Constant-volume combustion bomb system for simulating self-combustion of gas at tail end of gasoline engine

Abstract

The invention discloses a constant-volume combustion bomb system for simulating self-combustion of gas at the tail end of a gasoline engine. The constant-volume combustion bomb system consists of a constant-volume combustion device, a fuel supply system, an ignition system, a high-speed photography system, a gas intake and exhaust system, a data acquisition system and a single-chip control system, wherein the constant-volume combustion device comprises a combustion bomb body with a cylindrical cavity; a main spark plug is mounted on the upper end surface of the combustion bomb body, at the end close to an oil injector, and an auxiliary spark plug is mounted close to the left end of the combustion bomb body; and the combustion bomb body is provided with a left window, a front window and a rear window and is further provided with the oil injector, a high-frequency response temperature sensor, a high-frequency response cylinder pressure sensor, a pressure transmitter mounting hole, a temperature transmitter mounting hole, an exhaust port and an intake channel. According to the invention, the main spark plug is adopted to simulate the normal flame ignition while the auxiliary spark plug is adopted to simulate self-combustion of gas at the tail end, so that self-combustion of gas at the tail end of the gasoline engine at all times can be simulated without the need of reaching high temperature and high pressure, and the constant-volume combustion bomb system is used for researching the influence of self-combustion of different tail-end gases to the cylinder internal pressure and detonation.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine combustion, in particular to a test device for simulating the spontaneous combustion of gas at the end of a combustion chamber of a gasoline engine, which is mainly used to study the effect of the spontaneous combustion of the end gas at different moments on the cylinder pressure and knocking after the gasoline engine is ignited Impact. Background technique [0002] In order to improve the power per liter and thermal efficiency of the engine, measures such as supercharging technology and increasing the compression ratio have been widely used. The main factor limiting the above technical measures is engine knocking, which will cause sharp fluctuations in the pressure in the engine cylinder, reduce output power and thermal efficiency, and even damage the engine. The most plausible explanation for the occurrence of detonation is spontaneous combustion of the terminal gases. [00...

AI Technical Summary

Problems solved by technology

In view of the above reasons, it is very difficult to directly study the spontaneous combustion of the terminal gas in a constant volume incendiary bomb

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