Automotive mass air flow (MAF) sensors are one of the chief components of the electronic fuel injection system in an automobile. The MAF sensor is installed between the intake manifold and air filter of the car engine. The main function of the MAF sensor is to measure the mass air flow or the amount of air that enters an internal combustion engine. Information related to mass air flow in an engine is necessary for the engine control unit for balancing and delivering the correct fuel mass to the engine. In the automobile applications, air density varies with respect to the use of forced induction, ambient temperature and altitude. Therefore, mass air flow sensors are more appropriate in automotive applications in comparison to volumetric flow sensors for the purpose of determining the quantity of air intake in each cylinder. Mass air flow sensors do not have any moving parts, unlike a vane air flow meter which uses a sprig loaded flop. MAF sensors make use of electrical current to measure airflow. In many cases, intake air temperature sensor and oxygen sensor is also installed along with the mass air flow sensor. When mass air flow sensor function in conjunction with an oxygen sensor, the air/fuel ratio of the engine can be accurately monitored and controlled.
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The global automotive mass air flow sensors market is being primarily driven by the benefits offered by these sensors including, improved engine performance, superior engine control, fast response time, high resistance and durability and low airflow restriction among others. Further, increasing vehicle production globally is strongly boosting the market growth of MAF sensors. However, common signs of problems associated with mass air flow sensors include running lean under load or rich at idle, rough stalls and decrease in fuel efficiency.
The global automotive mass air flow (MAF) sensors market can be segmented on the basis of types into hot wire and hot film. Despite being slightly different in design, both these types of MAF sensors measure the density and volume of entering the engine in order to calculate the amount of fuel required to maintain the proper fuel mixture. Hot-wire type of mass air flow sensors are most commonly used in the modern automobiles owing to the benefits associated with this type including, low airflow restriction, smaller overall packages, quick response to changes in airflow, low cost and no requirement for separate temperature and pressure sensors among others.
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Based on the design of MAF sensors, the market can be bifurcated into variable voltage output (analog) design and frequency output (digital) design. Both these designs work on the hot wire principle and their operation is similar. The outputs from both can be measured using a scanner or a dvom (digital volt/ohm) meter which can measure frequency. The global automotive mass air flow (MAF) sensors market can be further classified geographically into North America, Europe, Asia Pacific, South America and Middle East and Africa. There is strong growth potential for the market in the emerging countries of Asia Pacific, Latin America and the Middle East. Asia Pacific is projected to be the fastest growing market for automotive intake manifolds during the forecast period, with China and Japan being the main contributors to the market in this region.
Some of the major players in the global automotive mass air flow (MAF) sensors market include Robert Bosch GmbH, Denso Corporation, Delphi Automotive PLC, Dorman, Hitachi Automotive Systems Ltd. and ACDelco among others. The key players in the global market are heavily investing in innovations and research and development activities to manufacture mass air flow sensors that ensure improved engine performance coupled with low levels of harmful emission from the automobile with maximum fuel efficiency.
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