-  A valve located in the fuel distributor of some vehicles with a continuous injection system and catalytic converter. This valve continually adjusts the air/fuel ratio to varying engine operating conditions, because it is controlled by a voltage signal supplied by the oxygen sensor and by an ECM.
Dictionary of automotive terms. 2015.
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valve — A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. There are many different types. See ABS relay valve accumultor valve air valve carburetor air control valve air gulp valve … Dictionary of automotive terms
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Lambda valve — In Bosch CIS, a device that regulates pressure in the lower chamber of the differential pressure valve, in response to a signal from the lambda (oxygen) sensor. Also called frequency valve or a timing valve … Dictionary of automotive terms
timing valve — In Bosch CIS, a device that regulates pressure in the lower chamber of the differential pressure valve, in response to a signal from the lambda (oxygen) sensor. Also called Lambda valve (Bosch s term) or a frequency valve … Dictionary of automotive terms
lambda control valve — See frequency valve … Dictionary of automotive terms
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