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Ecotronic power supply system of the car BMW 5 Series E12
Scheme of the Ecotronic system
Scheme of the "Ecotronic" system: 1 - carburetor; 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo...
Scheme of the "Ecotronic" system: 1 - carburetor; 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo...
Functional diagram of the Ecotronic system controller
Functional diagram of the Ecotronic system controller: 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo...
Functional diagram of the Ecotronic system controller: 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo...
Appearance and description of the 2BE carburetor
External appearance of the 2BE carburetor: 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo drive; 12 —...
External appearance of the 2BE carburetor: 2 — 1st chamber throttle potentiometer; 3 — air damper servo drive; 4 — 1st chamber throttle valve servo drive; 12 —...
Air route diagram
Air route diagram: 1 — place of connection of the block of the temperature sensor in the cabin (on cars with electronic heating system); 2 - air filter; 3 —...
Air route diagram: 1 — place of connection of the block of the temperature sensor in the cabin (on cars with electronic heating system); 2 - air filter; 3 —...
Scheme of heating the air entering the carburetor
Scheme of heating the air entering the carburetor: A - cold air supply duct; B - warm air supply duct; 1 — damper; 2 - heat sensitive element; 3 - thermostat...
Scheme of heating the air entering the carburetor: A - cold air supply duct; B - warm air supply duct; 1 — damper; 2 - heat sensitive element; 3 - thermostat...
Intake air circulation diagram
Intake air circulation diagram: 1 - carburetor; 2 — 1st chamber throttle valve servo drive; 3 — pneumatic drive of the throttle valve of the 2nd chamber; 4 -...
Intake air circulation diagram: 1 - carburetor; 2 — 1st chamber throttle valve servo drive; 3 — pneumatic drive of the throttle valve of the 2nd chamber; 4 -...
Main parts of the 2BE «Ecotronic» carburetor
Main parts of the 2BE "Ekotronic" carburetor: 1 — throttle body with throttle position potentiometer of the 1st chamber; 6 — adjusting screw for idle mixture...
Main parts of the 2BE "Ekotronic" carburetor: 1 — throttle body with throttle position potentiometer of the 1st chamber; 6 — adjusting screw for idle mixture...
Description of the carburetor Pierburg 2BE «Ecotronic»
Carburetor 2BE, developed by Pierburg (carburetor with auxiliary elements) and Bosch (controller and sensor for incoming air temperature), equipped with an...
Carburetor 2BE, developed by Pierburg (carburetor with auxiliary elements) and Bosch (controller and sensor for incoming air temperature), equipped with an...
Features of the controller device
The controller is a specialized digital microcomputer. Functionally, it consists of three electronic circuits for processing electrical signals ("Input",...
The controller is a specialized digital microcomputer. Functionally, it consists of three electronic circuits for processing electrical signals ("Input",...
Description of the controller operation
Engine idle speed control The engine idle speed is regulated regardless of the engine running-in stage (values of friction moment), intake air temperature and...
Engine idle speed control The engine idle speed is regulated regardless of the engine running-in stage (values of friction moment), intake air temperature and...
Description of mixture formation in the 2BE carburetor
Fuel supply system The constancy of the fuel level in each of the carburetor float chambers is ensured by regulating the action of the floats on the needle...
Fuel supply system The constancy of the fuel level in each of the carburetor float chambers is ensured by regulating the action of the floats on the needle...
Maintenance, inspection and adjustment of the 2BE carburetor
Before proceeding to check and adjust the 2BE "Ekotronik" carburetor, it is necessary to make sure that the controller is in good condition and check the wires...
Before proceeding to check and adjust the 2BE "Ekotronik" carburetor, it is necessary to make sure that the controller is in good condition and check the wires...
Throttle valve potentiometer 1st chamber
Removal Disconnect the throttle valve potentiometer connector No.1. Remove the potentiometer holder by unscrewing the mounting screw. Remove the potentiometer,...
Removal Disconnect the throttle valve potentiometer connector No.1. Remove the potentiometer holder by unscrewing the mounting screw. Remove the potentiometer,...
Checking the total resistance of the throttle potentiometer of the 1st chamber
Remove the potentiometer. Check if the potentiometer drive lever moves freely: it should turn 90°. Check if the return spring is "sagging". Connect the tester...
Remove the potentiometer. Check if the potentiometer drive lever moves freely: it should turn 90°. Check if the return spring is "sagging". Connect the tester...
Checking the sliding resistance of the throttle potentiometer of the 1st chamber
Note: This test is performed on the vehicle. Connect the tester (in ohmmeter mode) to the benefits of "A" and "S" potentiometer. Fully extend the throttle...
Note: This test is performed on the vehicle. Connect the tester (in ohmmeter mode) to the benefits of "A" and "S" potentiometer. Fully extend the throttle...
Air damper servo drive
Removal Remove the air filter. Disconnect the air damper servo connector. Remove the air damper servo by unscrewing the four screws securing its flange....
Removal Remove the air filter. Disconnect the air damper servo connector. Remove the air damper servo by unscrewing the four screws securing its flange....
Checking the freedom of movement of the air damper servo drive
The freedom of movement of the air damper servo can be checked on the car or on a removed carburetor. In the latter case, the carburetor must be placed in a...
The freedom of movement of the air damper servo can be checked on the car or on a removed carburetor. In the latter case, the carburetor must be placed in a...
Throttle actuator 1st chamber
Warning: When checking and adjusting the 1st chamber throttle servo, do not apply voltage (12V) to the "4", "5" and "7" plugs of the servo connector to avoid...
Warning: When checking and adjusting the 1st chamber throttle servo, do not apply voltage (12V) to the "4", "5" and "7" plugs of the servo connector to avoid...
Checking the removed 1st chamber throttle servo
Removal the servo drive Remove the air filter. Disconnect the servo connector. Disconnect the vacuum and atmospheric valve hoses from the servo drive....
Removal the servo drive Remove the air filter. Disconnect the servo connector. Disconnect the vacuum and atmospheric valve hoses from the servo drive....
Checking the throttle actuator of the 1st chamber on the car
Checking for leaks Apply 12V to pins "2" and "3" of the servo connector (polarity does not matter). In this case, the vacuum valve should switch with a...
Checking for leaks Apply 12V to pins "2" and "3" of the servo connector (polarity does not matter). In this case, the vacuum valve should switch with a...
Checking the idle switch
Connect the 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...
Connect the 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 the vacuum and atmospheric valves
This check is carried out in the same way as on the removed throttle servo drive of the 1st chamber ( see above ). Potentiometer check Connect the tester (in...
This check is carried out in the same way as on the removed throttle servo drive of the 1st chamber ( see above ). Potentiometer check Connect the tester (in...
Replacing the air filter of the throttle actuator of the 1st chamber
The air filter is installed in the atmospheric pressure supply channel of the servo drive. To replace the filter: screw the M4 bolt into the filter cover and...
The air filter is installed in the atmospheric pressure supply channel of the servo drive. To replace the filter: screw the M4 bolt into the filter cover and...
Replacing the check valve of the throttle valve servo of the 1st chamber
The check valve is installed in the vacuum supply channel to the servo drive. The main parts of the check valve are the diaphragm 1, piston 2 and spring 3. To...
The check valve is installed in the vacuum supply channel to the servo drive. The main parts of the check valve are the diaphragm 1, piston 2 and spring 3. To...
Adjusting the throttle valve servo of the 1st chamber
Disconnect the connector from the intake air temperature sensor built into the intake manifold. Short-circuit the sensor terminals (in order to simulate a warm...
Disconnect the connector from the intake air temperature sensor built into the intake manifold. Short-circuit the sensor terminals (in order to simulate a warm...
Checking the air valve of the engine braking system
Disconnect hose 4 coming from the air filter from valve branch 2. Start the engine and bring the crankshaft speed to 3000 rpm, then release the accelerator...
Disconnect hose 4 coming from the air filter from valve branch 2. Start the engine and bring the crankshaft speed to 3000 rpm, then release the accelerator...
Checking the pneumatic drive of the throttle valve of the 2nd chamber
Make sure there are no foreign particles in the vacuum take-off pipe on the carburetor and the condition of the vacuum hose connecting the carburetor to the...
Make sure there are no foreign particles in the vacuum take-off 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 throttle hole that allows air to pass through when the valve is closed. Attach a hand vacuum pump to the valve branch pipe...
Note: The thermostatic valve has a throttle hole that allows air to pass through when the valve is closed. Attach a hand vacuum pump to the valve branch pipe...
Carburetor fuel inlet filter
Before washing the carburetor, remove the inlet fuel filter by screwing the M3 bolt into it to a depth of about 5 mm. After washing the carburetor, install a...
Before washing the carburetor, remove the inlet fuel filter by screwing the M3 bolt into it to a depth of about 5 mm. After washing the carburetor, install a...
Adjusting the initial position of the throttle valve of the 2nd chamber
Install indicator 3 on the carburetor (see picture), resting its foot against the throttle valve of the 2nd chamber. Loosen the throttle stop screw 1 so that...
Install indicator 3 on the carburetor (see picture), resting its foot against the throttle valve of the 2nd chamber. Loosen the throttle stop screw 1 so that...
Checking and adjusting the opening and closing of the throttle valve of the 2nd chamber
Fully retract the throttle servo pushrod 1st chamber (see the relevant paragraph). In this case, the pneumatic drive of the throttle valve of the 2nd chamber...
Fully retract the throttle servo pushrod 1st chamber (see the relevant paragraph). In this case, the pneumatic drive of the throttle valve of the 2nd chamber...
Checking the fuel level in the float chambers
Remove the carburetor cover. Measure the distance between the cover joint plane and the highest point of the float with a ruler (the float should be in contact...
Remove the carburetor cover. Measure the distance between the cover joint plane and the highest point of the float with a ruler (the float should be in contact...
Removal and installation the carburetor cover
Unfasten the connecting rod 1. Remove the four Phillips-head screws 2 and the Allen-head screw 3 securing the carburetor cover. Remove the 1st chamber throttle...
Unfasten the connecting rod 1. Remove the four Phillips-head screws 2 and the Allen-head screw 3 securing the carburetor cover. Remove the 1st chamber throttle...
Throttle body
The position of the throttle valves in the housing supplied as spare parts is adjusted at the manufacturer and should not be changed during operation. After...
The position of the throttle valves in the housing supplied as spare parts is adjusted at the manufacturer and should not be changed during operation. After...
Adjusting the throttle actuator
Cars with manual transmission Set the throttle valve of the 1st chamber to the position corresponding to the engine braking mode. To do this, start the engine...
Cars with manual transmission Set the throttle valve of the 1st chamber to the position corresponding to the engine braking mode. To do this, start the engine...
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