Changes

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

===George Brayton===

===George Brayton===

George Brayton, of Boston, Massachusetts patented an improved gas engine in 1872, US Patent #125166.<ref> https://www.google.com/patents/US125166?dq=george+brayton+1872</ref>  This engine ran on gas but, in 1874, Brayton patented another engine which was capable of running on naphtha, a liquid fuel, US Patent #151468 A.<ref> https://www.google.com/patents/US151468?dq=george%2Bbrayton%2B1872&hl=en&sa=X&ved=0ahUKEwij3puXxbDSAhVEbRQKHTKoAEoQ6AEIIzAB</ref>  A further patent was obtained 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#</ref>

George Brayton, of [[Boston, Massachusetts]] patented an improved gas engine in 1872, US Patent #125166.<ref> https://www.google.com/patents/US125166?dq=george+brayton+1872</ref>  This engine ran on gas but, in 1874, Brayton patented another engine which was capable of running on naphtha, a liquid fuel, US Patent #151468 A.<ref> https://www.google.com/patents/US151468?dq=george%2Bbrayton%2B1872&hl=en&sa=X&ved=0ahUKEwij3puXxbDSAhVEbRQKHTKoAEoQ6AEIIzAB</ref>  A further patent was obtained 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#</ref>

===Akroyd Stewart===

===Akroyd Stewart===