ra0701601k010x

0010 - Function of the injection system K. Atmospheric pressure-dependent full-load stop (ADA) (note deviations for off-road vehicles) Engines 601, 602.91, 603.91

Tipo ra · tema 07.11 · versione 9605 · 1996-01-29

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Collocazione

Gruppo funzionale 1 Motore › 07 Preparazione della miscela › 07.11 Sistema di iniezione diesel pompa di iniezione in linea e regolazione meccanica (M/RSF) — Serie 601 · Serie 602 (modelli 91*)

Valido anche per motori/cambi: 603 91*

07.1-010 Function injection system

K. Atmospheric pressure-dependent full-load stop (ADA)

0010 - Function of the injection system K. Atmospheric pressure-dependent full-load stop (ADA) (note deviations for off-road vehicles) Engines 601, 602.91, 603.91

The atmospheric pressure-dependent full-load stop serves to correct the low air density at higher altitudes.

Mode of operation with a reduction of pressure with increasing altitude. With diminishing pressure the aneroid boxes (103b) expand, pushing the ADA correction linkage (103c) in direction (c). The ADA guide pin (5b) continues to push the ADA correction linkage (103c) in the direction of (c), pivoting the ADA template (5c) in

the direction of (d).
With the ADA template the toggle lever (5c) and the reverse-transfer lever (5d) pivot in the directions of (e) and (d). The reverse-transfer lever now pulls the control rod (2t) in stop direction (b) via the fulcrum lever (2d).
In this way the pressure drop causes a reduction of the full-load volume.

A pressure rise results in the process taking place in reverse order.

The atmospheric pressure-dependent full-load stop consists of aneroid boxes vertically installed in a housing, and which have been adjusted to a certain barometric level by means of an adjusting screw and counteracting spring-loaded threaded pin. Within the operating range of the aneroid boxes an expansion takes place with decreasing air pressure. The spring-loaded threaded pin on the lower side of the aneroid boxes and the connected levers transmit the changes in altitude to the control rod of the injection pump.

0010 - Function of the injection system K. Atmospheric pressure-dependent full-load stop (ADA) (note deviations for off-road vehicles) Engines 601, 602.91, 603.91

If the aneroid boxes expand, the control rod is pulled in the direction of "stop" and the delivery volume is reduced; if the altitude decreases, the control rod is moved into the direction of "additional volume", resulting in an increase of the delivery volume.

5c Template

103 Pressure box

103a Connection for atmospheric connection line (for registering atmospheric pressure)

103b Aneroid boxes

103c Correction linkage

103d Adjusting screw (adjusted by manufacturer)

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