How does the EHA valve work in a car?
Dictated by the car’s computer, fuel flows through the EHA valve where the fluid is then sifted through smaller holes in the valve, and the fuel distribution ratio can be optimized and corrected for adjustments in driving conditions.
How does the EHA work in a fuel distributor?
The EHA is a small black box that mounts to the side of the fuel distributor by two screws, and has a two-prong electrical connector. There are two small holes in the back of the EHA through which fuel flows, and between these holes (inside of the EHA) is where it works its magic adjustments.
What do I need to adjust my EHA?
If they are too far out of whack, then the EHA can only do so much given its parameters. Generally speaking, to correctly adjust the EHA, it requires a duty-cycle measurement, current measurement at the two prongs of the EHA, and a fuel pressure measurement to measure the differential pressure at the fuel distributor.
Where is the EHA on a Mercedes Benz?
There is an adjustment to the electro-hydraulic actuator (EHA) that hangs off the back side of the fuel distributor. This is the gizmo that takes the commands from the ECU and adjusts the fuel distributor pressure. It’s the “muscle” for the ECU’s “brains”.
The EHA is a small black box that mounts to the side of the fuel distributor by two screws, and has a two-prong electrical connector. There are two small holes in the back of the EHA through which fuel flows, and between these holes (inside of the EHA) is where it works its magic adjustments.
Dictated by the car’s computer, fuel flows through the EHA valve where the fluid is then sifted through smaller holes in the valve, and the fuel distribution ratio can be optimized and corrected for adjustments in driving conditions.
If they are too far out of whack, then the EHA can only do so much given its parameters. Generally speaking, to correctly adjust the EHA, it requires a duty-cycle measurement, current measurement at the two prongs of the EHA, and a fuel pressure measurement to measure the differential pressure at the fuel distributor.
There is an adjustment to the electro-hydraulic actuator (EHA) that hangs off the back side of the fuel distributor. This is the gizmo that takes the commands from the ECU and adjusts the fuel distributor pressure. It’s the “muscle” for the ECU’s “brains”.