Keep reading to find out more about how hot bulb engines work.

In this period diesel and hot bulb engines were four stroke.

Hot bulb engines were built by a large number of manufacturers, usually in modest series.

Efficient, simple and robust - hot bulb engines had it all.

Staged combustion dates back to the hot bulb engine of the 1890s.

See the development of the hot bulb engine and indirect injection for historical significance.

The company's products included hot bulb engines, fire pumps, and motorboats.

Historically, outside flame and hot-tube systems were used, see hot bulb engine.

Yet despite those challenges hot bulb engines remained in use through the 1950s, and into the 1960s in certain deep rural areas.

If a hot bulb engine ran out of fuel, it would simply stop and could be immediately restarted with more fuel.

The hot tube engine is a relative of the hot bulb engine with better timing control.

At the start of the 20th century there were several hundreds of European manufacturers of hot bulb engines for marine use.

The crude oil engine is a type of internal combustion engine similar to the hot bulb engine.

Due to their simplicity and economy, hot bulb engines were popular for high-power applications until the diesel engine took their place from the 1920s.

The lack of valves and the doubled-up working cycle also means that a two-stroke hot bulb engine can run equally well in both directions.

The hot bulb engine requires preheating of the hot bulb with a torch for about 15 minutes before starting.

While hot bulb engines were crude they were easy to maintain and could burn a wide variety of low grade fuels - even waste oils.

Like hot bulb engines, crude oil engines were mostly used as stationary engines or in boats.

For a farmer, a fisherman or a saw-mill operator, where ruggedness and reliability were keys to survival, a hot bulb engine had it all.

The high compression and thermal efficiency is what distinguishes the patent granted to Diesel from a hot bulb engine patent.

Most hot bulb engines were produced as one-cylinder low-speed two-stroke crankcase scavenging units.

Recently, this multi-fuel ability has led to an interest in using hot bulb engines in developing nations where they can be run on locally produced biofuel.

Beginning in 1908 hot bulb engines were designed and manufactured, and such engines afterwards dominated the production line of the Pythagoras factory.

When steam was king, and gas and diesel engines were still in their infancy, hot bulb engines were all the rage.

The Bulldog was an inexpensive, simple, and easily maintained vehicle due primarily to its simple power source: a single cylinder, horizontal, two-stroke, hot bulb engine.