Abstract: In a system for assisting the regeneration of depollution apparatus associated with an oxidation catalyst implementing an OSC function, constituting a supply of oxygen and integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with a common rail for feeding its cylinders with fuel, the running conditions of the vehicle are analyzed and compared with predetermined threshold values, to control the engine in a first regeneration mode of operation with a lean mixture when running conditions are above the threshold values, or in a second regeneration operating mode implementing sequences in which engine operation alternates between stages of rich mixture operation and of lean mixture operation when conditions are below the threshold values.

Abstract: The inventive system for evaluating the charged state of depollution means integrated into the exhaust line of a motor vehicle engine is characterised in that it comprises means (7) for determining a pressure in the depollution means, means (8) for determining the volume gas flowrate upstream said depollution means (10) and means for comparing the depollution means state defined by the thus determined pressure and the volume flowrate with a predetermined diagram (11) of the absent, overcharged and clogged states of the depollution means in order to evaluate the state thereof.

Abstract: Method of assisting regeneration of a depollution device (1) associated with an oxidation catalyst (2) and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), in which a common ramp supplies fuel to the cylinders of the engine, by shifting the engine (4), through modification of engine operation control parameters and use of fuel post-injections into the cylinders, among four strategies of regeneration of the depollution device (1), the first called normal engine operation strategy, the second called level 1 strategy, the third called level 2 strategy and the fourth called over-calibrated level 2 strategy, enabling different thermal levels to be achieved in the exhaust line, with looping back of the strategies, until detection of a request for stopping the regeneration.

Abstract: The invention concerns a system for evaluation regeneration of pollution management means (1) integrated in an exhaust line (2) of a motor vehicle engine, characterized in that it comprises means (4) for determining the thermal power input by the exhaust gas upstream of the pollution management means during the regeneration phase thereof and means (4) for comparing said power to threshold values (Sb, Sh) to determine a partial or total failure of regenerating said means.

Abstract: The inventive system comprises means (10) for determining the vehicle running mode, means (11) for determining the mass of elementary carbon exhausted by the engine according said running mode, means (15) for accumulating said elementary masses during the engine operation and obtaining a total mass thereof, means (18) for calculating the volume of ash from engine lubrication oil, means (20) for calculating the volume of ash from engine feed fuel, means (21) for calculating the effective volume of the depollution means on the basis of the total volume of the means thereof as they are new or cleaned, the already calculated volume of ash and means for calculating the degree of soot loading of the depollution means on the basis of the total mass, the effective volume and the maximum density of deposits on the depollution means.

Abstract: The inventive system for assisting in the regeneration of depollution means (1) which is integrated in the exhaust means (3) of a diesel engine (4), wherein the engine (4) is associated with a common rail supplying means (7, 8) for injecting fuel into cylinders thereof using at least one post-injection and for carrying out at least two regeneration strategies by isotorque modifying the parameters of the engine operation control, wherein the first regeneration strategy comprises a first level strategy and a second level strategy and the second regeneration strategy comprising the first level strategies and a sequence alternating the second and second over-calibrated level strategies, thereby making it possible to obtain different thermal levels in the line.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means (2) implementing an oxygen storage capacity (OSC) function, and integrated in an exhaust line of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7) supplying fuel to the cylinders thereof. The invention is characterized in that it comprises means (8) for determining the frequency of the pollution management means regeneration and for comparing same to predetermined threshold values (10), to control the engine (4) in a first lean mixture regeneration operating mode (11) for frequencies less than the threshold values or in a second regeneration operating mode implementing engine operating sequences alternating rich mixture and lean mixture operating phases (12) for frequencies more than the threshold values.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means implementing an oxygen storage capacity (OSC) function, and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7) supplying fuel to the cylinders thereof. The invention is characterized in that it comprises means (8) for determining the number of incomplete regeneration processes of the pollution management means and for comparing same to predetermined threshold values (10) to control the engine (4) in a first lean mixture regeneration operating mode (11) for a number less than the threshold values or in a second regeneration operating mode of engine operation sequences alternating rich mixture and lean mixture operating phases (12) for a number greater than the threshold values.

Abstract: The inventive system for controlling the regeneration of depollution means (1) which is integrated into the exhaust line (2) of a motor vehicle engine (3) and is associated with a common rail fuel supply means for carrying out the depollution means regeneration strategies (6) by using the fuel post-injections into the engine cylinders, wherein said system also comprises, for each regeneration, means (7) for calculating a total time spent in different regeneration strategies and means (8) for comparing said total time with a maximum threshold value (9) in order to stop the regeneration when said threshold is exceeded.

Abstract: System in which the depollution device is associated with an oxidation catalyst, and the engine is associated with a common rail for feeding it with fuel and adapted to implement a regeneration strategy using at least one post-injection of fuel into the cylinders. In the system, a request for regeneration (req.RG) can be detected, whether the engine is in a stage of idling can be detected, a temperature downstream from the catalyst can be acquired, a maximum duration for post-injection application during the stage of idling can be determined on the basis of said temperature, and the post-injection can be progressively reduced as soon as the duration of use has reached the maximum duration.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) integrated in an exhaust line (3) of a diesel engine (4), wherein the engine (4) is associated with common ramp means (7) injecting fuel into the cylinders thereof, based on at least one post-injection and adapted to implement, in isocouple, through modification of the engine operation control parameters, at least two strategies called level 1 and level 2 and a second regeneration strategy including level 1 strategies and a sequence alternating level 2 and over-calibrated level 2 strategies, enabling different thermal levels to be achieved in the exhaust line. The invention is characterized in that it comprises means (8) for analyzing the vehicle running conditions and means (8) for comparing same to threshold values, to implement the first regeneration strategy for running conditions higher than the threshold values or the second regeneration strategy for running conditions lower than the threshold values.

Abstract: A system in which the depollution means (1) are associated with oxidation catalyst-forming means (2), and the engine (4) is associated with common manifold means (7) for feeding it with fuel, and adapted to implement a regeneration strategy in at least one operation of post-injecting fuel into the cylinders, is characterized in that is comprises: detector means (8) for detecting a regeneration request (req.RG); detector means (9) for detecting a state of the foot being raised on the vehicle accelerator; temperature acquisition means (11) for acquiring the temperature downstream from the catalyst-forming means (2); means (8) for determining a maximum quantity of fuel to be injected in the post-injection operations during the period of returning to idling following the foot being raised, and on the basis of said temperature; and means (7, 8) for immediately interrupting the post-injection operation as soon as the quantity of fuel injecting has reached the maximum quantity.

Abstract: This system in which the engine implements regeneration strategies at a first level and at a second level depending on different engine operation control parameters in order to obtain different temperature levels in the exhaust line involves acquiring the exothermic temperature level of the catalyst, comparing it with a threshold value so that in the event of the threshold being exceeded while the second level strategy is being applied, the system is controlled to regulate one of the engine operation control parameters in order to reduce the exothermic temperature level, and if this temperature level does not drop back below the threshold value at the end of a first time period, the system is controlled to switch over to the first level strategy, and if this exothermic temperature level still does not drop below the threshold value at the end of a second time period, to stop the regeneration strategy.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) integrated in an exhaust line (3) of a diesel engine (4), wherein the engine (4) is associated with common ramp means (7, 8) injecting fuel into the cylinders thereof, based on at least one post-injection and adapted to implement, in isocouple, through modification of engine operation control parameters, at least two regeneration strategies called level 1 and level 2 strategies and a second regeneration strategy including level 1 strategies and a sequence alternating the level 2 and over-calibrated level 2 strategies, enabling different thermal levels to be achieved in the exhaust line.

Abstract: System in which the depollution apparatus is associated with an oxidation catalyst-forming device, and the engine is associated with a common rail for feeding it with fuel and adapted to implement the strategy of regeneration using at least one postinjection of fuel into the cylinders. In the system, a regeneration request can be detected, a state in which the vehicle accelerator pedal is being raised can be detected, the temperature downstream from the catalyst-forming means can be acquired, and it can be determined, on the basis of this temperature, the maximum duration for applying postinjections during a stage in which the engine is returning to idling as a result of the accelerator pedal being raised, for immediately cutting off postinjection as soon as the duration of postinjection use has reached the maximum duration.

Abstract: System in which the NOx trap is associated with a catalyst integrated in an exhaust line of a vehicle engine, and in which the engine is associated with common manifold or “rail” fuel feeder for feeding it with fuel and adapted, by modifying control parameters for the operation of the engine, to cause the engine to switch between lean mixture operation and rich mixture, in which the fuel feeder is adapted to define three strategies for controlling lean mixture operation of the engine, and to cause the engine to switch between its various strategies in order to keep the trap in a temperature window of maximum effectiveness.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means (2) and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7, 8) supplying fuel to the cylinders of the engine, adapted, through modification of engine operation control parameters and use of fuel post-injections into the cylinders thereof, to shift the engine (4) among four strategies of regeneration of the pollution management means (1), the first called normal engine operation strategy, the second called level 1 strategy, the third called level 2 strategy and the fourth called over-calibrated level 2 strategy, enabling different thermal levels to be achieved in the exhaust line (3).

Abstract: The invention relates to a system for carrying out a regeneration strategy by means of at least one fuel post-injection into cylinders and is characterised in that the inventive system comprises means (11) for measuring a temperature downstream of catalyst forming means, means (8) for determining a maximum time for applying the post-injections during return to idling phases produced by lifting off and idling according to said temperature and means (7, 8) for immediately stopping the post-injection when the maximum time is attained during the idling phase and/or a progressively reducing the post-injection when the application time attains the maximum value during said idling phase.

Abstract: The inventive system for assisting in the regeneration of depollution means (1) which is integrated in the exhaust means (3) of a diesel engine (4), wherein the engine (4) is associated with a common rail supplying means (7, 8) for injecting fuel into cylinders thereof using at least one post-injection and for carrying out at least two regeneration strategies by isotorque modifying the parameters of the engine operation control, wherein the first regeneration strategy comprises a first level strategy and a second level strategy and the second regeneration strategy comprising the first level strategies and a sequence alternating the second and second over-calibrated level strategies, thereby making it possible to obtain different thermal levels in the line.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means implementing an oxygen storage capacity (OSC) function, and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7) supplying fuel to the cylinders thereof. The invention is characterized in that it comprises means (8) for determining the number of incomplete regeneration processes of the pollution management means and for comparing same to predetermined threshold values (10) to control the engine (4) in a first lean mixture regeneration operating mode (11) for a number less than the threshold values or in a second regeneration operating mode of engine operation sequences alternating rich mixture and lean mixture operating phases (12) for a number greater than the threshold values.