Vehicle Control Device Engine Starting Shift Switching Timing
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Solution Overview
Problem
Existing vehicle control systems cause driver discomfort due to simultaneous engine starting and shift switching, leading to delayed engine initiation during driver-initiated engine starting operations.
Innovation Solution
A control device that determines whether shift switching is permitted or prohibited based on predetermined times and power supply states, ensuring engine starting is initiated only when shift switching is not in progress, thereby preventing simultaneous operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine starting is always delayed by a predetermined time relative to the engine starting operation, then the simultaneous operation of engine starting and shift switching is prevented, but the driver easily feels uncomfortable with the delay in initiation of the engine starting
Solution Approach 1:
The patent applies dynamics by making the engine starting delay conditional rather than fixed. The control device dynamically adjusts whether to delay engine starting based on real-time detection of shift switching operations. When shift switching is detected within a predetermined time window, the engine starting is delayed; otherwise, it starts immediately. This dynamic adaptation resolves the contradiction by providing delay only when necessary to prevent simultaneous operations, thereby maintaining driver comfort.
2Ease of operation
If the engine starting is initiated immediately without delay, then the driver comfort is improved, but the engine starting may be performed simultaneously with the shift switching by the switching device
Solution Approach 1:
The patent applies preliminary action by detecting the shift switching operation in advance and using this information to control the engine starting timing. The control device monitors for shift switching commands within a predetermined time window before allowing engine starting. This preliminary detection mechanism enables the system to prevent simultaneous operations while minimizing unnecessary delays, thereby maintaining both reliability and driver comfort.
3Reliability
If a predetermined time delay is always applied to engine starting, then simultaneous operations are prevented, but the system efficiency is reduced due to unnecessary delays
Solution Approach 1:
The patent applies dynamics by making the engine starting delay conditional rather than fixed. The control device dynamically adjusts whether to delay engine starting based on real-time detection of shift switching operations. When shift switching is detected within a predetermined time window, the engine starting is delayed; otherwise, it starts immediately. This dynamic adaptation resolves the contradiction by providing delay only when necessary to prevent simultaneous operations, thereby maintaining driver comfort.
Solution Approach 2:
The patent applies partial action by implementing delay only in the specific case where shift switching is detected, rather than applying a fixed delay in all cases. This partial application of the delay mechanism eliminates unnecessary delays when shift switching is not occurring, thereby improving system efficiency while still preventing simultaneous operations when they would occur.
Data Source
AI summary
A control device of a vehicle including an engine, a power transmission device, a shift operation device, and a switching device includes: a shift-switching control portion outputting the control command signal when it is determined that the shift switching is permitted, and not outputting the control command signal when it is determined that the shift switching is prohibited, at the time of a shift switching operation; and an engine-starting control portion outputting a first signal causing the shift-switching control portion to determine that the shift switching is prohibited and initiating starting of the engine after determining that the shift switching is not being performed when it is determined that the shift switching is permitted at the time of an engine starting operation performed by the driver for starting the engine, and immediately initiating the engine when it is determined that the shift switching is prohibited.