Changes

These engines have some similarities to diesel engines but they are not true compression ignition engines because they have a lower compression ratio and use an auxiliary source of heat to ignite the fuel.

These engines have some similarities to diesel engines but they are not true compression ignition engines because they have a lower compression ratio and use an auxiliary source of heat to ignite the fuel.

===Brayton's engine===

===Brayton's engine===

George Brayton, of [[Boston, Massachusetts]] was a builder of gas engines. In 1890, he patented an engine running on liquid fuel.  It used a fuel injection system similar to that used in Diesel engines.<ref> https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=432114A&KC=A&FT=D&ND=3&date=18900715&DB=&locale=en_EP#</ref>

George Brayton, of [[Boston, Massachusetts]] was a builder of gas engines. He later built engines capable of running on liquid fuel using a fuel injection system similar to that used in Diesel engines. He obtained a patent in 1890.<ref>https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=432114A&KC=A&FT=D&ND=3&date=18900715&DB=&locale=en_EP# Brayton's 1890 patent]</ref>

===Hot bulb engine===

===Hot bulb engine===