Electrically Driven Charging Device Control for Boost Pressure
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Solution Overview
Problem
Existing methods for controlling electrically powered loading devices in combustion engines, such as EAV and EUATL, fail to account for various boundary conditions like battery charging status, component temperatures, and recuperation status, leading to suboptimal dynamic behavior and potential torque breakdowns.
Innovation Solution
A procedure that determines a reduction factor for the drive criterion of the electrically powered loading device within a balance sheet period, considering factors like electrical energy availability, battery charging status, component temperatures, and recuperative energy, to ensure continuous and adaptive dynamic support without sudden changes in operating behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrically driven charging devices are used to improve dynamic support and boost pressure, then engine torque and acceleration response are improved, but control complexity increases due to multiple boundary conditions
Solution Approach 1:
The patent applies parameter changes by continuously adjusting the drive criterion of the electrically driven charging device based on multiple boundary conditions. The control device modifies operational parameters (such as power output, speed, or torque) in response to changing states of battery charge, component temperatures, and recuperation status, thereby optimizing engine torque while managing system complexity through adaptive parameter tuning
Solution Approach 2:
The patent implements feedback control by continuously monitoring boundary conditions (battery state of charge, component temperatures, recuperation status) and using this information to adjust the drive criterion of the charging device. This closed-loop feedback mechanism enables the system to maintain optimal performance while automatically adapting to changing operational conditions, resolving the contradiction between improved torque and control complexity
2Reliability
If drive criterion is reduced to account for boundary conditions, then reliable operation is maintained, but dynamic support performance deteriorates
Solution Approach 1:
The patent applies dynamics by making the drive criterion adaptive rather than static. The control device continuously adjusts the drive criterion based on real-time boundary conditions, allowing the system to operate at maximum power when conditions permit while automatically reducing power when boundary conditions require it. This dynamic adjustment maintains operational reliability without permanently sacrificing dynamic support performance
Solution Approach 2:
The patent changes operational parameters dynamically based on boundary conditions. When battery charge is sufficient, temperatures are acceptable, and recuperation status is favorable, the drive criterion allows maximum power output for optimal dynamic support. When boundary conditions deteriorate, the parameter changes to reduce power output, maintaining reliability while minimizing performance loss
3Speed
If maximum power is used for e-boosting, then acceleration response is improved, but energy consumption increases beyond available electrical energy
Solution Approach 1:
The patent uses feedback control to monitor the balance between electrical energy consumption and available electrical energy. The control device continuously compares energy usage against battery state of charge, recuperation status, and other boundary conditions, adjusting the drive criterion to ensure acceleration response is optimized without depleting available electrical energy reserves
Solution Approach 2:
The patent implements self-service through recuperation, where the system recovers electrical energy during deceleration or braking and makes it available for e-boosting operations. This creates a self-sustaining energy cycle where the system serves its own energy needs, reducing the net energy consumption from external sources while maintaining acceleration performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient and adaptive control of electrically powered loading devices, ensuring consumption-neutral operation, preventing sudden changes in torque and improving driving experience by accounting for multiple boundary conditions and utilizing recuperative energy effectively.
Implementation Method 1
a supercharging system comprising an exhaust gas turbocharger and an electrically driven charging device for building up boost pressure
Implementation Method 2
They are typically driven by an electric motor at a speed-controlled rate
Implementation Method 3
the rotor assembly of the exhaust gas turbocharger can be additionally accelerated in a torque-controlled manner using a controllable electric drive
Data Source
Figure 1~2
Figure 1
Figure 3~4
AI summary
The invention relates to a method for operating an internal combustion engine (1) with a charging system (2) comprising an exhaust gas turbocharger (3) and an electrically driven charging device (3, 7; 19) for dynamic support during the build-up of boost pressure (p2), comprising: determining a drive criterion (M; n; I; V) of the charging device ((3, 7; 19)); defining an output variable (MeuATL; nEAv) of the drive criterion; continuously determining a reduction factor (XEco) of the drive criterion within a balance period (tv1); applying the reduction factor (fthermo; fSoC; fTemp; XEco) to the output variable (MeuATL; nEAv) the drive criterion and operating the charging device (3, 7; 19) with the output variable reduced by the reduction factor (fthermo; fSoC; fTemp; XEco). Drive criterion (Msoll, euATL; nsoll, EAV).