Vehicle Drive Torque Control During Delivery State
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Solution Overview
Problem
Existing vehicle control systems do not effectively manage drive torque during the delivery state, leading to increased driver burden and potential insufficient drive torque when navigating obstacles like ramps or humps, while also requiring time-consuming learning processes that lower factory productivity.
Innovation Solution
A control system that includes a drive torque controller, an accelerator operation amount detection unit, and a delivery state determination unit, utilizing conversion tables to adjust accelerator operation amounts and drive torque based on the delivery state, and performing learning processes during delivery to correct component variations, with a supercharger controller reducing supercharging pressure in the delivery state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a normal conversion table is applied in the delivery state, then drive torque increases with accelerator operation, but driver burden increases and drive torque may be insufficient when navigating obstacles
Solution Approach 1:
The patent applies a delivery-specific conversion table that dynamically adjusts the relationship between accelerator operation amount and drive torque. In delivery state, the conversion table is configured to limit the rate of torque increase, preventing sudden torque surges that would increase driver burden, while still providing sufficient torque for navigating obstacles like ramps and humps during the delivery process.
2Manufacturing precision
If learning processes are performed to correct component variations, then manufacturing precision improves, but factory productivity decreases due to time consumption
Solution Approach 1:
The patent performs learning processes during the delivery state, which occurs after manufacturing is complete but before the vehicle enters normal service. This timing allows learning to be conducted without impacting factory productivity, as the learning process utilizes the delivery period when the vehicle is being transported to the customer location. The learning corrects component variations and improves manufacturing precision without adding time to the manufacturing process.
Data Source
AI summary
A control system for a vehicle includes an acceleration operation sensor to detect an amount of an acceleration operation. Circuitry is configured to calculate a first acceleration control amount as an acceleration control amount based on the amount of the acceleration operation according to a relationship between the amount of the acceleration operation and the first acceleration control amount when it is determined that the vehicle is not in a delivery state. The circuitry is configured to calculate a second acceleration control amount as the acceleration control amount based on the amount of the acceleration operation according to a second relationship between the amount of the acceleration operation and the second acceleration control amount when it is determined that the vehicle is in the delivery state. The second acceleration control amount is smaller than the first acceleration control amount with respect to the amount of the acceleration operation.