Estimation of efficiency of application of lubricants with fullerene compositions during operation in main cycle of trucks

Abstract

The paper deals with the assessment of fuel efficiency of the car at operation with use of lubricants (motor and transmission oils) with fullerene compositions on the main driving cycle. Fullerene compositions were added to the engine and transmission oil at a concentration of 10% of the mass. The guiding document that defines the procedure for testing vehicles for fuel efficiency is National State Standard GOST 20306. Tests on the main cycle were carried out on a truck ZIL-5301 "Bichok" having a total mileage from the beginning of operation of 20 thousand km. The car is equipped with a diesel engine D 245.12 with a turbocharged capacity of 73 kW and a specific fuel consumption q = 245 g/kWh. The tests were performed on a ring road with a straight section. Before the start of the tests all units of the car were warmed up by a run on a ring road not less than 50 km long at a 2/3 maximum speed. The tests were performed on the main cycle at an ambient temperature of +20С (summer period of operation) and at an ambient temperature of -5°С (winter period of operation). Control races began in the car, which used lubricants according to the operating instructions. In the engine lubrication system engine oil M-10G2к (API CC, SAE 40), transmission units - transmission oil TAD-17i (API GL-5, SAE 85W90). Control races were repeated three times. At the same time, the arrival time was recorded with the help of a timer and the volumetric fuel consumption with the help of a flow meter in cm3 . It is established that when operating a car on main roads with asphalt pavement in the summer of use of fullerene composition in both engine and transmission oils, reduces the fuel consumption of the car on 15.43...18.34%. The value of 18.34% corresponds to the mileage of the car without cargo (m = 0), and the value of 15.43% mileage with cargo (m = 3000 kg). The coefficient of variation of the measured value of fuel consumption was 0.031...0.044. This allows us to conclude that the measurement error lies within 3.1...4.4%. The operating the car on the main roads with an asphalt covering in the winter of operation of application of fullerene composition (concentration 10% of the mass) simultaneously in engine oil and transmission oil reduces fuel consumption by 14.25...16.14%. The value of 16.14% corresponds to the mileage of the car without cargo (m = 0), and the value of 14.25% mileage with cargo (m = 3000 kg). The coefficient of variation of the measured value of fuel consumption was 0.046...0.035. This allows us to conclude that the measurement error lies within 4.6...3.5%.