Hybrid drive system with two transmission gears

Abstract

The invention relates to a hybrid drive system (1) for a vehicle, in particular a motor vehicle, with an internal combustion engine (2), a first electric machine (3), a second electric machine (4) and a transmission, In particular a two-speed transmission, wherein the transmission has a first transmission input shaft (5) for connection to a first electric machine (3) and / or an internal combustion engine (2), a second transmission for connection to a second electric machine (4) Input shaft (6) and transmission output shaft (7) and shiftable first and second gears (I, II). The construction of the hybrid drive system is simplified and cost-effective in that the first transmission input shaft (5) and the second transmission input shaft (6) can be connected not only to the first gear (I) but also to the second gear Bit (II) is effectively coupled and can be effectively decoupled from it.

Description

technical field [0001] The invention relates to a hybrid drive system for a vehicle, in particular a motor vehicle, with an internal combustion engine, a first electric machine, a second electric machine and a transmission, in particular a two-speed transmission, wherein the transmission has a A first transmission input shaft for connection to a first electric machine and / or an internal combustion engine, a second transmission input shaft and a transmission output shaft for connection to a second electric machine, and a switchable first and second gear. Background technique [0002] Hybrid drive systems for vehicles, in particular motor vehicles, usually have an internal combustion engine and an electric machine. Some hybrid drive systems also have a combustion engine and two electric motors. In this case, one of the electric machines is primarily used, for example, as an electric motor drive for the vehicle, and the other electric machine is primarily used as a generator. ...

AI Technical Summary

Problems solved by technology

[0008] However, the hybrid drive systems known in the prior art have not been optimally designed

Hybrid drive systems known from the prior art often have either a high starting torque or a high final speed, since the electric motor usually has either a high torque or a high rotational speed, but rarely both at the same time

Furthermore, the hybrid drive systems known from the prior art, in particular their transmissions, usually have a complex and cost-intensive design

In the hybrid drive systems known from the prior art, when shifting from one gear to another and / or when advancing against high counterforces, for example when "driving uphill", high traction disturbance

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