Bosch Mono-Jetronic

[atsakiri at ford.com]

> The system consists of a single injector in the throttle body, an inlet air
> temp sensor, a throttle position sensor, a servo to control the throttle at
> idle (idle speed), a water temp sensor and a lambda sensor. And engine rpm
> info is sent to the system from the ignition computer.
> 
> Question 1: How? As I understand things, you need to know the load on the
> engine. How does this system find the load? Perplexing. The only thing I can
> think of is that the mixture is controlled by the closed loop system, even
> under acceleration etc. But would the lambda sensor be fast enough? Would a
> slow lambda sensor then cause a flat spot? Ooooh, my head hurts :-)

Perhaps load is determined from engine speed, throttle position, and
barometric pressure (though there's no mention of a barometric pressure
sensor above).  The breathing characteristics of the engine could be
mapped quite well as a function of these parameters.


Anthony Tsakiris

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The opinions expressed are my own and not necessarily those of my employer.