US 9,321,344 B2 · Transmission system of hybrid electric vehicle

Abstract

A transmission system of a hybrid electric vehicle may include two shafts, two hollow shafts and two motor/generators. A first shaft connected to an engine. A first hollow shaft disposed without rotational interference with the first shaft, selectively connected to the first shaft, and provided with a first output gear. A second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear. A second shaft disposed in parallel with the first shaft and operably connected to the first shaft and the first hollow shaft through a gear unit to selectively transmit torque of the first shaft to the first hollow shaft. Clutches may connect the first shaft and the second shaft selectively to the first hollow shaft. A first motor/generator operably connected to the second hollow shaft and a second motor/generator operably connected to the second shaft.

Claims16

Dependent claims

A transmission system of a hybrid electric vehicle comprising:

a first shaft connected to an engine and provided with a first externally-meshing drive gear fixedly disposed thereon;
a first hollow shaft disposed without rotational interference with the first shaft, selectively connected to the first shaft through a first clutch, and provided with a first output gear;
a second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear;
a second shaft disposed in parallel with the first shaft and provided with a first externally-meshing driven gear fixedly disposed on the second shaft and engaged with the first externally-meshing drive gear and a second externally-meshing drive gear fixedly disposed on the second shaft;
a second externally-meshing driven gear engaged with the second externally-meshing drive gear and selectively connected to the first hollow shaft through a second clutch;
a first motor/generator directly and operably connected to the second hollow shaft;
and
a second motor/generator directly and operably connected to the second shaft.

5 more elements

A transmission system of a hybrid electric vehicle comprising:

a first shaft connected to an engine and provided with a first externally-meshing drive gear fixedly disposed thereon;
a first hollow shaft disposed without rotational interference with the first shaft and selectively and operably connected to the first shaft through a first clutch, and provided with a first output gear;
a second hollow shaft disposed without rotational interference with the first hollow shaft and provided with a second output gear fixedly disposed thereon;
a second shaft disposed in parallel with the first shaft and provided with a first externally-meshing driven gear fixedly disposed on the second shaft and engaged with the first externally-meshing drive gear and a second externally-meshing drive gear fixedly disposed on the second shaft;
a second externally-meshing driven gear engaged with the second externally-meshing drive gear and selectively connected to the first hollow shaft through a second clutch;
a first motor/generator directly and operably connected to the second hollow shaft;
and
a second motor/generator directly and operably connected to the second shaft.

5 more elements

Dependencies are inferred from the claim text.

Transmission system of hybrid electric vehicle

Life of this patent

Transmission system of hybrid electric vehicle

Life of this patent

Abstract

Claims16