Bosch mechanical fuel injection

E1033497

Bosch mechanical fuel injection is a precision-engineered, cam-driven fuel delivery system widely used in mid-20th-century Mercedes-Benz engines for reliable, high-performance metering of gasoline.

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Predicate Object
instanceOf fuel metering system
mechanical fuel injection system
actuation cam-driven
advantage better throttle response than carburetors
improved fuel distribution between cylinders
more accurate mixture control than carburetors of its era
reduced fuel starvation under high lateral acceleration compared with carburetors
stable operation over a wide range of engine speeds
application Mercedes-Benz M116 engine (early versions)
Mercedes-Benz M117 engine (early versions)
Mercedes-Benz M127 engine
Mercedes-Benz M129 engine
Mercedes-Benz M130 engine
Mercedes-Benz M198 engine
controlType mechanical
currentUse historic racing vehicles
restored classic cars
designGoal high performance
precise fuel metering
reliability
eraOfWidespreadUse mid-20th century
feature barometric and temperature compensation in some versions
camshaft within pump housing to actuate plungers
individual plunger-and-barrel elements per cylinder in many versions
mechanical fuel pump driven by engine
mechanical governor in many applications
rack-and-gear mechanism to vary fuel quantity
separate high-pressure lines to each injector
fuelType gasoline
influencedBy Bosch diesel inline injection pump technology
injectionType port fuel injection
maintenanceRequirement precise calibration on specialized test stands
manufacturer Robert Bosch GmbH
linked to: Bosch
notableModel Bosch PES inline pump family
Bosch PL mechanical port injection pump family
notableUse Mercedes-Benz engines
operatingPrinciple fuel quantity controlled by stroke of plungers
positive-displacement pumping of metered fuel charges
primaryUse automotive engines
replacedBy Bosch D-Jetronic electronic fuel injection in many Mercedes-Benz models
Bosch K-Jetronic continuous injection system in later applications
status largely obsolete in modern mass-production gasoline engines
typicalInjectionPressure higher than contemporary carbureted fuel systems
usedInVehicle Mercedes-Benz 220 SE (W111)
Mercedes-Benz 230 SL (W113)
Mercedes-Benz 250 SL (W113)
Mercedes-Benz 280 SL (W113)
Mercedes-Benz 300 SE (W112)
Mercedes-Benz 300 SL (W198)
Mercedes-Benz 450 SL (early R107, certain markets)

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Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

M100 fuelSystem Bosch mechanical fuel injection
Bosch mechanical fuel injection notableModel Bosch PES inline pump family
linked to: Bosch mechanical fuel injection
Mercedes-Benz M100 engine family fuelSystem Bosch mechanical fuel injection (early)
linked to: Bosch mechanical fuel injection