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Method and device for adjusting an engine combustion parameter, recording medium for this method and vehicle equipped with this device

A technology of combustion parameters and parameter values, applied in engine control, combustion engine, machine/engine, etc.

Inactive Publication Date: 2014-05-21
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] A problem encountered is that the regulation in the closed loop set up to adjust these combustion parameters will only work correctly from the moment the engine reaches a certain operating temperature

Method used

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  • Method and device for adjusting an engine combustion parameter, recording medium for this method and vehicle equipped with this device
  • Method and device for adjusting an engine combustion parameter, recording medium for this method and vehicle equipped with this device
  • Method and device for adjusting an engine combustion parameter, recording medium for this method and vehicle equipped with this device

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Embodiment Construction

[0024] figure 1 Denotes a vehicle 2 such as a vehicle equipped with an internal combustion engine dedicated to driving the drive wheels 4 of the vehicle in rotation. figure 1 Only a portion of the internal combustion engine is shown. More precisely, the part shown consists of a cylinder 6 fitted with a piston 8 in translation. Piston 8 drives crankshaft 10 to rotate by means of connecting rod 12 . The crankshaft 10 drives the drive wheel 4 to rotate. The internal combustion engine also includes an intake duct 14 for the intake of oxidant, that is to say air that enters the cylinder 6 . This intake duct 14 includes a butterfly valve 16 , the angular position of which makes it possible to regulate the amount of air entering the cylinder 6 . The angular position of the butterfly valve 16 can be adjusted with a controllable actuator 18 .

[0025] The engine also includes injectors 20 for hydrocarbon fuel. Illustratively, here injector 20 injects hydrocarbon fuel directly int...

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PUM

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Abstract

The invention relates to a method for adjusting a combustion parameter Pi of a combustion engine during a cold start, characterized in that the value of the parameter Pi is established (104) by interpolating between two predetermined values PiREF1 and PiREF2 as a function of the value ω of engine speed and of a temperature of an engine coolant, the values PiREF1 and PiREF2 being optimal in order to reduce pollutant emissions when the engine is running on reference fuel of respectively high volatility and low volatility.

Description

technical field [0001] This application claims priority from French patent application 0855717 filed on August 26, 2008, the contents of which (text, drawings and claims) are incorporated by reference. [0002] The invention relates to a method and a device for adjusting at least one combustion parameter during a cold start of an internal combustion engine. The invention also relates to a recording medium for carrying out the method and a vehicle equipped with the device. Background technique [0003] Here, engine combustion parameters are defined as adjustable parameters that allow changing the amount of hydrocarbon fuel or oxidizer injected into the engine cylinder, or changing the timing of intake or exhaust of the cylinder, or changing the timing of ignition of the gas mixture in the cylinder. [0004] The so-called "cold start" refers to the start of the engine after the engine has been stopped for a long enough time, and the engine temperature is equal to the engine c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/14
CPCF02D2200/0612F02D41/064F02D41/1497F02D19/088F02D19/084F02D41/0025Y02T10/30
Inventor J-M·热安P·若利
Owner PEZHO SITROEN AUTOMOBILS SA