Particle capturing device regeneration system and control method thereof

Abstract

The invention relates to the technical field of automobiles, and discloses a particle capturing device regeneration system and a control method thereof. The particle capturing device regeneration system comprises an engine, a particle capturing device, an ECU and a vehicle controller; the engine comprises an oil injection mechanism and a plurality of air cylinders, air inlets of the air cylinderscommunicate with an air inlet pipeline, and air outlets of the air cylinders communicate with an air outlet pipeline; the oil injection mechanism comprises a plurality of spray nozzles corresponding to all the air cylinders one to one, and all the spray nozzles inject oil towards the corresponding air cylinders; and the ECU is in signal connection with the particle capturing device and the vehiclecontroller and is controllably connected with the oil injection mechanism. The particle capturing device regeneration system and the control method thereof have the advantages that the ECU can selectively control parts of the spray nozzles to stop oil injection according to the front-back differential pressure delta P and a vehicle signal sent by the vehicle controller, the oil injection amount of the remaining spray nozzles can be increased, thus regeneration of the particle capturing device is promoted by increasing the oxygen content of exhausted gas while the vehicle power demand is met,and compared with the situation that regeneration of the particle capturing device is promoted by increasing the temperature of the exhausted gas through electric heating, more oil is saved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a regeneration system of a particle trapping device and a control method thereof. Background technique [0002] With the increasingly stringent emission and fuel consumption regulations, energy saving and emission reduction has become the primary goal of today's automotive engine development. In order to meet the requirements of particulate matter emission regulations, particulate capture devices have become one of the many mainstream exhaust after-treatment devices. [0003] Existing regeneration systems and control methods of particulate traps can be classified into two types: passive regeneration and active regeneration. Among them, passive regeneration means that the particle trap automatically reaches the regeneration condition under the working conditions such as deceleration and fuel cut-off of the vehicle without external operation. Active regeneration refers to inc...

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Problems solved by technology

However, this method requires additional arrangement of air tanks and pipelines, which increases the difficulty of structural layout and is difficult to adopt on the whole vehicle.

The other is to use electric heating to increase the exhaust temperature. For traditional power vehicles, ordinary batteries cannot provide high-voltage current to support the work of electric heaters. This method is only suitable for hybrid vehicles; and in hybrid vehicles, it needs The heating operation of the electric heater is supported by driving the motor to brake and generate electricity, while driving the motor to brake and generate electricity will increase the fuel consumption of the engine, so the power consumption of the electric heater will increase the fuel consumption of the engine, which is not conducive to the economy of the vehicle

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