On the possibility of increasing the power of an automotive diesel engine when cooling the fuel

Abstract

The diesel engine D-243 (type 4Ch 11/12.5) installed on the agricultural tractor Belarus-82.1 was investigated. The research was carried out on a computer model of the diesel engine implemented in the specialized software “RK-Diesel”. The temperature (T) of fuel in the atomizer of the injector changed in the range from +107 to +30°C and main, effective parameters of the model operating process and related indices were determined: hourly fuel consumption (G_f) and its cycle supply (g_c). The computer experiment method was used to calculate the following: specific effective fuel consumption (g_e); torque (M_t) and effective power (N_e); average cycle indicator (p_i) and effective pressure (p_e), friction pressure (p_fr); also efficiency coefficients: cycle indicator (η_i), effective (η_e) and mechanical (η_m) coefficients at the nominal diesel engine operation mode (n = 2200 min^-1). It is determined that the power, fuel consumption and cycle feed rate steadily increase as the fuel cools. It is shown that during fuel cooling in the studied temperature range, the power (N_e) maximizes by 17.7%. In this case, the specific effective fuel consumption (g_e) is reduced by 1.65 g (kW×h).