Exhaust pulse energy utilization system and turbocharger thereof

Abstract

The invention relates to the technical field of energy utilization, and discloses an exhaust pulse energy utilization system and a turbocharger thereof. The exhaust pulse energy utilization system comprises an engine and a plurality of pulse exhaust pipes communicating with cylinder bodies of the engine in a one-to-one correspondence mode correspondingly, and the exhaust tail end of each pulse exhaust pipe communicates with a gas inlet end of a gas supercharging device. A bypass channel is arranged at the position, close to the exhaust tail end, of each pulse exhaust pipe, the tail end of each bypass channel also communicates with the gas outlet end of the gas supercharging device, a one-way control valve is arranged between each bypass channel and the corresponding pulse exhaust pipe, and the one-way control valves are opened under the condition that pressure oscillation of the pulse exhaust pipes is negative pressure. Part of high pressure at the gas outlet end of the gas supercharging device is introduced. By arranging the one-way control valves, part of high-pressure gas at an outlet of a turbine of the turbocharger is introduced into the pulse exhaust pipes, the exhaust back pressure of the turbocharger is reduced, the gas pumping loss of the engine is reduced, the pressure of the pulse exhaust pipes at the moment is increased, and the energy utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to an exhaust pulse energy utilization system and a turbocharger thereof. Background technique [0002] The turbocharger technology uses the energy of the exhaust gas to drive the turbine to do work. The high-speed rotation of the turbine drives the coaxial compressor impeller to work, thereby increasing the intake pressure and increasing the intake air volume. In the past, the exhaust pipe of the engine mostly used a stabilized exhaust pipe, and the exhaust gas of each cylinder was directly connected together, and then the exhaust gas was discharged into the turbocharger to do work through the stabilized exhaust pipe. [0003] The study found that during the exhaust process of each cylinder of the engine, the exhaust pressure of each cylinder gradually decays in a waveform, and is lower than the atmospheric pressure within a certain range. All cylinders are ...

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Problems solved by technology

However, the pulse exhaust pipe still has a negative pressure area when the pressure fluctuates. image 3 As shown, this phenomenon has a very adverse effect on the pre-vortex pressure that drives the turbocharger to work.

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