be described below as described above the operation is controlled by the hev power train controller 14 executing the control routines rh 1 through rh 5 and by the engine controller 15 executing the control routines re 6 and re 7 referring to fig1 and 19 there are shown changes of the various parameters processed during the engine stopping mode and described above with reference to fig1 13 and 15 at time t 1 the desired engine power p eng u2014 d is determined not greater than the first reference engine power p eng u2014 1 at the step s 106 of the routine rh 1 executed by the hev controller 14 and shown in fig1 and the engine running flag f eng u2014 run is reset a the step s 107 and the first engine stop flag f eng u2014 stop u2014 1 is set high at the step s 108 at the same time the second engine stop flag f eng u2014 stop u2014 2 is set high at the step s 604 of the routine re 6 executed by the engine controller 15 and shown in fig1 as a result the hev power train 1 has entered the engine stopping mode from the engine running mode at the time t 1 during the engine running mode before the time t 1 the first electric machine 3 generates electricity to brake the engine 2 and achieve the operational engine speed n eng u2014 o determined at the step s 204 of the routine rh.