Method for controlling a hybrid vehicle during shift phases

Abstract

A method to control a hybrid vehicle provided with an internal combustion engine (2), which is supercharged by means of a turbocharger, a servo-assisted transmission (1) and a reversible electrical machine (14), which is provided to generate a torque (C) to be transmitted to the drive wheels which includes recognizing a gear shift; calculating an objective torque (C m_obj ) to be delivered to the drive wheels in the instant (t 1 ) in which the gear shift is recognized; controlling the reversible electrical machine (14) to supply to the drive wheels the objective torque (C m_obj ) in the instant (t 1 ) in which the gear shift is recognized until the instant (t 2 ) in which the condition is recognized in which the turbocharger is in the same efficiency point as the instant (t 1 ) in which an interruption in the transmission of the torque (C) to the drive wheels during a gear shift due to the opening position of the servo-assisted clutch (6) is recognized.

Description

technical field [0001] The invention relates to a method for controlling a hybrid vehicle with an internal combustion engine supercharged by a turbocharger during a gearshift phase. Background technique [0002] Hybrid vehicles are becoming increasingly common, and these vehicles include an internal combustion engine that transmits torque to drive wheels through a servo-assisted transmission having a servo-assisted mechanical gearbox and at least one electric machine electrically connected to an electric power storage system And mechanically connected to the drive wheel. [0003] Typically, an electric machine is reversible, i.e. operates as a motor by drawing electrical energy and producing mechanical work, or as a generator by drawing mechanical work and producing electrical energy, and is powered by a Electric actuation system to drive. Typically, an electric motor is splined to the countershaft of a servo-assisted mechanical gearbox and is driven to displace the intern...

AI Technical Summary

Problems solved by technology

In fact, in this case, the stream of air drawn in by the internal combustion engine during the shift phase is corrected to allow the shift (in particular, the amount of air drawn in by the internal combustion engine is reduced to allow the shift), with the effect that the turbocharger lacks some of the air it needs for optimal operation, thus creating a phenomenon known as "turbo lag", i.e. when an increase in torque is requested from low engine torque conditions (low RPM and low speed), due to the inertia of the turbine, A tendency for turbochargers to lack dynamic response

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