Patent ID: 11926218
Assignee: nan
Field: Transport (Mechanical engineering)
Classification: CPC B  F  Y | IPC B

Claim 0:
1. A plug-in hybrid powertrain comprising:
first, second, third and fourth planetary gearsets each having first element, second element and third element; six clutches; an internal combustion engine; an electrical machine; an output member; a ground member;
by selectively engaging the clutches, the plug-in hybrid powertrain provides nine torque transfer ratios from the internal combustion engine to the output member, four torque transfer ratios from the electrical machine to the output member, generator assisted launch modes for forward and reverse in internal combustion engine power only vehicle launch operations and an engine cranking mode;
the first planetary gearset has the following connections: the first element of the first planetary gearset has a clutch connection with the ground element; the second element of the first planetary gearset has a fixed connection with the first element of the fourth planetary gearset; and the third element of the first planetary gearset has a fixed connection with the third element of the second planetary gearset, a clutch connection with the ground element and another fixed connection with the electrical machine;
the second planetary gearset has the following connections: the first element of the second planetary gearset has a fixed connection with the third element of the third planetary gearset; the second element of the second planetary gearset has a clutch connection with the third element of the fourth planetary gearset and a clutch connection with the internal combustion engine; and the third element of the second planetary gearset has a fixed connection with the third element of the first planetary gearset;
the third planetary gearset has the following connections: the first element of the third planetary gearset has a fixed connection with the second element of the fourth planetary gearset; the second element of the third planetary gearset has two clutch connections with the first and the third elements of the fourth planetary gearset respectively; and the third element of the third planetary gearset has a fixed connection with the first element of the second planetary gearset;
the fourth planetary gearset has the following connections: the first element of the fourth planetary gearset has a fixed connection with the second element of the first planetary gearset and a clutch connection with the second element of the third planetary gearset; the second element of the fourth planetary gearset has a fixed connection with the first element of the third planetary gearset and another fixed connection with the output member; and the third element of the fourth planetary gearset has a clutch connection with the second element of the second planetary gearset and another clutch connection with the second element of the third planetary gearset.