  We investigate the $\Delta S = 1,2$ effective weak chiral Lagrangian within
the framework of the chiral quark model. Starting from the effective four-quark
operators, we derive the effective weak chiral action by integrating out the
constituent quark fields. Employing the derivative expansion, we obtain the
effective weak chiral Lagrangian to order ${\cal O} (p^4)$. We examine the
contributions of the order ${\cal O} (N_c)$ to the ratio
$g_{\underline{8}}/g_{\underline{27}}$, considering e.g. the quark axial-vector
constant $g_{\rm A}$ different from unity. The low energy constants of the
counterterms are also presented and discussed.
