Abstract: A diesel engine including: a cam shaft driven by a crankshaft, a fuel injection pump driving cam provided on the cam shaft and configured to drive a fuel injection pump, and an intake cam provided on the cam shaft and configured to drive an intake valve. The fuel injection pump driving cam has a maximum radius portion, a minimum radius portion, an intermediate portion having a radius smaller than that of the maximum radius portion and larger than that of the minimum radius portion, and a slant portion where the intermediate portion shifts to the minimum radius portion in a reverse rotation direction of the driving cam. The position where the intermediate portion shifts to the slant portion begins after the intake valve is opened to an extent corresponding to at least half of a maximum lift of the intake valve.

Abstract: A diesel engine including: a cam shaft (13) driven by a crankshaft, a fuel injection pump driving cam (14) provided on the cam shaft and configured to drive a fuel injection pump, and an intake cam (22) provided on the cam shaft and configured to drive an intake valve (31). The fuel injection pump driving cam (14) has a maximum radius portion (53), a minimum radius portion (51), an intermediate portion (55) having a radius smaller than that of the maximum radius portion and larger than that of the minimum radius portion, and a slant portion (56) where the intermediate portion shifts to the minimum radius portion in a reverse rotation direction of the driving cam. The position where the intermediate portion shifts to the slant portion begins after the intake valve is opened to an extent corresponding to at least half of a maximum lift of the intake valve.

Abstract: An engine device with high reliability and high safety even in use in cold regions, especially in arctic regions at ?20° C. or less, the engine device including: a heating portion (21, 22, 23, 24, 25, 26) configured to increase a temperature in a mixed region where an intake air flowing in a blow-by gas mixed joint (20, 20A, 20B, 20C, 20D) and a blow-by gas introduced from a returning hose (12) are mixed; and/or a pressure regulation portion (121, 125) having a blow-by gas passage in which the blow-by gas from a combustion chamber flows.