Vehicle Controller Torque Boost Logic
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Solution Overview
Problem
Existing vehicle control systems face challenges in balancing boost torque output to satisfy rider requests while maintaining appropriate driving feeling, as current boost control methods either deteriorate driving feeling or limit opportunities for boost control.
Innovation Solution
A vehicle controller that determines target torque based on normal, first boost, and second boost rules, adjusting torque output based on accelerator opening degree and vehicle conditions, with distinct boost rules for different scenarios to optimize torque delivery and inform the rider of boost control states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If boost control is applied to satisfy rider acceleration requests, then acceleration performance is improved, but driving feeling deteriorates
Solution Approach 1:
The patent applies dynamics by making the boost control system adaptive to different vehicle states. The controller dynamically adjusts boost torque application based on real-time detection of vehicle stop state, accelerator opening degree, and travel state, ensuring optimal acceleration performance while maintaining natural driving feeling across varying operating conditions
Solution Approach 2:
The patent changes the parameter of boost torque magnitude based on vehicle state. During stop state, larger boost torque is applied for stronger acceleration response, while during travel state, smaller or no boost torque is applied to maintain smooth driving feeling, thus resolving the contradiction between acceleration performance and driving comfort
2Ease of operation
If boost control opportunities are limited to maintain driving feeling, then driving feeling is improved, but rider requests are not adequately satisfied
Solution Approach 1:
The patent segments the operating conditions into distinct states (stop state vs. travel state) and applies different boost control strategies to each segment. This allows the system to provide aggressive boost control when needed (stop state) while maintaining smooth operation during normal travel, thus satisfying rider requests without compromising overall driving feeling
Solution Approach 2:
The system dynamically determines whether to apply boost control based on real-time vehicle state detection. The controller transitions between different control modes (boost control enabled/disabled) according to accelerator opening degree and vehicle state, ensuring rider requests are adequately satisfied while maintaining appropriate driving feeling
3Speed
If boost torque is added to normal torque, then acceleration request satisfaction is improved, but torque delivery complexity increases
Solution Approach 1:
The patent simplifies the control complexity by changing parameters based on predefined vehicle states rather than using complex continuous control. The controller adjusts torque parameters (boost torque magnitude) based on discrete state detection (stop state vs. travel state), making the control logic more manageable while still satisfying acceleration requests effectively
Data Source
AI summary
Processing circuitry is configured such that: when a boost request is not being generated, the processing circuitry determines, as target torque of a prime mover in accordance with a normal rule, normal torque which corresponds to an acceleration request amount; when the boost request is generated under a first condition, the processing circuitry determines, as the target torque of the prime mover in accordance with a first boost rule, first boost torque obtained by adding first additional torque to the normal torque; and when the boost request is generated under a second condition different from the first condition, the processing circuitry determines, as the target torque in accordance with a second boost rule different from the first boost rule, second boost torque obtained by adding second additional torque to the normal torque.