  In this paper, we have investigated the phenomenon of accelerated cosmic
expansion in the late universe and the mass accretion process of a
4-dimensional Einstein-Aether black hole. Starting with the basics of
Einstein-Aether gravity theory, we have first considered the field equations
and two eminent models of Chaplygin gas, viz. generalized cosmic Chaplygin gas
model and viscous modified Chaplygin gas model. Then, we obtained the energy
density and Hubble parameters equations for these models in terms of some
dimensionless density parameters and some unknown parameters. After finding the
required parameters, we proceeded with the mass accretion process. For both
models, we obtained the equation of mass in terms of the redshift function and
represented the change of mass of the black hole graphically with redshift. At
the same time, we have made a graphical comparison between the above-mentioned
models and the $\Lambda$CDM model of the universe. Eventually, we have
concluded that the mass of a 4-dimensional black hole will increase along the
universe's evolution in the backdrop of Einstein-Aether gravity.
