Vehicle Control Device Scheduling Engine Start and Gear Shift
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Solution Overview
Problem
Existing vehicle control systems face challenges in preventing the concurrent execution of engine start control and gear shift control, leading to potential delays and reduced acceleration responsiveness, especially when both controls are needed simultaneously during automatic driving.
Innovation Solution
A control device with an electronic control unit that determines the possibility of concurrent execution and schedules one control to finish before the other, allowing for sequential execution without actual concurrency, thereby avoiding delays and optimizing torque delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gear shift control and start control are executed in turn after actual concurrent execution occurs, then shock is reduced, but one control is executed late relative to the period during which both controls are concurrently executed
Solution Approach 1:
The control device predicts whether gear shift control and start control will concurrently execute in future traveling, and if so, proactively schedules them to execute in turn before the actual concurrent execution occurs. This preliminary scheduling avoids the delay that would result from waiting until concurrent execution actually happens, while still preventing shock by ensuring sequential execution.
2Device complexity
If the gear shift control and start control are prevented from being concurrently executed only when one control is executed late, then execution simplicity is maintained, but acceleration responsiveness deteriorates
Solution Approach 1:
The control device performs preliminary prediction and scheduling of gear shift control and start control execution timing, allowing both controls to be executed timely without actual concurrent execution, thereby improving acceleration responsiveness while maintaining control execution simplicity through automated prediction-based scheduling.
3Speed
If the electronic control unit predicts and schedules control execution in advance, then acceleration responsiveness is improved, but control complexity increases
Solution Approach 1:
The control device uses feedback from the automatic driving control system, including target traveling state information and actual traveling conditions, to predict whether gear shift control and start control will concurrently execute. This feedback-based prediction enables responsive scheduling without requiring overly complex control logic, as the system leverages existing control data.
Data Source
AI summary
A control device for a vehicle includes an electronic control unit configured to perform an automatic driving control, to determine whether there is a possibility that a start control of an engine and a gear shift control of an automatic transmission are concurrently executed in a future traveling under the automatic driving control, during execution of the automatic driving control, and to first execute one control of the start control of the engine and the gear shift control of the automatic transmission in the future traveling and execute the other control after the one control finishes, when the electronic control unit determines that there is the possibility that the start control of the engine and the gear shift control of the automatic transmission are concurrently executed in the future traveling under the automatic driving control.