Abstract: To provide an engine capable of more quickly decreasing an auxiliary chamber gas pressure and ensuring a favorable load responsiveness. A gas engine is an engine including, as combustion chambers of each cylinder, an auxiliary chamber that ignites fuel gas to generate flame and a main chamber that combusts the mixture of fuel gas and air using the flame generated in the auxiliary chamber, and includes an auxiliary chamber main pipe that supplies the fuel gas to the auxiliary chamber, an air supply passage in which the air to be supplied to the main chamber flows, and a connection pipe communicating from the auxiliary chamber main pipe to the air supply passage.

Abstract: An engine device, which employs various types of fuels, plural fuel pipes can compactly be disposed without being thermally affected by exhaust gas. In the engine device, a gas fuel pipe that supplies gas fuel to a gas injector, a fuel oil pipe that supplies liquid fuel to a main fuel injection valve are disposed to be divided on both sides of a row of head covers arranged in a line. In addition, in the engine device, an intake manifold that supplies air taken in by a main combustion chamber toward an intake valve extends in parallel to the row of head covers in a cylinder block, and the fuel gas pipe and the intake manifold are arranged on the same side of the row of head covers.

Abstract: An engine device, which employs various types of fuels, plural fuel pipes can compactly be disposed without being thermally affected by exhaust gas. In the engine device, a gas fuel pipe that supplies gas fuel to a gas injector, a fuel oil pipe that supplies liquid fuel to a main fuel injection valve are disposed to be divided on both sides of a row of head covers arranged in a line. In addition, in the engine device, an intake manifold that supplies air taken in by a main combustion chamber toward an intake valve extends in parallel to the row of head covers in a cylinder block, and the fuel gas pipe and the intake manifold are arranged on the same side of the row of head covers.