Hybrid Powertrain Gear Layout for Fewer Shifts and Higher Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hybrid transmissions face issues with low shifting quality, high software control difficulty, limited torque-increasing space, and high production costs due to dual-motor arrangement, which affects fuel efficiency and design complexity.
Innovation Solution
A hybrid drive system with a novel arrangement of shafts, gears, and motors, including a first and second motor connected to different shafts, synchronization mechanisms, and differential mechanisms, allowing for 15 operational modes, including all-electric and hybrid drives, to optimize engine operation and reduce gear shifting frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large-displacement engine is used to ensure sufficient power output, then power is improved, but fuel economy deteriorates
Solution Approach 1:
The power generation task is segmented between two power sources: the large-displacement engine and the small-displacement engine. The control system divides the operating range such that the large-displacement engine operates at high power output while the small-displacement engine supplements at low speeds and high speeds, ensuring both power requirements and fuel economy are met
2Use of energy by moving object
If a small-displacement engine is used to improve fuel economy, then fuel economy is improved, but power output deteriorates
Solution Approach 1:
The patent merges two engine systems into a hybrid power generation system. The small-displacement engine provides base power for fuel efficiency, while the large-displacement engine is activated when high power is needed, combining the advantages of both engine types to achieve both fuel economy and sufficient power output
3Ease of operation
If dual clutch structure is used to enable simultaneous engagement of two clutches, then ease of operation is improved, but device complexity deteriorates
Solution Approach 1:
The patent introduces a control system as an intermediary that manages the dual clutch operations. The control system receives signals from various sensors and automatically controls the engagement and disengagement of the first and second clutches, eliminating the need for complex manual operation while maintaining systematic control over the hybrid power transmission
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
The system improves transmission performance, reduces production difficulty and costs, enhances fuel efficiency, and extends battery life by continuous power generation and adjustable motor speed, enabling various drive modes for optimal fuel consumption.
Implementation Method 1
a first clutch disposed between the first power generation system and the transmission system... the first clutch is in an engaged state... torque transmission
Implementation Method 2
a second clutch disposed between the second power generation system and the transmission system... the second clutch is in an engaged state... torque transmission
Implementation Method 3
an exhaust manifold of the first power generation system... exhaust gases flow... backpressure
Implementation Method 4
a resonance chamber... configured to reduce exhaust backpressure... acoustic resonance to enhance exhaust gas flow
Data Source
Figure 1~2
AI summary
The present invention belongs to the technical field of vehicles, and discloses a hybrid drive system and a hybrid vehicle. The hybrid drive system includes an engine; a first synchronization mechanism selectively abuts against a first gear pair and a second gear pair; a second synchronization mechanism selectively abuts against a third gear pair and a fifth gear pair, so as to convert rotation of a fifth shaft into rotation of a third shaft; a third synchronization mechanism is configured to selectively abut against a fourth gear pair; a first differential mechanism is connected to the third shaft and drives, by a first drive shaft, rear wheels to rotate; a second differential mechanism is connected to a sixth shaft and drives, by a second drive shaft, front wheels to rotate; and the engine drives, by a first shaft, a second shaft to rotate for power generation by a first motor, and the first motor can transfer stored electric energy to a second motor, so as to cause the second motor to drive the fifth shaft to rotate. The hybrid drive system solves the problems of transmission performance and reliability caused by frequent gear shifting, and reduces machining difficulty.