Hybrid multi-mode switching continuously variable transmission system

Patent metadata

Field	Value
Publication number	US-11543009-B2
Application number	US-201916627690-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Jan 16, 2019
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A continuously variable transmission system for hybrid power multi-mode switching, includes an input component, an output component, a clutch assembly, a brake, a hydraulic transmission assembly and a planetary gear assembly, wherein the input component is connected with the hydraulic transmission assembly, the output component is connected with the planetary gear assembly, the clutch assembly connects the input component and the hydraulic transmission assembly to the planetary gear assembly respectively, and the brake and the clutch assembly provide a transmission ratio for continuous forwarding or backwarding continuously between the input component and the output component. The hydro-mechanical transmission is switched to mechanical transmission by increasing the displacement ratio of the hydraulic transmission assembly linearly or non-linearly.

First claim

The invention claimed is:

1. A hybrid multi-mode switching continuously variable transmission system, said system comprising an input component, an output component, a clutch assembly, a brake, a hydraulic transmission assembly and a planetary gear assembly, wherein the input component is connected with the hydraulic transmission assembly, the output component is connected with the planetary gear assembly, the clutch assembly connects the input component and the hydraulic transmission assembly to the planetary gear assembly and the brake and the clutch assembly provide a stepped forward or backward transmission ratio between the input component and the output component, wherein a hydraulic transmission mode, a mechanical transmission mode, a hydro-mechanical transmission mode, and a reverse hydraulic transmission mode are provided between the input component and the output component by adjusting a displacement ratio of the hydraulic transmission assembly and selectively controlling an engagement between the clutch assembly and the brake, and
wherein the planetary gear assembly comprises a planetary gear split mechanism and a planetary gear convergence mechanism; the clutch assembly comprises a first clutch, a second clutch, and a third clutch; a gear ring of the planetary gear split mechanism is connected with a sun gear of the planetary gear convergence mechanism;
the first clutch is configured to selectively connect the gear ring of the planetary gear split mechanism to a planet carrier of the planetary gear split mechanism to rotate together; the second clutch is configured to selectively connect the sun gear of the planetary gear convergence mechanism to a planet carrier of the planetary gear convergence mechanism to rotate together; the third clutch is configured to selectively connect the hydraulic transmission assembly to the planetary gear convergence mechanism to rotate together; and the hydro-mechanical transmission mode between the input component and the output component is provided by adjusting the displacement ratio of the hydraulic transmission assembly and selectively controlling the engagement of the first clutch, the second clutch and the third clutch.

2. The hybrid multi-mode switching continuously variable transmission system according to claim 1 , wherein switching of the hydraulic transmission mode, the hydro-mechanical transmission mode, and the mechanical transmission mode between the input component and the output component are realized by adjusting the displacement ratio of the hydraulic transmission assembly.

3. The hybrid multi-mode switching continuously variable transmission system according to claim 2 , wherein switching of the hydraulic transmission mode, the hydro-mechanical transmission mode, and the mechanical transmission mode between the input component and the output component comprises:
switching from the hydraulic transmission mode to the hydro-mechanical transmission mode by increasing the displacement ratio of the hydraulic transmission assembly linearly; on the basis of the hydro-mechanical transmission, switching from the hydro-mechanical transmission mode to the mechanical transmission mode by increasing the displacement ratio of the hydraulic transmission assembly linearly or non-linearly.

4. The hybrid multi-mode switching continuously variable transmission system according to claim 1 , wherein the mechanical transmission mode between the input component and the output component is provided by adjusting the displacement ratio of the hydraulic transmission assembly and selectively controlling the engagement of the first clutch and the second clutch.

5. The hybrid multi-mode switching continuously variable transmission system according to claim 1 , wherein the clutch assembly further comprises a fourth clutch configured to selectively connect the hydraulic transmission assembly to the output component to rotate together; the brake is configured to selectively connect the gear ring of the planetary gear split mechanism to a fixed part; the hydraulic transmission mode or the reverse hydraulic transmission mode between the input component and the output component is provided by adjusting the displacement ratio of the hydraulic transmission assembly and controlling the engagement of the fourth clutch and the brake.

6. The hybrid multi-mode switching continuously variable transmission system according to claim 1 , wherein the hydro-mechanical transmission mode is an output splitting hydro-mechanical transmission mode between the input component and the output component, and is provided by engaging the first clutch and the third clutch, and further including an input splitting hydro-mechanical transmission mode between the input component and the output component provided by engaging the second clutch and the third clutch.

Assignees

• Univ Jiangsu

Inventors

• Zhu Zhen
• Cai Yingfeng
• Chen Long
• Xia Changgao
• Han Jiangyi
• Shi Dehua
• Wang Feng
• Yuan Chaochun
• Pan Chaofeng
• Xu Xing

Classifications

• F16H47/04 Primary

  the mechanical gearing being of the type with members having orbital motion · CPC title

• F16H2037/101

  Power-split transmissions with one differential at each end of a continuously variable transmission, i.e. CVT · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title