THEORETICAL STUDIES OF THE INFLUENCE OF THE AIR FLOW RATE IN FRONT OF THE RADIATOR FRONT ON THE FUEL CONSUMPTION OF THE CAR ENGINE

Abstract

The increase in the cost of fuel for motor vehicles causes not only the search for alternative energy sources and the use of new engine designs for cars, but also the search for ways to reduce fuel consumption in existing cars with an internal combustion engine by improving their design. The power generated by the internal combustion engine is spent not only on the drive of the driving wheels, but also on the drive of auxiliary equipment that provides the ability to operate the engine and its systems, as well as increasing the safety and comfort of movement. By reducing the power to drive the auxiliary equipment or its operating time, it is possible to reduce the fuel consumption of the engine. A mandatory element of any car equipped with an internal combustion engine is the cooling system, which in its composition contains a radiator that provides heat transfer of excess heat to the atmosphere and a fan that intensifies this process if necessary. The operating time of the fan directly affects the fuel consumption of the car engine, therefore, by reducing the operating time of the fan, you can reduce fuel consumption. This can be achieved by increasing the value of the total heat transfer coefficient through the radiator walls, which depends on the speed of air flowing through the radiator. The speed of the air flow, without increasing the power consumed by the fan, can be increased by reducing the aerodynamic resistance of the air path of the car. The theoretical assumptions supported by the analysis of previous studies need experimental confirmation and practical assessment of the amount of fuel economy when improving the air path of the car, which reduces the fan operating time. Purpose – theoretical justification of the influence of the air flow velocity in front of the radiator front on the fuel consumption of the car engine. Methodology the article uses a systematic approach, as well as methods of mathematical modeling. Results: on the example of a particular car, the effect of increasing the air flow velocity in front of the radiator front on the fuel consumption of the car engine is determined. Practical implications the results obtained can be used by organizations engaged in the development, repair and tuning of motor vehicles and their systems.

Keywords

• car radiator
• heat transfer coefficient
• air flow rate