1. Gasoline Systems
General-purpose actuator
The air supply to the engine is as important as the fuel
supply for the combustion of the air-fuel mixture. The
air-to-fuel ratio, the air movement and the composition
of the intake air contribute to clean, economical and
dynamic engine operation. This is why the air supply
is regulated with the help of flaps and valves.
Task
Electronic actuators such as the general-purpose
actuator (GPA) enable high-precision air supply. This
actuator is used for adjusting flaps and valves in the
intake tract. The precise control of the actuator allows
to reduce fuel consumption, CO2 output and other
emissions by means of cylinder-charge control.
Function
The GPA is an electric motor with a transmission. It
allows components in the intake tract to be adjusted
by rotating its drive shaft, for instance rotating flaps or
lifting and lowering valves. A position feedback sensor
is included. Each GPA is individually adjusted to the
zero position in order to ensure high accuracy. The
GPA fulfills the specifications for OBD2 on-board
diagnosis.
Customer benefits
▶ All-in-one component instead of several parts
(vacuum cell, switching valve, lever arrangement)
▶ Overall system know-how
▶ GPA-1CM at the intake manifold
– Flexibility regarding design adaption
– Packaging
– Continuous position control
– Independent from onboard vacuum systems
– Improved diagnosis
▶ GPA-VTG for variable turbine geometry
– Flexibility regarding design adaption
– Improved drivability of high-end engines with
high current forces, due to better actuating
forces at all operating points
– Higher engine efficiency due to fast actuation,
precise control and less hysteresis
▶ GPA-WG for the wastegate valve
– Competitive scalability
– Modular portfolio covering the entire market
– Rapid torque build in downsized engines
– High permanent force for closed and open
position
– Increased fuel economy and CO2 reduction
General-purpose actuator GPA
