Hybrid Torque Control Slope Adjustment for Smooth Power Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hybrid power systems experience sudden changes in power source targets due to rapid driver demands, affecting torque transfer to the wheel end and compromising driving smoothness and power requirements.
Innovation Solution
A torque control method that couples power source torque and rotational-speed responses with driver demands using design algorithms, adjusting change slopes to ensure gentle transitions in series and parallel modes, and compensating for engine torque differences with generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power source target changes rapidly to meet driver demand, then power responsiveness is improved, but driving smoothness deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of torque change slopes based on driving conditions. The control system continuously monitors driver demand and adjusts the torque change rate of power sources accordingly, transitioning between rapid response mode and smooth transition mode. This dynamic control strategy resolves the contradiction by making the system adaptable to different driving scenarios rather than using a fixed response characteristic.
Solution Approach 2:
The patent changes the parameter of torque change slope dynamically based on driving demand. When driver demand changes are small, a smaller torque change slope is applied to maintain smoothness. When driver demand changes are large, a larger torque change slope is applied to ensure power responsiveness. This parameter adjustment strategy directly addresses the technical contradiction by modifying system behavior based on operating conditions.
2Stability of the object's composition
If power source target changes slowly to maintain driving smoothness, then driving smoothness is improved, but power responsiveness deteriorates
Solution Approach 1:
The control system dynamically switches between smooth transition mode and rapid response mode based on the magnitude of driver demand changes. When a sudden large demand is detected, the system transitions to rapid response mode with larger torque change slopes, ensuring power is delivered quickly while still maintaining acceptable smoothness for the given situation.
Solution Approach 2:
The patent adjusts the torque change slope parameter based on driving demand magnitude. For small driver demand changes, a conservative small torque change slope is used to prioritize smoothness. For large driver demand changes, an aggressive large torque change slope is used to prioritize power responsiveness. This conditional parameter adjustment resolves the contradiction by matching system behavior to driving needs.
3Productivity
If torque change slope is increased to meet driver demand quickly, then power responsiveness is improved, but driving smoothness deteriorates
Solution Approach 1:
The patent implements conditional adjustment of torque change slope based on driving demand characteristics. The control system evaluates the magnitude of driver demand change and selects appropriate torque change slope values accordingly. This conditional parameter change strategy allows the system to achieve high power delivery speed when needed while maintaining driving smoothness during normal operation.
Solution Approach 2:
The control system dynamically adapts torque change slope to match driving conditions rather than using a fixed value. This dynamic adjustment allows the system to be aggressive when power responsiveness is critical and conservative when smoothness is prioritized, effectively resolving the contradiction between productivity and stability.
4Stability of the object's composition
If torque change slope is decreased to maintain driving smoothness, then driving smoothness is improved, but power responsiveness deteriorates
Solution Approach 1:
The patent adjusts torque change slope parameter based on real-time driving demand assessment. When driver demand changes are detected to be large, the system increases the torque change slope to ensure adequate power delivery speed. When driver demand changes are small, the system decreases the torque change slope to prioritize smoothness. This conditional parameter adjustment resolves the contradiction adaptively.
Solution Approach 2:
The control system employs dynamic torque change slope adjustment that responds to driving conditions. This dynamic behavior allows the system to switch between smooth operation and rapid power delivery as needed, effectively resolving the contradiction between maintaining smoothness and delivering power quickly when required.
Data Source
Figure 1
Figure 2~3-1
Figure 4~3-2
AI summary
The present invention relates to a torque control method and apparatus for a hybrid power system, a vehicle, a device, and a medium. The method includes: when a driving mode of the hybrid power system is a series mode, determining a torque change slope range of an engine and a rotational-speed change slope range of a generator according to a driving demand power change determined by driving wheel end demand torque, and controlling torque of the engine and a rotational-speed of the generator to change according to corresponding change slope ranges that have been adjusted, so that actual torque of the engine and an actual rotational-speed of the generator change gently to respective targets thereof; and when the driving mode of the hybrid power system is a parallel mode, determining a torque change slope range of a driving motor according to a driving demand torque change determined by the driving wheel end demand torque, and controlling torque of the driving motor to change according to a corresponding change slope range that has been adjusted, so that actual torque of the driving motor changes gently to a target thereof.