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Method for managing a fuel supply of a spark ignition internal combustion engine and a supply system implementing said method

A fuel supply system, internal combustion engine technology, applied in the direction of internal combustion piston engines, combustion engines, engine components, etc., can solve the problem of increase or decrease

Pending Publication Date: 2020-12-04
FPT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This A / F forced operation makes adjustments to the supply of fuel, increasing or decreasing the amount of fuel that will be injected, thereby alternatively causing the combustion to occur in the cylinder i oxygen deficient or excessive

Method used

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  • Method for managing a fuel supply of a spark ignition internal combustion engine and a supply system implementing said method
  • Method for managing a fuel supply of a spark ignition internal combustion engine and a supply system implementing said method
  • Method for managing a fuel supply of a spark ignition internal combustion engine and a supply system implementing said method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] figure 1 A spark ignition internal combustion engine E is schematically shown provided with supply means J, such as fuel injectors.

[0058] The engine E is provided with an exhaust line on which a three-way catalyst 3WC is accommodated. Upstream of the catalyst, there is a binary lambda sensor B along the exhaust line, which is adapted to switch between two logic conditions indicating lean burn and rich burn respectively.

[0059] The processing unit CPU oversees the control of the internal combustion engine E and in particular the processing unit CPU controls the injection of fuel into the cylinders of the engine by means of the associated injectors J .

[0060] The processing unit implements a closed-loop control of the binary lambda sensor B such that the supply to the internal combustion engine oscillates continuously around a stoichiometric air / fuel ratio (A / F).

[0061] When a switch in the signal level produced by the lambda sensor is detected, the processing ...

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Abstract

A method for managing a supply of a spark ignition internal combustion engine (E), the method comprising a procedure of commanding a supply of said engine based on a switching between two logical conditions of a binary sensor (B), so that said fuel oscillates around a stoichiometric fuel condition, the method comprising a first procedure carried out in stationary operating conditions of the internal combustion engine formed by a first step of registering at least two values of said air / fuel ratio (Lambda1 and Lambda2) for as many other consecutive switches, a second step of calculating an average value (Lambdam) of said two registered values, a third step of setting said calculated average as a reference value (Ref) of the air / fuel ratio.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Italian Patent Application No. 102018000003377, filed March 8, 2018, the disclosure of which is incorporated herein by reference. technical field [0003] The invention relates to the field of methods and systems for managing the supply of spark ignition engines. Background technique [0004] In spark ignition engines, which are also known as Otto engines, compliance with the stoichiometric ratio is essential in order to comply with the limits set by law on polluting emissions. [0005] This is also important when trying to ensure uniform performance in terms of torque delivery, regardless of unpredictable variations in the amount of fuel used. [0006] This problem is particularly pressing in the field of supplying engines with a gas such as natural gas commonly called methane, which can be stored in tanks in gaseous form (CNG) or in liquid form (LNG). [0007] Gaseous or liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14
CPCF01N3/101F02D19/029F02D41/0027F02D41/1408F02D41/1454F02D41/1474F02D41/1491F02D41/2441F02D41/2454F02D41/2487F02D2200/0612Y02A50/20Y02T10/12
Inventor 马尔切洛·卡罗布鲁诺·艾马尔阿尔多·布鲁卡托
Owner FPT IND
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