Tuesday, Jun 08, 2004 at 11:39
Klaus,
The altitude compensator is found on some injection pumps, even in Australia.
It is a small diafragm which is calibrated at sea level, when you claim to higher altitudes it reduces the fuel load to avoid black smoking.
It is however a thing of the past as the introduction of turbos and aneroids on most engines do away with the compensator.
On more recent engines everything is controlled electronically.
The aneroid is a diafragm that changes the fuel load based on boost.
On electronic models there is an air flow sensor and a boost sensor that feed that info to the ECU and fuel load is controlled that way.
Turbo charged engines with an aneroid still suffer from excesive fuel load at high altitudes until the boost comes up (usually starting of from a
hill they will emmit a puff of smoke which dissapears as the engine revs up and boost is generated)
William
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