Vehicle-mounted oil gas recovery system and method for plug-in hybrid power vehicle

Abstract

The invention provides a vehicle-mounted oil gas recovery system and method for a plug-in hybrid power vehicle. The vehicle-mounted oil gas recovery system comprises an oil tank, a carbon tank and anoil gas cooling circulation system communicating the oil tank with the carbon tank, and the oil gas cooling circulation system comprises a two-phase vortex tube, an elastic air bag and a liquid collector; when an oil tank isolation valve is opened, after oil gas enters the two-phase vortex tube and is cooled and separated, low-temperature oil gas enters the elastic air bag through a cold end tubeof the two-phase vortex tube, and enters the oil tank after pressure relief is completed, condensed liquid fuel enters the liquid collector through a liquid separation shell, and enters the oil tank after pressure relief is completed, and high-temperature oil gas enters the carbon tank through a hot end tube of the two-phase vortex tube and is adsorbed; and a controller starts an engine to desorbthe carbon tank when the vehicle is close to the refueling state or the accumulated adsorption capacity of the carbon tank reaches a critical value. The carbon tank saturation degree of the plug-in hybrid power vehicle can be reduced, the frequency of starting the engine due to forced desorption of the carbon tank is reduced, and evaporative emission and refueling emission are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of hybrid vehicles, and in particular relates to a vehicle-mounted oil gas recovery system and method for a plug-in hybrid vehicle. Background technique [0002] my country has a huge number of vehicles, most of which are gasoline vehicles, and environmental pollution problems such as smog and haze caused by vehicle exhaust emissions and evaporative emissions are becoming increasingly serious. In recent years, plug-in hybrid vehicles have developed rapidly, and compared with traditional gasoline vehicles, exhaust emissions have been greatly reduced. However, the problem of evaporative emissions from plug-in hybrid vehicles is still severe. If plug-in hybrid vehicles do not start for a long time, the oil and gas adsorbed in the carbon tank cannot be desorbed, resulting in a high degree of saturation of the carbon tank and the inability to absorb more oil and gas; refueling At this time, more oil and gas in t...

AI Technical Summary

Problems solved by technology

However, the problem of evaporative emissions from plug-in hybrid vehicles is still severe. If plug-in hybrid vehicles do not start for a long time, the oil and gas adsorbed in the carbon tank cannot be desorbed, resulting in a high degree of saturation of the carbon tank and the inability to absorb more oil and gas; refueling When the fuel tank breaks through the carbon tank, more oil and gas are discharged into the atmosphere, causing environmental pollution

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