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...Technical Information Throttle-valve housings General points Throttle valves are installed between induction bridge and load sensor. Throttle valves control the air flow suctioned in by the engine. The mixing ratio of fuel and air is changed by the throttle valve's opening angle. T...

...Technical Information Exhaust gas recirculation system(EGR) General To achieve exhaust emission reductions, some vehicles, are fitted with an exhaust gas recirculation system. This system is controlled by the ECU and the EGR valve. Function Due to the recirculation of a part of...

...Electrical exhaust gas recirculation valve Failure causes and troubleshooting General information EGR valves are installed in a bypass channel between the intake manifold and the exhaust manifold. Recirculating part of the exhaust gas volume can reduce emissions of nitrogen oxides (N...

...Technical Information Fault code given as hexadecimal number Conversion of hexadecimal numbers to decimal numbers In the world of programming and computer technology, so-called hexadecimal numbers are used as well as binary number codes (comprising 0 and 1). The hexadecimal system do...

...Technical Information External alternator control units As vehicle electric systems become more and more complex, simple alternator regulation is usually no longer sufficient. For this reason, some vehicle manufacturers (e.g. Ford, BMW, Mazda, Peugeot) have integrated so-called intell...

...Technical Information Housing for rear view camera systems General notes Some time ago, Hella launched two rear view camera systems. The desire was however expressed for the possibility of integration into a lighting function or a housing. In order to offer customers better int...

...Technical Information Idle speed control valve General The idle speed control valve is bypass valve. Example, as shown, is for Opel. It is made of a cast housing with a magnetic valve servo unit. A jet stem is fitted to the servo unit. Through the movement of the servo unit th...

...Technical Information Ignition module (Trigger box) General The ignition module contains the closed -loop primary current control circuit and the dwell-angle control. They are built with hybrid technology. This has the benefit that they can be built together with the igniti...

...Technical Information Injectors General Injectors have the task, during all driving conditions, to inject the correct amount of fuel calculated by the ECU. For good fuel atomisation and small condensation loss an engine specific distance to the inlet valve and injection angle a...

...Technical Information Inlet Air Temperature (IAT) Sensor General IAT sensors sense the air temperature on the inlet side of the engine. The voltage signal, produced by the sensor, is passed to the ECU. The ECU evaluates the signal and influences the fuel injection timing and ignition t...



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