Patent ID: 7162987

Claim:
An engine and engine warming apparatus comprising: a warm fluid circulation loop; a fluid heater operative to heat warm fluid in the warm fluid circulation loop; a first fluid to fluid heat exchanger mounted to a first vehicle and releasably connectable to the warm fluid circulation loop and operably connected to a first engine fluid circulation loop which is operatively connected to a first engine fluid system in a first vehicle engine in the first vehicle, and a first engine fluid pump operative to pump engine fluid through the first engine fluid circulation loop and the first engine fluid system and the first fluid to fluid heat exchanger; a second fluid to fluid heat exchanger mounted to a second vehicle and releasably connectable to the warm fluid circulation loop and operably connected to a second engine fluid circulation loop which is operatively connected to a second engine fluid system in a second vehicle engine in the second vehicle, and a second engine fluid pump operative to pump engine fluid though the second engine fluid circulation loop and the second engine fluid system and the second fluid to fluid heat exchanger; at least one warm fluid pump operative to pump warm fluid through the warm fluid circulation loop and the fluid to fluid heat exchangers; and wherein the fluid to fluid heat exchangers are operative to transfer heat from warm fluid in the warm fluid circulation loop to engine fluid in the engine fluid circulation loops.