Power transmission unit with rotating electric machine

Abstract

The present invention provides a power transmission device with a rotary electric machine capable of reliably starting a cold state by connecting an internal combustion engine and a rotary electric machine without using a V-belt or a pulley. A power transmission device (5) disposed on a power transmission path from an output shaft (3) of an internal combustion engine (2) of a vehicle (1) to a transmission (4) includes a rotating electric machine (11) having a rotor (7 , 37), which is connected to the synchronous rotating member (6) which rotates synchronously with the output shaft of the internal combustion engine, and uses the central axis of the output shaft of the internal combustion engine as the rotating shaft (8); and the stator (10), which is relatively to the synchronous rotating member On the other hand, the fixed member (9, 9B, 9C) fixed to the non-rotating side faces the rotor with a first gap (12) therebetween.

Description

technical field [0001] The present invention relates to a power transmission device with a rotating electric machine that combines the power generation function and engine starting function of an alternator and a starter motor of a vehicle. Background technique [0002] Conventionally, as a power generation device for vehicles, such as Figure 19 As shown, there is known an alternator 105 connected via a V-belt 104 to a pulley 103 provided at a crankshaft end 102 of an internal combustion engine 101 . [0003] In addition, there are known functions of additionally driving the alternator 105, enabling the internal combustion engine to start when warmed up (after warming up) (see ISG in Patent Documents 1 to 3), and assisting the driving force when the vehicle is running. device etc. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent No. 4782348 [0007] Patent Document 2: Japanese Patent No. 4787242 [0008] Patent Documen...

AI Technical Summary

Problems solved by technology

[0009] However, in the above-mentioned internal combustion engine starting method, it is sometimes impossible to start the cold state.

The main reasons include: in the cold state, the viscosity of the lubricating oil increases due to the temperature drop of the lubricating oil of the internal combustion engine, so that the stirring resistance at the time of starting increases, and the friction coefficient between the V-belt 104 and the pulley 103 decreases, As a result, slippage occurs between the V-belt 104 and the pulley 103, so that the rotational driving force of the alternator 105 cannot be transmitted to the internal combustion engine 101, etc.

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