Electronic Control Unit Dynamic Acceleration Correction
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Solution Overview
Problem
Conventional electronic control units for vehicle speed cannot increase vehicle speed beyond a reference speed, even when a driver desires higher acceleration, due to increased traveling resistance from factors like weight and road slope, limiting the attainment of desired acceleration.
Innovation Solution
An electronic control unit comprising a basic physical quantity calculation part, history storage, estimated value calculation, comparison, correction value calculation, and driving control parts, which calculates and adjusts fuel injection or throttle settings based on actual and estimated vehicle speed and acceleration values to achieve desired acceleration, accounting for changes in resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the conventional apparatus controls the vehicle speed to return to the reference vehicle speed when the vehicle speed deviates from the reference speed by a predetermined value, then the vehicle speed is stabilized at the reference speed, but the vehicle cannot increase speed beyond the reference speed even when the driver desires higher acceleration
Solution Approach 1:
The control apparatus continuously monitors actual vehicle speed and acceleration, compares them with estimated values based on historical data, and dynamically adjusts the target vehicle speed. This feedback mechanism allows the system to adapt to changing driving conditions and driver intentions, enabling speed increases beyond the fixed reference speed when acceleration is desired.
Solution Approach 2:
The patent transforms the static reference speed concept into a dynamic target speed that evolves based on historical driving patterns and current conditions. By using time-series data and estimation algorithms, the system creates an adaptive speed profile that can increase or decrease the target speed flexibly, rather than rigidly maintaining a fixed reference value.
2Stability of the object's composition
If the vehicle receives traveling resistances such as air resistance, rolling resistance and slope resistance, then the vehicle stability is maintained, but the traveling resistance increases when the weight of the vehicle increases or the vehicle enters an uphill slope from a level road, impeding acceleration
Solution Approach 1:
The system performs preliminary analysis of historical driving data to estimate future vehicle behavior and anticipate resistance changes. By pre-calculating expected speed and acceleration patterns based on past performance, the system can proactively adjust the target speed before resistance becomes a limiting factor, maintaining acceleration capability despite increasing travel resistances.
3Reliability
If the conventional apparatus stores as a reference vehicle speed a vehicle speed when an accelerator operation angle and a vehicle speed are both constant for a predetermined period, then the reference speed is established, but the reference speed cannot be increased even when the driver desires a higher vehicle speed
Solution Approach 1:
The patent converts the static reference speed into a dynamic target speed that continuously adapts based on historical driving patterns. By analyzing time-series data of accelerator operations and vehicle responses, the system generates an evolving speed profile that maintains reliability through data-driven estimation while gaining flexibility to adjust to driver preferences and changing conditions.
Solution Approach 2:
The system changes the fundamental parameter from a fixed reference speed value to a dynamically calculated target speed based on multiple variables including historical data, current accelerator position, and estimated vehicle state. This parameter transformation enables both reliability (through consistent data-based calculations) and flexibility (through adaptive adjustments).
Data Source
AI summary
In an electronic control unit, a basic injection quantity calculation part calculates a basic injection quantity value as a target of fuel value, which an injector injects, by using an actual accelerator operation angle value, an actual engine rotation speed value and at least one of an actual vehicle speed value and an actual acceleration value. When the actual vehicle speed value or the acceleration value deviates largely from the estimated value, a correction value calculation part calculates an injection quantity correction value for the basic injection quantity value and a final injection quantity calculation part calculates a final injection quantity value by correcting the basic injection quantity value with the correction value. A driving control part controls driving of the injector so that the injector injects fuel of the final injection quantity value determined by correcting the basic injection quantity value with the correction value.