The engine (12) has a fuel supply device with fuel pump (34), fuel pressure damper (36) and injection valve (26). The pressure damper has damper membrane (54) that separates the damper chamber (53) and damper back chamber (56) from each other. The damper b...

The cooperative operational relationship among an ignition switch, choke mechanism and air filter unit for a portable power tool are integrated in a way to improve that relationship. The ignition switch and choke mechanism are arranged in a coactive relati...

A combined gasoline and hydrogen fueling system (10',110) for a gasoline-powered internal combustion engine (62), including, preferably, a rapid-start catalytic reformer (72) for producing reformate gas (98) containing hydrogen from gasoline (74). The refo...

An automatic priming system (20) for internal combustion engines (22), which is operable at engine cranking speeds and which is automatically disabled at engine running speeds. The automatic priming system is driven by pressure fluctuations within the engi...

A carburetor for a small internal combustion engine has a manual priming fuel pump with a resilient valve for allowing fuel flow in a first direction and for preventing fuel flow in a second direction. The resilient valve is reinforced with longitudinally ...

A carburetor (10) having a first valve (12) to control the application of pressure pulses to a fuel metering assembly of the carburetor through a first flow path and a second valve (14) which controls at least a second flow path to provide an enriched fuel...