Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method

Abstract

The invention discloses a device for detecting engine exhaust back pressure. An opening at one side of a sleeve-shaped shell is provided with an air inlet, and an annular lug boss is arranged on the inner wall of the shell, where the air inlet is positioned; a top cover with an axial through hole is hermetically fixed on the opening at the other side of the shell; the upper end of a mandril penetrates through the axial through hole, the lower end of the mandril is provided with a bottom tray which supports against the annular lug boss or separates from the annular lug boss; an elastic member is arranged between the bottom tray and the top cover; and an air vent is arranged on the outer wall of the shell, and the axial size between the air vent and the bottom tray is more than the thickness of the bottom tray. Furthermore, the invention also provides a particle catch regeneration control system and method for a diesel engine by utilizing the device. The mandril is stretched under the action of the exhaust back pressure to ensure that a control circuit board outputs a particle catch regeneration control signal or alarm signal, therefore, the time of particle catch initiative regeneration of the diesel engine is effectively controlled, and the service life of the engine and a DPF (Diesel Particulate Filter) member is prolonged.

Description

technical field [0001] The invention relates to the field of diesel engine emission control, in particular to an engine exhaust back pressure detection device and a diesel engine particle capture regeneration control system and method using the device. Background technique [0002] Diesel engine is the main type of power source for freight vehicles. Due to its good power and economy, it has gradually been used in large and medium-sized cars in recent years. [0003] As we all know, the main factor limiting the development of diesel engines is the issue of emissions. The main emissions of diesel engines are particulates, which are usually more than 30 times that of gasoline engines. Since the particulates emitted by diesel engines are very harmful to the human body, the issue of emissions from diesel engines has attracted widespread attention from governments around the world, and they have formulated regulations one after another. Strict emission standards. In order to mee...

AI Technical Summary

Problems solved by technology

[0006] (1) If the content of sulfide in the particle composition is too high, since the sulfide will not participate in the combustion, it will lead to incomplete regeneration, and the exhaust back pressure will continue to rise, thereby affecting the power of the engine and prone to The phenomenon that the exhaust gas temperature is too high and damages the engine;

[0007] (2) Improper control of the regeneration time may easily lead to excessive internal temperature of the DPF and damage the DPF components

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