Hybrid Powertrain Coupling Control During Progressive Pedal Input
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Solution Overview
Problem
In vehicles with automatic gearboxes, progressive pressure on the accelerator pedal often leads to multiple gear changes occurring after coupling with the driving machine, delaying torque availability and causing 'several-stage' acceleration, which affects driving pleasure.
Innovation Solution
A method that detects progressive pressure on the accelerator pedal by calculating the signed gradient of its position and inhibits coupling control until the gradient stabilizes, preventing premature torque transmission and synchronizing gear changes with coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If coupling control is enabled during progressive accelerator pedal pressure, then torque transmission begins earlier, but multiple gear changes occur after coupling causing delayed torque availability and multi-stage acceleration
Solution Approach 1:
The system performs preliminary detection of progressive accelerator pedal pressure and proactively inhibits coupling control before gear changes occur. By detecting the gradient of accelerator pedal position and predicting upcoming gear changes, the system prevents coupling from occurring during periods that would trigger multiple sequential gear changes, thereby ensuring immediate torque availability when coupling finally occurs.
2Stability of the object's composition
If coupling control is inhibited during progressive accelerator pedal pressure, then multiple gear changes are prevented, but torque transmission is delayed
Solution Approach 1:
The system continuously monitors the accelerator pedal position and calculates its gradient to detect progressive pressure. This feedback mechanism allows the coupling control to be dynamically adjusted - inhibited only when progressive pressure indicating upcoming gear changes is detected, and enabled when the pedal position stabilizes. The confirmation duration parameter ensures the feedback signal is sustained before changing coupling state, preventing premature resumption of coupling control.
3Adaptability or versatility
If separate independent functions control coupling and gear selection, then each function operates independently, but coordination between them causes multiple gear changes after coupling
Solution Approach 1:
The system merges the previously independent coupling control function with gear selection logic by introducing a unified detection mechanism. The coupling control now incorporates detection of progressive accelerator pedal pressure and upcoming gear changes, combining what were previously separate decision-making processes into a coordinated control system that considers both coupling timing and gear state simultaneously.
Data Source
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AI summary
The method is designed to control the coupling of a wheel train to a drive machine (MM) in a drive train of a vehicle, the drive train comprising an automatic gearbox (BV) and a coupling member (OC) for coupling with the drive machine, the method comprising a provision, by a computer (CTRL) of the vehicle, of a coupling command (CC) to the coupling member depending on an actuation of an accelerator pedal (PA) of the vehicle. According to the invention, the method comprises a detection of a predetermined type of actuation of the accelerator pedal likely to result in at least one gear change in the automatic gearbox, and the inhibition (AC) of the coupling command in order to prevent torque from being transmitted by the coupling member when the predetermined actuation type is detected.