A compression ignition engine system using single methanol fuel and method of operating same

Abstract

The invention discloses a compression ignition engine system using single methanol fuel, comprising: a compression ignition engine (1) comprising a cylinder assembly comprising a cylinder (2), a glowplug (6), an intake passage (7), an exhaust passage (19) and a fuel nozzle (3); a gas supply system that comprises a supercharger (14) and a gas inlet pipe (9) which are sequentially connected in series, wherein a heating mixing section (10) is arranged in the middle of the gas inlet pipe (9), and the heating mixing section (10) is connected with an ignition agent nozzle (11); and an exhaust system that comprises an exhaust pipe (5), wherein an inlet of the exhaust pipe (5) is connected to the exhaust passage (19), and an outlet of the exhaust pipe (5) is connected to the supercharger (14). The mixed gas of methanol and air is used as the ignition agent, methanol is used as fuel, normal operation of the compression ignition type engine system is achieved, the whole combustion process is controllable and efficient, and application of single methanol fuel to a diesel engine is achieved.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to a compression ignition engine system using methanol-based fuel and an operating method thereof. Background technique [0002] Methanol has received widespread attention due to its low price and low emissions from combustion in engines, especially in China, which has an extensive methanol supply chain. At present, the application of methanol as fuel in gasoline engines has achieved success, but the application of methanol in diesel engines has not made a breakthrough. Since the cetane number of methanol is very low, only about 3, it cannot be compression-ignited when applied to diesel engines, and it is very difficult to apply it to compression-ignition diesel engines. Therefore, in order to apply methanol to diesel engines, the main research direction of researchers is dual-fuel combustion, that is, the application of methanol-based fuels to diese...

AI Technical Summary

Problems solved by technology

Among them, the economic benefits of the first category are not obvious due to the low replacement ratio; the second category is relatively difficult to modify the main body of the diesel engine, which is difficult for customers to accept; the third category has complex systems and cost too high

In addition, the above three types are only the problems existing in the application of methanol-based fuel to diesel engines, so it is even more difficult to realize the application of pure methanol, that is, single methanol fuel in diesel engines

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