Dual-Mode Throttle Control for Vibration-Free Acceleration
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Solution Overview
Problem
Existing acceleration control methods using throttle valves in vehicles face challenges in achieving rapid response while maintaining stability, leading to excessive vibration and unstable engine power, particularly during low engine conditions or idling.
Innovation Solution
The proposed method involves an acceleration control system that dualizes throttle response by monitoring driving conditions and detecting accelerator pedal signal changes, switching between two modes: a second throttle response mode for rapid acceleration and a first throttle response mode for stability, using distinct parameters to adjust throttle opening, delay time, air regulator control speed, and filtering time constants based on intake manifold pressure and driver intent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the throttle valve opening speed is increased to achieve rapid acceleration response, then acceleration response is improved, but throttle valve vibration increases causing unstable engine power
Solution Approach 1:
The patent implements dynamic switching between two throttle response modes (first mode for stability, second mode for rapid response) based on real-time driving conditions and APS change rates. The ECU dynamically adjusts throttle control parameters including opening speed, delay time, and filtering time constants according to the detected acceleration demand and current engine state, allowing the system to adapt its behavior to match actual driving requirements.
Solution Approach 2:
The patent changes multiple control parameters simultaneously to resolve the contradiction: (1) switching between two distinct throttle response modes, (2) adjusting throttle opening speed parameters, (3) modifying delay time parameters, (4) changing filtering time constants. These parameter changes allow the system to achieve rapid response when needed while maintaining stability during normal operation.
2Productivity
If the throttle valve responds rapidly to accelerator pedal changes, then acceleration control performance is improved, but excessive vibration occurs during idle or low acceleration conditions
Solution Approach 1:
The system dynamically determines whether to apply rapid response control based on real-time monitoring of APS change rates and driving conditions. When the APS change rate exceeds a threshold indicating genuine acceleration demand, the second throttle response mode is activated. Otherwise, the first mode maintains stable operation by limiting throttle response speed, thereby preventing vibration during idle or low-demand conditions.
Solution Approach 2:
The patent applies different throttle control characteristics to different operating conditions: rapid response parameters are applied locally when acceleration demand is detected, while stability parameters are applied during normal operation. This localized application of control strategies ensures rapid response only where needed without causing vibration in other operating states.
3Device complexity
If a single throttle response parameter is used for all conditions, then system complexity is reduced, but both rapid response and stability cannot be satisfied simultaneously
Solution Approach 1:
The patent segments the throttle control system into two distinct response modes (first mode for stability, second mode for rapid response), each with its own set of parameters. The ECU switches between these segmented modes based on detected driving conditions and APS change rates, allowing the system to maintain both simplicity through standardized modes and adaptability through conditional switching.
Solution Approach 2:
The dual-mode throttle control system serves multiple functions: it provides rapid acceleration response when needed, maintains stability during normal operation, prevents excessive vibration during idle, and adapts to various driving conditions. This multi-functionality is achieved through a single control system that can operate in two distinct modes, eliminating the need for separate hardware systems.
Data Source
AI summary
An acceleration control method through throttle dualization may include detecting a signal of an accelerator pedal scope (APS) by pressing of an accelerator pedal while a vehicle travels determines, by an electronic controller, whether the APS is rapidly changed, performing a first throttle response mode in which acceleration control is performed using a current intake manifold pressure when the APS is not determined to be rapidly changed, and performing a second throttle response mode in which acceleration control is performed using a target intake manifold pressure when the APS is determined to be rapidly changed.