Peugeot Citroen Automobiles Sa

Piet Ameloot

Pascal Folliot

Ali Chaouche

Djamal Medioun

Yvon Beauge

Mickael Gascoin

Jean Nicolas Lesueur

A system for assisting regeneration of a storage/release NOx trap integrated in an exhaust line () of a motor vehicle diesel engine () is characterized in that it comprises gas admission means for admitting gas into the engine, means for injecting fuel () into the cylinders thereof in the form of at least pilot and main injections, and means for controlling () said gas admission and/or fuel injection means for periodically switching the engine () between a lean-mixture standard operating mode in which NOx is stored in the trap () and a rich-mixture regeneration operating mode, with at least two pilot injections () and one main injection (), in which NOx is released from the trap () and the trap is regenerated.

System for assisting regeneration of a storage/release NOx trap for a motor vehicle diesel engine

The system for assisting the regeneration of depollution means () integrated in an exhaust line () of a heat engine () of a motor vehicle, by switching the engine between operation in lean mode and operation in rich mode in accordance with various parameters () for controlling the operation of the engine, is characterized in that it comprises means () for measuring the temperature of the gases for supplying the engine and means () for correcting at least one parameter for controlling the operation of the engine in rich mode as a function of the measured temperature.

System for assisting the regeneration of depollution means integrated in an exhaust line of a heat engine

The invention provides a system for providing assistance in regenerating depollution means included in an exhaust system of a motor vehicle engine, the system comprising means for controlling the operation of the engine in order to switch the engine between operation in a standard lean mode and operation in a nominal rich mode for regeneration by using post-injection of fuel into the cylinders of the engine and by modifying at least one engine operation control parameter. The system comprises determination means for determining the fuel dilution level of the engine lubricating oil, monitoring means for monitoring the increase in said dilution level during operation of the engine in nominal rich mode so that when said level reaches a high, first threshold, the operation of the engine is switched to a degraded rich mode in which the fuel dilution of the oil is reduced, or the increase in dilution is slowed down, by modifying at least one operating control parameter of the engine, and monitor means for monitoring said reduction so that when the dilution level reaches a low, second threshold, the operation of the engine is switched back into nominal rich mode.

System for providing assistance in regenerating depollution means

This system for assisting regeneration of a storage/release NOtrap integrated into an exhaust system () of a motor vehicle diesel engine () is characterized in that it includes means () for injecting fuel into the cylinders of the engine () in the form of pilot injections and main injections and means () for controlling the injection means () to switch the engine () periodically from a standard mode of operation using a lean mixture and pilot injection and main injection, in which NOare stored in the trap (), to a regeneration mode of operation using a rich mixture, with at least two pilot or main injections depending on the engine load, in which NO, are released from the trap () and the trap is regenerated.

[object Object]

A system for assisting regeneration of depollution included in an exhaust system of a motor vehicle engine by switching the engine between operation in lean mode and operation in rich mode, depending on various parameters for controlling the operation of the engine, which includes a lambda probe placed in the exhaust gas outlet from the engine, and which corrects at least one of the operating parameters of the engine in order to provide closed-loop regulation of the richness of the exhaust gas about a target value while the engine is operating in rich mode.

Growing community of inventors

Neuilly sur Seine, France

Piet Ameloot