Improving the energy efficiency of wheeled cars by the method of disconnecting cylinders in a automobile and tractor engine

Abstract

On the question of how much it is most beneficial to turn off the engine cylinders, in order to use the engine power effectively, to keep them running at the same level, the cylinders need to increase the fuel cycle. With a greater cyclic flow in the working cylinders increases the average indicator pressure and improves the combustion process. When you turn off part of the engine cylinders during its operation, the indicated engine power decreases, as a result of which the crankshaft speed and engine torque decrease. The need to improve the efficiency of the engine in a wide range of speed and load modes contributes both to the search for new technical solutions and the development of previously known, well-established ones. This is primarily due to the requirements for fuel efficiency and toxicity of exhaust gases, and in some cases with the need to improve transients in the engine while maintaining other characteristics at the same level or even improving them. The energy diagram of the wheeled vehicle in the nominal mode when driving with a diesel engine is presented. It shows that the cost of own needs is 30-40%. The power consumed by the wheeled vehicle for its own needs is optimized through the use of an adjustable auxiliary drive. The dependence of the efficiency of the wheeled vehicle on the instantaneous realized power is obtained by processing the records of the onboard recorder of motion parameters and an approximation is constructed of the experimentally obtained dependence of the efficiency of the automobile and tractor engine on the power utilization ratio using the least squares method. An algorithm for selecting the number of disabled cylinders depending on the instantaneous power value is proposed. When using the proposed method of controlling the energy efficiency of an automobile and tractor engine when operating at partial load, the on-board computer program from the actual power determines the minimum number of working cylinders required for engine operation.