Hybrid power unit control system

Abstract

Disclosed is a means to attenuate torsional vibration in a power unit transmission system generated by torque fluctuations in the engine in an automotive hybrid power unit, and thereby eliminate noise, such as chattering from the power transmission gears and muffled body noise, etc. Disclosed is a hybrid power unit control system for a hybrid power unit that is equipped with a first drive train, which is configured with a gear transmission mechanism linked to a first input shaft that transmits engine drive power via a first friction clutch; a second drive train, which is configured with a gear transmission mechanism linked to a second input shaft that transmits engine drive power via a second friction clutch; a motor generator, which is connected to said first input shaft or second input shaft; and a driven apparatus, which is driven by the drive power transmitted from the output shaft of the gear transmission mechanism of said first drive train or the output shaft of the gear transmission mechanism of said second drive train. Said motor generator is started as an electric power generator when fluctuation in the rotational speed of said engine, which is detected by a rotational speed sensor, exceeds a predetermined upper limit amplitude value, so that torque of opposite phase to said rotational speed fluctuation is applied to said engine with the same periodicity as said rotational speed fluctuation.

Description

technical field [0001] The present invention relates to a hybrid power device suitable for a transmission of a hybrid vehicle, in particular to a control system for a hybrid power device suitable for a dual-clutch transmission. Background technique [0002] Japanese Patent Application Laid-Open No. 2005-186931 discloses a hybrid device employing such a dual clutch. The hybrid device has a first input shaft and a second input shaft which are coaxially arranged and can rotate relative to each other and selectively transmit the driving force of the engine through a dual clutch, and are respectively installed on the first output shaft arranged in parallel with the two input shafts. The first gear transmission mechanism and the second gear transmission mechanism on the shaft and the second output shaft, and the driving wheel connected to the second output shaft and connected to the second output shaft as an electric motor to drive the first output shaft or the second output shaft...

AI Technical Summary

Problems solved by technology

[0004] In the above vehicle hybrid device, when torsional vibrations are generated in the drive force transmission shaft system due to changes in the torque of the engine, there may be cases where the power transmission gear rattles or rattles the power transmission gear due to an excessive change in the rotational speed of the engine. Noise such as cavity noise of the car body

In the past, mass dampers were installed in rotating parts such as clutches in order to suppress the occurrence of the above-mentioned torsional vibrations, but this led to problems of increased weight and increased manufacturing costs

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