POWER TRANSMISSION UNIT
First Claim
1. A power transmission unit, which has:
- an engine;
a plurality of speed change gear pairs, each of which has a different gear ratio, and to which a power outputted from the engine is transmitted; and
an output member for outputting the power transmitted from the speed change gear pair;
comprising;
a differential mechanism, which has three rotary elements to perform a differential action, and in which a first rotary element of the three rotary elements is connected with the engine; and
an electric motor, which is connected with a second rotary element of the three rotary elements; and
wherein the plurality of speed change gear pairs include a first gear pair which is adapted to be connected with the first rotary element and the output member, and a second gear pair which is adapted to be connected with a third rotary element of the three rotary elements and the output member.
1 Assignment
0 Petitions
Accused Products
Abstract
A power transmission unit, which includes: an engine; a plurality of speed change gear pairs, each of which has a different gear ratio, and to which a power outputted from the engine is transmitted; an output member outputting the power transmitted from any of the selected speed change gear pair; a differential mechanism, which has three rotary elements to perform a differential action, and in which a first rotary element of the three rotary elements is connected with the engine; and an electric motor, connected with a second rotary element of the three rotary elements; and wherein the plurality of speed change gear pairs include a first gear pair adapted to be connected with the first rotary element and the output member, and a second gear pair adapted to be connected with a third rotary element of the three rotary elements and the output member. The power transmission unit can reduce a power loss, and is downsized to be mounted on a vehicle easily.
-
Citations
23 Claims
-
1. A power transmission unit, which has:
- an engine;
a plurality of speed change gear pairs, each of which has a different gear ratio, and to which a power outputted from the engine is transmitted; and
an output member for outputting the power transmitted from the speed change gear pair;
comprising;a differential mechanism, which has three rotary elements to perform a differential action, and in which a first rotary element of the three rotary elements is connected with the engine; and an electric motor, which is connected with a second rotary element of the three rotary elements; and wherein the plurality of speed change gear pairs include a first gear pair which is adapted to be connected with the first rotary element and the output member, and a second gear pair which is adapted to be connected with a third rotary element of the three rotary elements and the output member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- an engine;
Specification