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Control method for forcibly at least partially closing an exhaust valve of a turbocharged engine

A turbocharger, part of the technology, used in engine control, electrical control, combustion engines, etc., can solve problems that are not specified and do not involve energy conservation, etc.

Active Publication Date: 2020-12-01
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document does not deal with the conservation of the energy of the exhaust gases in the turbocharger, and it does not explain how to do this

Method used

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  • Control method for forcibly at least partially closing an exhaust valve of a turbocharged engine
  • Control method for forcibly at least partially closing an exhaust valve of a turbocharged engine
  • Control method for forcibly at least partially closing an exhaust valve of a turbocharged engine

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Embodiment Construction

[0041] The object of the invention is that, during the deceleration of the motor vehicle caused by the driver's foot lifting from the accelerator pedal, this foot lifting is recognized as suitable for implementing the control method of the exhaust valve according to the invention, by forcing the exhaust valve to be at least partially closed The exhaust valve is kept at least partially closed according to the request, whereas according to the prior art the exhaust valve should be open under such conditions.

[0042] To this end, a control method forcibly at least partially closing an exhaust valve of a turbocharger of a heat engine of a motor vehicle performs a holding of the at least partially closed exhaust valve after detection and identification of prevailing driving situations suitable for such closing. The control method according to the invention employs three steps to perform this maintenance of the closed exhaust valve.

[0043] The first condition is the detection of ...

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PUM

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Abstract

The invention relates to a method for instructing the at least partial forced closure of a dump valve of a turbocharger of an engine, with detection of throttle release (5a, 5b, 5c) by the driver and classification between partial throttle releases lower than a release threshold for which the instruction is not carried out, and partial throttle releases (5a) higher than said threshold and full throttle releases (5b, 5c) for which the instruction is carried out, with, for the partial and full throttle releases (5a, 5b, 5c), cancellation of the instruction after a time lapse without acceleration and, for full throttle releases (5b) directly followed by an acceleration, cancellation of the instruction when the boost pressure set point is higher than a set point threshold.

Description

technical field [0001] The invention relates to an engine assembly for a motor vehicle comprising an internal combustion engine associated with at least one turbocharger having an exhaust valve. More specifically, the invention relates to a control method for forcibly closing, at least partially, the exhaust valve of a turbocharger of a heat engine of a motor vehicle after detection of a driving situation in which it is desirable to close the exhaust valve, thereby saving the turbocharger. The energy recovered by the supercharger from the exhaust gas. Background technique [0002] This driving situation occurs quite often: a motor vehicle slows down when the driver lifts his foot off the accelerator pedal. The detection step of the control method according to the invention allows to distinguish between different foot lifts from the accelerator pedal and, for certain classes of foot lifts identified, to keep at least partially closed the exhaust valve of the turbocharger, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D33/02F02B37/12F02D41/12F02D41/04F02D41/10
CPCF02B37/12F02B37/18F02D41/0005F02D41/0007F02D41/045F02D41/10F02D2200/0406F02D2200/602F02D2250/22Y02T10/12Y02T10/40
Inventor 阿里·阿赤瑞萨姆尔·特拉韦尔特
Owner PEZHO SITROEN AUTOMOBILS SA