Second, excessive carbon fire engine Third, the air-fuel ratio of fire engines is not correct Sodium formate is one of the simplest organic carboxylates, white crystals or powders,density1.919g/cm3. with slightly Formic Acid odor. Easily soluble in water, and glycerin, slightly soluble in alcohol. Melting point253℃ (Anhydrous substance), odorless. Has reducibility.Slightly deliquescent and hygroscopicity.Non-corrosive, non-inflammable, the sodium formate is non-toxic to human body. Sodium Formate,sodium formate 98%, sodium formate 95% HENAN JINHE INDUSTRY CO.,LTD , https://www.speciatyelement.com
If the excessive carbon deposition in the combustion chamber of the engine will increase the compression ratio (high pressure is generated), high-temperature hot spots will be generated on the carbon deposition surface and the engine will knock.
Too light a mixture ratio of fuel to air will increase the combustion temperature, and an increase in the combustion temperature will cause an increase in the temperature of the environmental protection sweeper engine, which is, of course, prone to knocking. IV. Fuel octane is too low
The octane number is an indicator of the anti-knocking of the fuel. The higher the octane number, the stronger the anti-knocking resistance. The high compression ratio of the Sanitation Sweeper engine, the combustion chamber pressure is high, if the use of low anti-knocking fuel, knocking is likely to occur.
Sodium formate is mainly used in the production of insurance powder, Oxalic Acid and formic ACID.It is used as camouflage acid in chromium tannery, catalyst, stabilizer and reductant in printing and dyeing industry.
Causes of knocking failures in engines of fire engines
First, the fire engine ignition angle is too early In order to make the piston after the compression of the top dead center, once the power stroke can immediately get power, usually before the piston reaches the top dead center ignition (because from ignition to complete combustion takes some time) . However, too early ignition will cause most of the oil and gas to burn when the piston is still in the compression stroke. At this time, the unburned oil and gas will withstand extreme pressure auto-ignition and cause knocking.