconnection of a clutch. The controller includes a determination section that determines whether an actual state and the assumed state, which are related to the connection and the disconnection of the clutch, match each other in accordance with a temporal change in the secondary information; and a brake control section that executes the brake control by using the primary information but not the secondary information in the case where the determination section determines that the actual state and the assumed state do not match each other.