LNG vaporizing emptying recycling and air supplementing pressurizing integrated device and control method

Abstract

The invention provides an LNG vaporizing emptying recycling and air supplementing pressurizing integrated device. The device comprises a heat exchanger (20), a one-way valve (12), an electromagnetic valve (13), an HC sensor (14), a dual-purpose gas storage tank (15), a pressure sensor (16), an emptying valve (17), a low-pressure filter (18), a pressure stabilizer (19), a low-pressure electromagnetic valve (21), an electric control pressure regulator (22), a one-way valve (26) and an electromagnetic valve (31). According to the device and the method, the problem of pressurization delay of an exhaust gas turbocharger is solved, and the surge of a gas compressor is avoided; the energy of turbocharging of an engine is fully utilized, and on the basis, an inflating pressurizing device is added,so that the hysteresis of the turbocharger is remarkably improved, and the power performance of a whole vehicle is obviously improved.

Description

technical field [0001] The invention belongs to the field of gaseous fuel low-temperature liquefaction storage vent recovery and engine pressurization, and in particular relates to an integrated device for LNG vaporization vent recovery and gas replenishment to reduce pressurization delay. Background technique [0002] In recent years, smog has occurred frequently in many places in my country, and the control of smog has become a difficult problem for the country. Studies have shown that PM2.5 particles in the air of major cities in my country mainly come from diesel vehicles. Natural gas burns cleanly and has low soot emissions. Studies have shown that replacing diesel with natural gas as vehicle fuel is one of the important measures to control urban smog. In addition, natural gas is a low-carbon energy source, the main component is methane, and the CO released by combustion 2 It is more than 20% less than diesel, and NOx is reduced by 39%, which is more in line with the ...

AI Technical Summary

Problems solved by technology

However, due to the delay of the exhaust gas turbocharger boosting, the engine output power is insufficient and the acceleration performance of the vehicle is poor due to the small exhaust flow of the engine in the early stage and the unsatisfactory transient response under acceleration and climbing conditions.

In order to reduce the boosting delay, many technical methods have been proposed in the industry, such as two-stage boosting, variable section boosting and other boosting technologies, but it is difficult to completely solve the delay problem.

There is also a way to eliminate the delay of supercharging by using air supplementation and supercharging, but the function of the air supplementation device is single. Due to the limited available space of the vehicle, the space utilization rate of this method is small, such as the scheme proposed by CN201420529738

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