Hybrid driving system and hybrid electric vehicle

A hybrid driving system, comprises:

• an engine;
• an input element;
• an output element;
• a box body;
• a first motor and a second motor;
• a first planet row, a second planet row and a third planet row, wherein the first planet row comprises a first sun gear, a first planet gear, a first gear ring and a first planet carrier, the first sun gear is in external meshing transmission with the first planet gear, the first planet gear is in internal meshing transmission with the first gear ring, and the first planet gear is rotatably supported on the first planet carrier;
• the second planet row comprises a second sun gear, a second planet gear, a second gear ring and a second planet carrier, the second sun gear is in external meshing transmission with the second planet gear, the second planet gear is in internal meshing transmission with the second gear ring, and the second planet gear is rotatably supported on the second planet carrier;
• the third planet row comprises a third sun gear, a third planet gear, a third gear ring and a third planet carrier, the third sun gear is in external meshing transmission with the third planet gear, the third planet gear is in internal meshing transmission with the third gear ring, and the third planet gear is rotatably supported on the third planet carrier;
• and the first sun gear and the second gear ring are both connected to the second motor, the first planet carrier is fixedly connected to the second sun gear, the second planet carrier is fixedly connected to the third gear ring, the input element is connected between the engine and the third planet carrier, and the output element is connected to the first planet carrier;
• and
• a first clutch, a second clutch, a fourth clutch, a first brake and a second brake, wherein the first gear ring is connected to the third sun gear through the first clutch, the second clutch is connected between any two of the third sun gear, the third planet carrier and the third gear ring, the first gear ring is connected to the box body through the first brake, the second gear ring is connected to the box body through the second brake, and the third sun gear is connected to the first motor through the fourth clutch.

A hybrid electric vehicle, comprising:

• a hybrid driving system, comprising:
• an engine;
• an input element;
• an output element;
• a box body;
• a first motor and a second motor;
• a first planet row, a second planet row and a third planet row, wherein the first planet row comprises a first sun gear, a first planet gear, a first gear ring and a first planet carrier, the first sun gear is in external meshing transmission with the first planet gear, the first planet gear is in internal meshing transmission with the first gear ring, and the first planet gear is rotatably supported on the first planet carrier;
• the second planet row comprises a second sun gear, a second planet gear, a second gear ring and a second planet carrier, the second sun gear is in external meshing transmission with the second planet gear, the second planet gear is in internal meshing transmission with the second gear ring, and the second planet gear is rotatably supported on the second planet carrier;
• the third planet row comprises a third sun gear, a third planet gear, a third gear ring and a third planet carrier, the third sun gear is in external meshing transmission with the third planet gear, the third planet gear is in internal meshing transmission with the third gear ring, and the third planet gear is rotatably supported on the third planet carrier;
• and the first sun gear and the second gear ring are both connected to the second motor, the first planet carrier is fixedly connected to the second sun gear, the second planet carrier is fixedly connected to the third gear ring, the third sun gear is connected to the first motor, the input element is connected between the engine and the third planet carrier, and the output element is connected to the first planet carrier;
• and
• a first clutch and a first brake, wherein the first gear ring is connected to the third sun gear through the first clutch, and the first gear ring is connected to the box body through the first brake.