| 摘要 |
An altitude compensation ignition system for compensating ignition timing of an internal combustion engine depending upon variations in altitude or atmospheric pressure comprises pressure sensitive compensation means consisting of a bellows whose ends are fixed to a distributor and a vacuum advance device and adapted to be elongated and shortened in response to variations in atmospheric pressure. When the atmospheric pressure is lowered, the bellows is elongated to move a contact point relative to a rotor of the distributor, thereby advancing the ignition timing.
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