Optimal Design of a Cam Profile for Diesel Injection Pump

The paper describes a procedure for optimizing the cam profile of a pump in a diesel fuel injection system by employing an approximation method of mathematical programming. The shape of the profile is represented by a Bézier curve and some of the coordinates of the control points are adopted as design variables. The objective function is build upon a target shape of the pump plunger velocity while the imposed constraints are related to the local radius of the cam profile, pump plunger acceleration and to the design variables. The procedure is appropriate to be included into the optimal design procedure of the whole fuel injection system. The theory is illustrated with numerical examples.