...or a cable-actuated throttle assembly.
In an electronic type throttle assembly, opening the damper at a certain angle (including idle) provided by an electric motor controlled by the ECU. The computer receives information about the desired throttle opening angle from the gas pedal position sensor, assembled with the pedal itself.
Into the throttle assembly with a throttle cable drive from the gas pedal in addition to the throttle position sensor (see above) built-in idle speed controller. With its help, the ECU slightly opens the throttle, regulating the amount of air entering the engine cylinders at idle.
Fuel pump located in the fuel tank.
It is used to supply fuel under the required pressure from the tank to the fuel rail. If the fuel pump fails, the engine will not start. If the fuel pump electrical circuit is faulty, the engine control system malfunction indicator lamp will illuminate on the instrument panel.
pressure regulatorfuel is located in the fuel tank, designed to maintain a constant pressure in the fuel rail.
When the fuel pressure regulator is faulty, the engine runs erratically. Severe interruptions in operation are also possible with a sharp change in engine operating modes.
nozzles
The nozzle is a needle solenoid valve, on the outlet pipe of which a spray is made (as an example, the nozzle of 1.4 and 1.6 DOHC engines is shown, the nozzle of the 1.8 DOHC engine has minor visual differences from the above).
The injector opens at the signal of the ECU, while pressurized fuel is injected into the intake port, just before the intake valve. By changing the opening time of the injector, the ECU regulates the amount of fuel injected.
There are four injectors on the car. They are installed in the inlet ports of the intake manifold.
Engines 1.4 and 1.6 DOHC
Engine 1.8 DOHC
Adsorber. It is connected by pipelines to the fuel tank and intake manifold and is designed to trap fuel vapors so that they do not enter the atmosphere. The adsorber is located differently:
- on the Astra model in the arch of the right front wing (fender liner removed);
- on the Zafira behind the front bumper in front of the wheel (fender liner removed).
Purge valve adsorber is fixed on the air filter housing.
In certain engine operating modes, the ECU opens the valve, and fuel vapors from the adsorber enter the intake manifold.
ignition module mounted on top of the cylinder head cover (Engine trim removed).
Engines 1.4 and 1.6 DOHC
Engine 1.8 DOHC
The vehicle uses a four-pin ignition module. The outputs of the module are located above each cylinder and are responsible for sparking in each of them.
Exhaust gas recirculation valve mounted on the left side on the cylinder head (Engine trim removed).
Engines 1.4 and 1.6 DOHC
Engine 1.8 DOHC
In certain engine operating modes, the ECU opens the valve and a small part of the exhaust gases enters the intake manifold.
1.8 DOHC engine intake manifold length change systemlocated on the left side of the intake manifold.
The system consists of a pneumatic chamber, an electromagnetic valve and a damper installed in the inlet pipeline. With their help, the ECU regulates the power characteristics at different crankshaft speeds.
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