FIELD: maintenance.
SUBSTANCE: invention can be used in the maintenance of internal combustion engines. The method for cleaning the combustion chamber and the cylinder-piston group of an internal combustion engine consists in supplying a cleaning agent in the form of foam to each of the cylinders of an idle engine that has cooled down to a temperature of 50 °C, holding the foam for 30 minutes, sucking out the liquid formed after the foam of the cleaning agent has settled from each cylinder and purged with compressed air. As a cleaning agent in the form of foam, an aqueous solution of a complex of components is used, including low molecular weight amines, surfactants, ethers and deionized water. Additionally, the second phase of cleaning the combustion chamber and the cylinder-piston group of the internal combustion engine is carried out, which includes holding the liquid formed after the foam has settled for at least 30 minutes. Suction of the liquid formed after the foam of the cleaning agent has settled from each cylinder and blowing with compressed air is carried out after the end of the second additional cleaning phase. The quantitative and qualitative composition of the cleaning agent in the form of foam ensures the preservation of the cleaning properties of the liquid formed after the foam has settled, and the formation of its volume sufficient to completely immerse the piston surface in it, as well as its subsequent seepage into the area of the rings, to clean and soften deposits in the piston channels. The composition of the cleanser in the form of a foam additionally comprises carboxylic acids of the formula R1-COOH, where R1 comprises 12-18 carbon atoms, a nonionic surfactant in the form of nitrogen- and oxygen-comprising organic substances of the following general formula is used as a surfactant: R1C(O)N(R2)(R3) or R1-N-(R2)(R3), where R1 is a hydrocarbon residue of a mixture of saturated and unsaturated fatty acids comprising from 12 to 24 carbon atoms; R2, R3 = H; CH3; С2Н5О, compounds of the formula are used as esters: R1-O-R2, where R1 represents Cn H2n+1, or –C(O) C Cn H2n+1 at n=1-4, R2 is CnH2nOH at n=2-4. As low molecular weight amines, amines of the formula are used: R1-N-(R2)(R3), where R1 R2, R3 = H, CH3, C2H5O, C3H6O, C2H5 in the following ratio of ingredients: nitrogen- and oxygen-containing organic substances of the general formula: R1C(O)N(R2)(R3) or R1-N-(R2)(R3), where R1 is a hydrocarbon residue of a mixture of saturated and unsaturated fatty acids comprising from 12 to 24 carbon atoms; R2, R3 = H; CH3; С2Н5О - 2-10%, carboxylic acids of the formula R1–COOH, where R1 comprises 12-18 carbon atoms - 5-20%, low molecular weight amines of the formula: R1-N-(R2)(R3), where R1, R2, R3 = H, CH3, C2H5O, C3H6O, C2 H5 - 2-10%, compounds of the formula: R1-O-R2, where R1 represents Cn H2n+1 or –C(O) C Cn H2n+1, at n=1-4, R2 CnH2nOH at n=2-4, 15-30%, the rest is deionized water up to 100%.
EFFECT: providing a cleaning effect not only on the parts of the combustion chamber, but also on the parts of the cylinder-piston group of the internal combustion engine, including oil scraper and compression piston rings.
1 cl, 2 tbl
