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Method for estimating the mass of air contained in a combustion chamber of a variable valve heat engine cylinder of a motor vehicle

A heat engine, motor vehicle technology, applied in the direction of machine/engine, combustion engine, engine control, etc., can solve problems such as estimation not shown, and achieve the effect of improving operation

Active Publication Date: 2020-04-17
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, this document does not show an estimation of the mass of air taken in from the position of the variable valve actuator, which is corrected with respect to the current position of frequent use

Method used

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  • Method for estimating the mass of air contained in a combustion chamber of a variable valve heat engine cylinder of a motor vehicle
  • Method for estimating the mass of air contained in a combustion chamber of a variable valve heat engine cylinder of a motor vehicle
  • Method for estimating the mass of air contained in a combustion chamber of a variable valve heat engine cylinder of a motor vehicle

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Embodiment Construction

[0035] It should be noted that the drawings are given as examples and do not limit the invention.

[0036] The invention will now be described in the preferred but non-limiting context of a heat engine with indirect fuel injection. Such an engine comprises at least one cylinder with a piston inside, the cylinder defining a combustion chamber. Fuel injectors are provided in the ducts to inject fuel into the fresh air entering the combustion chamber. Thus, fresh air / fuel mixing begins to take place within the intake duct.

[0037] The intake duct for fresh air leads to the combustion chamber through the intake valve inlet, which has an inlet movable between a closed position, which hermetically closes the intake port, and an open position, in which fresh air can enter the chamber. gas valve. The intake valve is moved between its open position and its closed position by an intake valve actuator. In the case of indirect injection, this actuator is a VTT actuator, also known as...

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Abstract

The invention relates to a method for estimating the air mass contained within the combustion chamber of a variable-timing heat-engine cylinder, which includes the steps of measuring the current position of the variable-timing actuators for each of the valves of the cylinder, predicting the time at which the exhaust valve closes (FE) and the times at which the intake valve opens and closes (OA, FA), in accordance with the current positions measured, and estimating the air mass (P masse air) estimated from the predicted times, in which, during the prediction step, the current position of each of said variable-timing actuators is corrected in accordance with the set position (Pos VTT cons sat filt) of each of the actuators.

Description

technical field [0001] The invention relates to the steering control of a heat engine of a motor vehicle and in particular to the control of the position of a variable valve timing actuator to allow a very accurate estimation of the mass of air contained in the combustion chamber of the cylinder of the heat engine. [0002] More specifically, the invention relates to a method for estimating the mass of air contained in a combustion chamber of a variable valve heat engine cylinder of a motor vehicle. Background technique [0003] It has been proposed to develop variable metering of fuel injection as an alternative to conventional cam systems, known as fixed metering. Variable valve distribution here means a technology that allows the phase of the intake and exhaust valves to be changed. Therefore, variable valve timing or variable valve timing actuators are used, and the abbreviation of the English name variable valve timing is generally called a VVT actuator. These actuato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02D41/00F02D41/18F02D41/10
CPCF02D13/0215F02D41/0002F02D41/107F02D41/182F02D2041/001F02D2041/1432F02D2200/0402F02D2250/12Y02T10/12Y02T10/40
Inventor 克里斯托夫·帕齐利艾丽西亚·加沃德
Owner PEZHO SITROEN AUTOMOBILS SA