Cold start device and cold start method of M100 methanol engine

Abstract

The invention relates to a cold start device and a cold start method of an M100 methanol engine. The device comprises a controller, a methanol steam generator, a water temperature sensor, a DC contactor and a temperature sensor of the methanol steam generator. The method comprises the following steps: the controller detects the cooling water temperature of the engine through the water temperaturesensor of the engine; when the water temperature is lower than 16 DEG C, the DC contactor is switched on, and a PTC ceramic thermistor is used for heating; when the temperature in an evaporation cavity is higher than 180 DEG C, an electrically-controlled methanol spraying device sprays methanol into the evaporation cavity, the methanol sprayed on an annular evaporation column is heated and evaporated into methanol steam, and the methanol steam enters an intake manifold of the engine through a methanol steam channel and a throat opening on a connecting plate; and after cold start of the engineis performed, the cold start device stops working. In the invention, when the engine is in the cold start, the concentration of the combustible gas mixture entering a cylinder reaches the firing limit, and the engine is started, thereby solving the problem of the cold start of the methanol engine.

Description

technical field [0001] The invention relates to an engine cold start device and a method thereof, in particular to a device and a cold start method for an M100 methanol engine cold start. Background technique [0002] For areas with scarce oil resources, using relatively abundant coal resources to develop coal-based methanol alternative fuels for vehicles is an important way to solve regional energy security problems. The production process of methanol is relatively simple, and the sources of raw materials are diverse. Methanol can be produced from coal, oil and natural gas. Methanol has good combustion performance, low emission, mature production process, low cost, convenient transportation and storage, and is regarded as the most promising alternative fuel for vehicles. [0003] However, the latent heat of vaporization of methanol is large (1101kJ·kg-1), which is 3.7 times that of gasoline (297kJ·kg-1). At the same temperature (20°C), the evaporation of methanol fuel is ...

AI Technical Summary

Problems solved by technology

The methanol fuel injected during startup is heated by the methanol steam generator to generate methanol vapor, which increases the concentration of methanol vapor entering the cylinder, making the combustible mixture reach the ignition limit, and solves the problem of cold start of the M100 methanol engine when the ambient temperature is low

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