SSP 094 – Mono-Jetronic

SSP 094 – Mono-Jetronic

INDEX

Mono-Jetronic is an electronically controlled fuel injection system in which only one electromagnetic injector injects fuel at a central location upstream of the throttle valve.
Fuel distribution to the individual cylinders is carried out through the intake manifold, as in a carbureted engine.

Various sensors detect all essential engine operating conditions required for optimal mixture control.
Based on this information, the control unit calculates the actuation signals for the solenoid valve in the central injection unit.

The lambda sensor in the exhaust stream supplies a signal to the control unit whenever the current mixture composition deviates from the ideal air–fuel ratio.
The closed-loop control system influences the injection duration precomputed by the control unit.

This allows the fuel quantity to be metered so precisely that, under all operating conditions, the air–fuel ratio deviates only minimally from the ideal value (λ = 1.0).