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

A technology of constant-volume incendiary bombs and constant-volume combustion, which is applied in the direction of internal combustion engine testing, etc., can solve problems such as the difficulty of spontaneous combustion, and achieve the effects of long fuel mixing time, low cost, and simple structure

CN103245511BActive Publication Date: 2015-06-10TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-06-10

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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.
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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...

Examples

Embodiment Construction

[0037] The present invention will be described in further detail below through specific examples. The following examples can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way.

[0038] Such as figure 1 As shown, this embodiment discloses a constant-volume incendiary bomb system for simulating the spontaneous combustion of gas at the end of a gasoline engine with double spark plugs. Data acquisition system and single-chip control system.

[0039] Such as Figure 2 to Figure 6 As shown, the constant volume combustion device includes a rectangular parallelepiped incendiary bomb body 1, a cylindrical cavity 2 is arranged transversely in the middle of the incendiary bomb body 1, and the left end face of the cylindrical cavity 2 is connected with the incendiary bomb body 1, and the right end is not It runs through and is 5cm away from its right end face. The fuel injector 3 is installed on t...