Honda ACCORD HYBRID 2005 Service Manual page 695

Engine start
The IMA system drives the IMA motor, starts the engine at normal start, and restarts the engine after auto-stop. The
IMA motor is directly connected to the engine crankshaft, so it is quieter than the 12 V starter. If a p r o b l e m occurs w i t h
IMA system, for example, low battery module status of charge (SOC), low temperature, faulty IMA system, etc. The
PCM receives a signal f r o m the M C M and starts the engine w i t h the 12 V starter.
ENGINE
Motor assisting function
During acceleration, energy is supplied f r o m the battery module to the IMA motor, and the motor generates a
m a x i m u m torque of 84.3 N-m (8.6 kgf-m, 62 Ibf-ft) to assist the engine. The PCM and M C M c o m m u n i c a t e to control the
assist to maintain the battery m o d u l e SOC w i t h i n a specified range. W h e n the battery module SOC is below the
specified range, the M C M stops the assist to prevent over-discharge or damage to the battery. Assist is also not
available w h e n the IMA battery is very cold or very hot.
ENGINE
BATTERY
MODULE
MPI
Regenerative control (at deceleration)
During deceleration, the IMA motor, driven by the wheels, functions as a generator, it charges the battery module by
generating electrical energy. This is done by converting the kinetic energy of the vehicle during braking into electric
energy that is stored in the IMA battery. W h e n the battery module is f u l l , regeneration stops to prevent overcharge of
the battery.
ENGINE
BATTERY
MODULE
MPI
(cont'd)
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