Turbo-charged compression ignition engine operable at small compression ratio

摘要

A turbo-charged compression ignition engine having a turbo-charger (40) for supercharging the engine, a mechanism (56, 59) for controlling the timing of closing of the inlet passage (42) of the engine, and an auxiliary cam for opening the exhaust valve of the engine at a point near the bottom dead center in the suction stroke. The area of the nozzle of the turbine of turbo-charger is controllable by a rotor-type mechanism (69). A passage formed in the rotary-type mechanism opens to the downstream side of this mechanism. The passage is communicated with the inlet pipe of the engine through a passage (42a).