Ecotronic power supply system of the car BMW 5 Series E12
Scheme of the Ecotronic system System Diagram «Ecotronic»: 1 - carburetor; 2 - throttle potentiometer of the 1st chamber; 3 - air damper servo; 4 - throttle servo drive of the 1st chamber...
Functional diagram of the Ecotronic system controller Functional diagram of the system controller «Ecotronic»: 2 - throttle potentiometer of the 1st chamber; 3 - air damper servo; 4 - throttle servo of the 1st...
Appearance and description of the carburetor 2BE The appearance of the carburetor 2BE: 2 - throttle potentiometer of the 1st chamber; 3 - air damper servo; 4 - throttle servo of the 1st chamber; 12 — throttle...
Scheme of air routes Air lines scheme: 1 - the place of connection of the temperature sensor block in the cabin (on vehicles with electronic heating); 2 - air filter; 3 - air valve...
The scheme of heating the air entering the carburetor Scheme of heating the air entering the carburetor: A - cold air supply channel; B - channel for supplying warm air; 1 - damper; 2 - heat-sensitive element; 3 -...
Intake air circuit diagram Intake air circuit diagram: 1 - carburetor; 2 - throttle servo of the 1st chamber; 3 — pneumatic actuator of the throttle valve of the 2nd chamber; 4 -...
The main parts of the carburetor 2BE «Ecotronic» The main parts of the carburetor 2BE «Ecotronic»: 1 - throttle body with throttle position potentiometer of the 1st chamber; 6 - quality adjusting screw...
Description of the carburetor Pierburg 2BE Ecotronic Carburetor 2BE, developed by Pierburg (carburetor with accessories) and Bosch (controller and intake air temperature sensor), equipped with an electronic...
Features of the controller device The controller is a specialized digital microcomputer. Functionally, ohm consists of three electronic circuits for processing electrical signals («Entrance»,...
Description of the controller Engine idle control The idle speed of the engine is controlled regardless of the degree of engine running-in (friction torque values), intake air temperature...
Description of mixture formation in a 2BE carburetor Fuel supply system The constancy of the fuel level in each of the carburetor float chambers is ensured by adjusting the action of the floats on the needle...
Air damper servo Withdrawal Remove the air filter. Disconnect the air damper servo connector. Remove the air damper servo by unscrewing the four screws securing its flange....
Checking freedom of movement of the air damper servo The freedom of movement of the choke servo can be checked on the vehicle or on the removed carburetor. In the latter case, the carburetor must be placed in a...
Throttle valve servo 1st chamber Warning. When checking and adjusting the throttle servo of the 1st chamber, it is forbidden to supply voltage (12 V) to plugs «4», «5» And «7» servo connector...
Checking the idle switch Connect tester (in ohmmeter mode) to the plugs of connector 1 of switch 2 and measure the resistance, which, when the switch is opened, (when the throttle...
Checking vacuum and atmospheric valves This check is carried out in the same way as on the removed throttle servo of the 1st chamber ( see above ). Potentiometer test Connect tester (in ohmmeter...
Adjustment of the throttle servo of the 1st chamber Disconnect the connector from the intake air temperature sensor built into the intake manifold (to simulate a warm engine). Turn on the ignition without...
Checking the air valve of the engine braking system Disconnect from a branch pipe 2 the valve a hose 4 going from the air filter. Start the engine and bring the engine speed to 3000 rpm, then release the...
Checking the throttle actuator of the 2nd chamber Make sure that there are no foreign particles in the suction pipe on the carburetor and the condition of the vacuum hose connecting the carburetor to the...
Checking the thermostatic valve Note. The thermostatic valve has a throttling hole that allows air to bypass when the valve is closed. Attach a hand vacuum pump to the valve port as shown. At...
Carburetor fuel inlet filter Before flushing the carburetor, remove the inlet fuel filter by screwing an M3 bolt into it to a depth of about 5 mm. After flushing the carburetor, install a...
Checking the fuel level in the float chambers Remove the carburetor cover. Measure with a ruler the distance between the parting plane of the cover and the highest point of the float (while the float...
Throttle body The position of the throttle valves in the housing supplied as spare parts is adjusted at the factory and should not be changed during operation. After...
Throttle Actuator Adjustment Vehicles with manual gearbox Set the throttle valve of the 1st chamber to the position corresponding to the engine braking mode. To do this, start the engine...