It appears this can be made to work, but I am not sure how. Related:
or a 40V schottky plus 18V negative clamp diode (this will be a TVS in series with a rectifier so its forward clamping is eliminated)
What are the parameters of D2 and D3 to be looking at and how to relate them to those of D1 ?
V_sp_pos_max = maximum positive spike (automotive environment)
V_f_D2 = forward voltage for D2
Also, since D1 is a Schottky diode its reverse current will naturally be very high at high temperatures. Do I correctly guess this setup will also protect whatever comes after D1 against reverse currents as well ?
