IGNITION TIMING CONTROLLER FOR AN ENGINE

摘要

An internal combustion engine with variable spark ignition timing is provided with an air intake passage, an oil pressure system and a speed responsive device. To vary the ignition spark timing there is provided a housing enclosing primary and secondary levers connected to each other at one end by a link pivoted at opposite ends thereto. The primary lever has a fulcrum moved by the expansion of a chamber connected to the air intake passage and is in turn connected to a servo mechanism actuated by oil pressure and in turn varying the spark ignition timing. The secondary lever has a fixed fulcrum and at the other end from the link is connected to an expansible chamber responsive to the speed responsive device. In an alternate version the fixed fulcrum of the secondary lever is replaced by an expansible chamber connected to an engine temperature responsive device. In another version, the servo mechanism is overridden by a plunger responsive to the engine starting cycle. In a fuel injection engine, the servo mechanism output is connected to the fuel injection timer.