A method and system for preventing over-combustion of a diesel particulate filter

Abstract

The invention discloses a method and a system for preventing over-combustion of a diesel particle catcher. The method comprises the steps that a carbon accumulation amount in the current diesel particle catcher is acquired; whether the carbon accumulation amount is larger than or equal to an over-combustion mass threshold or not is determined, and if yes, regeneration starting is forbidden; if not, whether the carbon accumulation amount is larger than or equal to a regeneration mass threshold or not is determined; when the carbon accumulation amount is larger than or equal to the regeneration mass threshold, whether the inlet temperature of the diesel particle catcher is larger than or equal to a regeneration temperature threshold or not is determined, and if yes, regeneration is started; and during a regeneration process, if a regeneration stopping condition is met, regeneration is stopped. By utilizing the method and the system, the problem of the diesel particle catcher in the prior art that over-combustion easily happens or excessive carbon particles in the diesel particle catcher cannot be effectively cleared off because a vehicle is at working conditions of idling and low-speed driving for a long term can be solved.

Description

technical field [0001] The invention relates to the technical field of electronic control, in particular to a method and system for preventing over-combustion of a diesel particle trap. Background technique [0002] Diesel engines are widely used in transportation, construction machinery and other fields due to their good economy, power, reliability and low CO and HC emissions. However, the particulate emission control of diesel engines has not been optimally controlled. In order to reduce environmental pollution and protect human health, stricter emission standards have been formulated at home and abroad. At present, exhaust after-treatment devices have become a standard configuration for diesel vehicles to solve the problem of carbon particle emissions, and diesel particulate filters (Diesel Particulate Filter, DPF) are recognized as a very effective method. [0003] The working principle of DPF: the exhaust gas containing a large amount of carbon particles emitted by the...

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Problems solved by technology

[0005] The present invention provides a method and system for preventing over-combustion of diesel particulate traps, which solves the problem that diesel particulate traps in the prior art are prone to over-combustion or cannot effectively remove diesel particulate traps due to the long-term idling and low-speed driving conditions of the vehicle. The problem of excessive carbon particles in the

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