K-jetronic

A commonly used mechanical fuel injection system made by Bosch in which the amount of fuel injected continuously under pressure into the inlet ports is controlled by an airflow meter. Term used by Bosch to describe the original continuous injection system. The K is short for kontinuerlich, continuous. Airflow is measured by a circular plate inside the airflow sensor part of the mixture control unit. Fuel delivery was purely mechanical, in relation to airflow, until 1980, i.e., there were no electronics used in the K-Jet system. VW, Audi, and Mercedes call it CIS

K-Jetronic with Lambda

Second-generation K-Jet system, which began in 1980, uses a feedback loop consisting of an oxygen sensor and a control unit to provide some electronic control of the air-fuel mixture. This system is also called CIS with Lambda Lambda is the Bosch term for an oxygen sensor

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