Maserati Ghibli - Mild Hybrid System Information (2.0 L4 MHEV only)

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Understanding the Vehicle
Mild Hybrid System
Information (2.0 L4 MHEV
only)
System Components
The mild hybrid system installed on
the MHEV model, in addition to the
traditional gasoline thermal engine,
is composed of the following main
components:
1 Belt Starter Generator (BSG) 48 V
installed on the thermal engine
RH side.
2 eBooster 48 V with flap-valve in
front of the thermal engine.
3 Hybrid system ECU in the engine
compartment RH side.
4 48 V connecting cable.
5 48 V Li-Ion Battery housed in the
luggage compartment.
6 48 V/12 V DC/DC converter on the
48 V battery.
7 Fan battery cooling.
8 Cooling ducts.
9 Air intake grill.
The 48 V battery containing twelve
lithium ion cells that needs no
maintenance. The battery housing
also contains a battery control and
supervision unit, a relay, a fuse, a
shunt resistor, two temperature
sensors and a pressure balancing unit.
The main functions of the battery
system are to store the electrical
energy supplied by the 48 V power
supply during braking and returns it
to the system when the electric motor
starts operating parallel to the thermal
engine.
During its operation, the 48 V battery
can develop heat which is dissipated
using a fan and a series of ducts. The
fan sucks the air from the passenger
compartment through a air intake
grill located on the left side of the
rear parcel shelf and then directs
it through ducts to the battery. To
ensure the cooling of the 48 V battery
it is important that the air intake
remains free.
The BSG is driven by the crankshaft by
means of a belt and is at the same
time able to perform the function of
current generator and that of electric
motor, also with the function of
starter motor for the thermal engine
in some situations such as in the
phases Start&Stop. In the latter case,
after stopping the car in a stop and
automatic engine shutdown with the
Start&Stop system, re-ignition occurs
through the BSG. The traditional
starter motor is used only for the first
ignition of the car, when you have
power from the 12 V battery, which is
certainly charged, and more power is
needed.
When acting as an electric motor,
the mild hybrid system provides
additional power to the thermal
engine at start-up, when starting from
a standstill or when there is a demand
for greater drive torque, or in the