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对于内燃机车柴油机来说,供油和供气的协调问题是主要问题之一。在每一给定的稳定工况下,速度功率联合调节器能保证柴油机气缸有稳定的循环供油量。而合适的供气量则取决于大气条件、涡轮增压器状况、燃气管路中的积炭程度和其它因素。此外,柴油机供气系统的惰性比供油系统的大,因而导致过渡工况下空气和燃油在数量上不相适应。在内燃机车运用条件下,涡轮增压柴油机的这些特点使过量空气系数偏离最佳值,从而降低了经济性,增大了热应力和排气烟度。
For diesel locomotives, the coordination of fuel supply and gas supply is one of the major issues. Under each given steady state condition, the combined speed and power regulator can ensure a stable cycle fuel supply for the diesel engine cylinder. The proper amount of air supply depends on the atmospheric conditions, turbocharger conditions, degree of coke in the gas pipeline and other factors. In addition, the inertness of the diesel engine’s air supply system is greater than that of the fueling system, resulting in a quantitative mismatch of air and fuel in transitional conditions. These features of turbocharged diesel engines deviate excess air coefficients from optimum values for diesel locomotive applications, reducing economy and increasing thermal stress and exhaust smoke levels.