Exhaust Purification Device Capable of Performing Regeneration by Using Quick Combustion

Abstract

An exhaust purification device for vehicles comprises a connection unit, a combustion unit, a buffer unit, a filtration unit, an emission unit, and a control unit. The connection unit is adapted to be connected to an exhaust pipe of a vehicle's engine. The combustion unit includes a main housing, a fuel-atomization nozzle, and an igniter. The nozzle and the igniter are arranged in an open-end container. The nozzle is connected to a fuel tank. An air pump is connected to the open-end container. The buffer unit is provided with a temperature sensor, an exhaust-buffering mask, and a fan. The filtration unit can remove the soot contained in the exhaust gas. The emission unit includes an L-shaped porous tail pipe being sealed with a porous cover. The control unit is electrically connected with the igniter, the fuel pump, the air pump, and the temperature sensor for controlling their operations.

I claim: 
     
         1 . An exhaust purification device for vehicles, comprising:
 a connection unit including an inlet and an outlet, the inlet adapted to be connected to an exhaust pipe of a vehicle's engine;   a combustion unit including a main housing, a fuel-atomization nozzle, and an igniter, wherein the main housing is connected to the outlet of the connection unit, the main housing defining a combustion chamber therein and being provided therein with a protective shell and an open-end container at a location that is not aligned with the outlet of the connection unit, the open-end container being located within the protective shell and leaving a gap with the protective shell, the fuel-atomization nozzle and the igniter being arranged in the open-end container and facing towards the combustion chamber, the fuel-atomization nozzle being connected to a fuel tank containing a fuel pump via a tube being provided with an electrical valve, an air pump being connected to the open-end container,   a buffer unit including a first buffer zone and a second buffer zone communicating with the first buffer zone, wherein the first buffer zone is connected to the main housing of the combustion unit and is provided therein with an exhaust-buffering mask near the main housing of the combustion unit and a fan near the second buffer zone to allow exhaust gas to go past the exhaust-buffering mask and then rotate the fan to enter the second buffer zone, whereby exhaust gas can flow into the second buffer zone more uniformly, thereby reducing exhaust gas being transferred back to the combustion unit;   a filtration unit connected to the second buffer zone of the buffer unit for receiving exhaust gas therefrom;   an emission unit connected to the filtration unit, wherein the emission unit includes an L-shaped tail pipe having a porous pipe wall and being sealed with a porous cover at its outlet;   a temperature sensor provided in the first buffer zone of the buffer unit for detecting temperature therein; and   a control unit electrically connected with the igniter, the fuel pump of the fuel tank, the air pump, and the temperature sensor for controlling their operations.   
     
     
         2 . The exhaust purification device for vehicles as claimed in  claim 1 , wherein the open-end container defines a plurality of through holes at its bottom. 
     
     
         3 . The exhaust purification device for vehicles as claimed in  claim 1 , wherein the exhaust-buffering mask has a conical wall that defines a plurality of through holes.