Multi-mode Powertrain with Clutch-based Mode Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power train systems for work vehicles lack flexibility in transitioning between different transmission modes, such as mechanical-path, split-path, and CVP-only modes, leading to inefficiencies in power transmission due to energy losses in continuously variable power sources.
Innovation Solution
A power train system with a variator assembly and control assembly that includes multiple clutch devices and a planetary gear set, allowing for selection between three transmission modes by engaging and disengaging clutch devices to direct power from either the engine or continuously variable power sources to the output component, enabling efficient power transmission based on operational needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power is transmitted through continuously variable power sources (CVP), then power transmission flexibility is improved, but energy losses increase
Solution Approach 1:
The system dynamically switches between different power transmission modes (mechanical-path mode and CVP-only mode) based on operational conditions. The control assembly with multiple clutch devices enables the power train to transition from direct mechanical transmission to CVP transmission, optimizing the balance between flexibility and energy efficiency in real-time
2Productivity
If multiple transmission modes are available, then operational efficiency is improved, but device complexity increases
Solution Approach 1:
The control assembly is segmented into multiple independent clutch devices (first clutch device, second clutch device, third clutch device), each responsible for a specific power transmission path. This segmentation allows independent control of each transmission mode, simplifying the overall control logic while enabling multiple operational modes including mechanical-path mode, split-path mode, and CVP-only mode
Data Source
AI summary
A power train and related vehicle have a multi-mode power transmission with a first continuously variable power source (“CVP”) that may convert rotational power received by the engine for transmission to a second CVP. A variator assembly may receive rotational power from the second CVP at a first input and directly from the engine at a second input. A control assembly may include one or more output components and a plurality of clutch devices arranged between the one or more output components and the variator assembly and engine. In a first state of the control assembly, the plurality of clutch devices may collectively provide direct power transmission between the engine and the one or more output components. In a second state of the control assembly, the plurality of clutches may collectively provide power transmission between the variator and the one or more output components.