Vehicle Control Device Torque Suppression During Steering
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Solution Overview
Problem
Existing vehicle control systems face controllability degradation when engine torque is reduced due to accelerator operations during vehicle posture control, leading to unintended vehicle behavior.
Innovation Solution
A vehicle control device that includes an engine control mechanism and control means to suppress engine torque reduction by controlling the engine torque during steering operations, specifically by prohibiting, delaying, or reducing the reduction speed and amount of engine torque when a driver reduces the accelerator opening, and by managing fuel cut control conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If vehicle posture control reduces engine torque during steering operations, then vehicle behavior stability is improved, but engine torque reduction due to accelerator operations cannot be suppressed
Solution Approach 1:
The control system dynamically adjusts engine torque based on the detected accelerator operation during vehicle posture control. When an accelerator operation is detected, the system modifies the torque reduction strategy to maintain controllability while still achieving desired vehicle behavior stability through coordinated control of multiple parameters.
Solution Approach 2:
The system changes control parameters by detecting accelerator operations and adjusting the engine torque control strategy accordingly. When accelerator operation is detected, the system modifies torque reduction amounts or rates to prevent unwanted torque changes while maintaining overall vehicle posture control effectiveness.
2Speed
If engine torque is reduced according to steering operation, then cornering response is improved, but driver's accelerator operation intent is not reflected
Solution Approach 1:
The control system incorporates feedback from accelerator operation detection to adjust engine torque control during steering. By monitoring accelerator operations and using this information to modify torque reduction strategies, the system ensures that driver intent is reflected in the final torque output while maintaining improved cornering response.
Solution Approach 2:
The system dynamically balances cornering response improvement with driver intent reflection by detecting accelerator operations and adjusting torque control in real-time. This dynamic adjustment allows the system to maintain fast cornering response while respecting the driver's operational intentions.
Data Source
AI summary
A vehicle control device includes an engine (10), an engine control mechanism that controls an engine torque, and a PCM (50) that performs vehicle posture control for generating vehicle deceleration by controlling the engine control mechanism to reduce the engine torque upon satisfaction of a condition that a vehicle is travelling and a steering angle-related value related to a steering angle of a steering device increases. When a driver performs an accelerator operation for reducing an accelerator opening during execution of vehicle posture control, the PCM (50) suppresses reduction of a generated torque of the engine due to the accelerator operation.