Gravitational mechanism of quantization and solitons

There are examples of nonlinear vector models, in which solitons can have only electric charge, which is multiple of the electron charge. Such examples of quantization are not directly related to quantum theory, as they do not contain the Planck constant ℎ. In the present work an attempt is made to compensate for the above-mentioned gap and to use the gravitational field for this purpose. The original gravitational mechanism of quantization is suggested. On the basis of analysis of soliton diffraction on rectilinear slot the conclusion is made on the validity of soliton modelling of elementary particles as lengthy objects, although the standard interpretation of solitons as quasiclassical multiparticle excitations is not excluded