Spark ignition engine using lean air-fuel mixture

Spark-ignition engine for lean air-fuel mixture

Spherical rotary engine valve

Spherical rotary engine valve assembly

Spherical rotary intake valve for spherical rotary valve...

Spherical rotary valve

Spherical rotary valve assembly for an internal combustion engin

Spherical rotary valve assembly for an internal combustion engin

Spherical rotary valve assembly for an internal combustion engin

Spherical rotary valve assembly for use in a rotary valve intern

Spring apparatus and valve train of internal combustion...

Spring damper with controlled wear area

Spring retainer and method for manufacturing the same

Stratified-combustion type internal combustion engine with pre-c

Structure of an exhaust port in an internal combustion engine

Supercharged internal combustion engines

Swing valve for internal combustion engines

System and device for the ignition of an internal combustion eng

System for controlling fluid flow

System for controlling the intake air of an automotive engine