BMW 3: Drive Components
BMW 3 Series G20 (2018-2026) Training manual / Drive Components
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Introduction
In the G20 PHEV, the B46B20O1 is an element of the BMW hybrid drive. The
4-cylinder engine,
which generates power of 135 kW (180 hp) and a maximum torque of 300 Nm,
guarantees mo
Fuel supply
For the operation of the combustion engine, the G20 PHEV is equipped with a
pressurized fuel
tank. As a result during purely electric driving it is guaranteed that the
gasoline fumes remain in
Components and their installation location
G20 PHEV components of the fuel supply in European version
Carbon canister
Pressurized fuel tank (in cast aluminum housing)
Fuel filler flap with cover
Fuel tank isolation valve
Cable for
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Automatic deactivation of
the front-seat passenger
airbags
Concept
The system reads if the front passenger seat is
occupied by measuring the human body's resistance.
Front, knee, and side airbag on the front passenger's
side are activated or deactivated.
General information
Before transporting a child on the front passenger
seat, refer to the safety inform
Monitoring functions
High-voltage interlock loop
The SME control unit evaluates the signal of the high-voltage interlock loop
and checks whether there
is an open circuit with this circuit. In the event of an open circuit, the
battery management electronics
control unit can cause the high-voltage system to perform a qu
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