A method for determining a bulk modulus of elasticity of fuel and / or of a mounting position angle of a high-pressure pump

摘要

The present invention relates to a method for determining at least one quantity from the group comprising a compression modulus (k) of fuel in the case of the use of a high-pressure pump to an internal combustion engine and an attachment position angle of the high-pressure pump, which high-pressure pump driven by means of a shaft and for conveying the fuel from a low-pressure region via a delivery chamber of the high-pressure pump by means of a piston into a high-pressure accumulator is used. In this case, a course (p_E) a pressure in the high-pressure reservoir (18), of a rise in pressure between two pressure plateau (pu, po), is determined, and a model (p_M) for the course of the pressure, which is a volume of the high-pressure reservoir for the fuel, the modulus of compression (k) and geometric dimensions (a, δh) of the high-pressure pump as a parameter, predetermined. With the use of an initial value for the modulus of compression (k) and subsequent adjustment of the model (p_M) by variation of the bulk modulus of elasticity (k) on the determined profile (p_E) , then, the at least one size (k, φ_Ut) determined.n="22"