If an engine is to operate economically and with low emissions, the air taken in and the injected fuel quantity have to be precisely coordinated with one another. This is the job of an air mass sensor. However, if the air mass sensor is soiled or defective, it can supply incorrect input signals to the engine control unit, increasing fuel consumption and exhaust emissions - replacement is then unavoidable. There are various possible consequences of this: misfires, black smoke, retarded acceleration, idling problems including stalling, and increased engine wear due to oil dilution caused by an excessively rich mixture.
Reliable and precise
To guarantee an exceptionally fast and high-precision measurement, modern air mass sensors from Motorservice operate on the hot-film principle. The hot-film sensor is heated to a constant temperature of around 120 - 180°C above ambient temperature. The air cools the hot-film sensor as it flows in. An integrated electronic module then adjusts the heating current so that it is proportional to the air mass and - depending on the version - is transmitted to the engine control unit as a voltage or frequently modulated square-wave signal. Two separate measuring sensors also enable pulsation and return flows that can falsify a measurement to be detected.
Manufacturers generally weld built-in air mass sensors in the flow pipe. Therefore, the two components have to be replaced together in the event of a possible malfunction. This is not the case with some of the models from Motorservice. Here, the plug-in probe is screwed into the flow pipe, which has a manufacturer-specific design. This enables it to be replaced separately. With special tools for replacement of air mass sensors, Motorservice also offers a practical solution for the aftermarket sector. The plug-in probes are also available individually. This saves money and valuable resources.
Alongside the excellent functionality and easy and cost-effective mounting, Motorservice air mass sensors are also impressive when it comes to compatibility. For example, the air mass sensor with item number 7.22684.18.0 can be used for a total of 420 applications (KTyp) for the Volkswagen, Audi, Seat, Škoda and Ford brands. The entire range of Motorservice air mass sensors includes just over 150 articles, which cover a total of more than 5,500 applications worldwide - this opens up a huge potential market of over 170 million vehicles.
As a sales organisation for Rheinmetall Automotive's aftermarket activities, Motorservice acquires a large proportion of its range internally from within the group, including the subsidiaries Kolbenschmidt and Pierburg. The internationally active spare parts specialist also has the know-how of a large international automotive supplier. Customers therefore benefit from products in OE quality.