Description:Complete Specification

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] This invention relates to a method to enhance a catalytic converter efficiency using split rich and lean oxygen mixture, and more particularly to enhancing three way catalytic converter efficiency by desulphurization using split rich and lean oxygen mixture technique.

Background of the invention
[0002] US 2021003057 AA describes a method for operating a petrol engine, in which air is introduced into an exhaust tract through which exhaust gas from the petrol engine can flow, bypassing the petrol engine, includes introducing the air into the exhaust tract at a point arranged downstream of a first three-way catalytic converter arranged in the exhaust tract and upstream of a second three-way catalytic converter arranged in the exhaust tract downstream of the first three-way catalytic converter. The petrol engine is operated with a sub-stoichiometric combustion air ratio, where a desulphurization of the second three-way catalytic converter is affected.

Brief description of the accompanying drawing
[0003] Figure 1 illustrates an algorithm for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture.

Detailed description of the embodiments
[0004] Figure 1 illustrates an algorithm 100 for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture. The algorithm 100 comprises supplying 110 a lean fuel-oxygen mixture through at least one cylinder of an internal combustion engine such that an exhaust temperature of the lean fuel-oxygen mixture is low, and supplying 120 a rich fuel-oxygen mixture through at least one cylinder of the internal combustion engine such that a summation of an exhaust of the lean fuel-oxygen mixture and an exhaust of the rich fuel-oxygen mixture produces a lambda value equal to unity, and wherein an exhaust temperature of the rich fuel-oxygen mixture is high. The algorithm 100 further comprises channeling 130 the rich fuel-oxygen mixture at high temperature that flows from at least one cylinder of the internal combustion engine through a catalytic converter to desulfurize the sulfur that is present in the catalytic converter.

[0005] Figure 1 illustrates an algorithm 100 for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture. The algorithm 100 comprises supplying 110 a lean fuel-oxygen mixture through at least one cylinder of an internal combustion engine such that an exhaust temperature of the lean fuel-oxygen mixture is low. More specifically, based on a signal that is received from a lambda sensor the electronic control unit controls a quantity of oxygen that is allowed to flow into at least one engine cylinder such that the exhaust gas mixture that flows out from the at least one engine cylinder is a lean mixture.

[0006] The algorithm 100 comprises supplying 120 a rich fuel-oxygen mixture through at least one cylinder of the internal combustion engine such that an exhaust temperature of the rich fuel-oxygen mixture is high. More specifically, based on a signal that is received from a lambda sensor the electronic control unit controls a quantity of oxygen that is allowed to flow into at least one engine cylinder such that the exhaust gas mixture that flows out from the at least one engine cylinder is a rich mixture. More specifically, the electronic control unit controls a quantity of rich fuel-oxygen mixture and lean fuel-oxygen mixture that each flow into their respective engine cylinders such that a summation of the exhaust of the lean fuel-oxygen mixture and the exhaust of the rich fuel-oxygen mixture produces a lambda value equal to unity,

[0007] The algorithm 100 further comprises channeling 130 the rich fuel-oxygen mixture at high temperature that flows from at least one cylinder of the internal combustion engine through a catalytic converter to desulfurize the sulfur that is present in the catalytic converter. More specifically, the sulfur that is present in the catalytic converter is required to be oxidized at high temperature to desulfurize the sulfur that is present in the catalytic converter. In an exemplary embodiment, the exhaust temperature of the rich fuel-oxygen mixture is around 700 degrees Centigrade. In addition, two or more cylinders of the internal combustion engine may be operated in tandem to channel the rich fuel-oxygen mixture at high temperature that flows from at least one cylinder of the internal combustion engine through the catalytic converter to desulfurize the sulfur that is present in the catalytic converter.

[0008] It must be understood that the embodiments explained above are only illustrative and do not limit the scope of the disclosure. Many modifications in the embodiments with regard to dimensions of various components are envisaged and form a part of this invention. The scope of the invention is only limited by the scope of the claims.
, Claims:We Claim

1. An algorithm (100) for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture, the algorithm (100) comprising:
supplying (110) a lean fuel-oxygen mixture through at least one cylinder of an internal combustion engine such that an exhaust temperature of the lean fuel-oxygen mixture is low;
supplying (120) a rich fuel-oxygen mixture through at least one cylinder of the internal combustion engine such that a summation of an exhaust of the lean fuel-oxygen mixture and an exhaust of the rich fuel-oxygen mixture produces a lambda value equal to unity, and wherein an exhaust temperature of the rich fuel-oxygen mixture is high; and
channeling (130) the rich fuel-oxygen mixture at high temperature that flows from at least one cylinder of the internal combustion engine through a catalytic converter to desulfurize the sulfur that is present in the catalytic converter.

2. The algorithm (100) for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture in accordance with Claim 1, wherein an exhaust temperature of the rich fuel-oxygen mixture is around 700 degrees Centigrade.

3. The algorithm (100) for enhancing a catalytic converter efficiency using split rich and lean oxygen mixture in accordance with Claim 1, wherein two or more cylinders of the internal combustion engine may be operated in tandem to channel the rich fuel-oxygen mixture at high temperature that flows from at least one cylinder of the internal combustion engine through the catalytic converter to desulfurize the sulfur that is present in the catalytic converter.