Abstract: A subchamber type combustion chamber for a diesel engine, which reduces fuel consumption rate and combustion noise. To achieve the object, a subchamber type combustion chamber is communicated with a main combustion chamber through a nozzle hole, a fuel injection nozzle faces into the subchamber, and a glow plug extends into the subchamber. A heat generating portion of the glow plug includes a rod-shaped portion and a projecting portion projecting from an end of the rod-shaped portion. The projecting portion is provided with a convex curved surface projecting from a circular peripheral edge at the end of the rod-shaped portion while the convex curved surface is reduced in diameter. The percentage of value P/D obtained by dividing projection dimension P of the projecting portion from the end of the rod-shaped portion by diameter dimension D at the end of the rod-shaped portion is 3% to 23%.

Abstract: An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (3), a first ring groove (4), a second land (5), a second ring groove (6), a third land (7), a third ring groove (8), and a piston skirt (9) formed on a piston peripheral wall (1) in the above-recited order from a side of a piston head (2). A first pressure ring (10) is fitted in the first ring groove (4). A second pressure ring (11) is fitted in the second ring groove (6), an oil ring (12) fitted in the third ring groove (8), and an indentation (13) is formed at the second land (5).

Abstract: A subchamber type combustion chamber for a diesel engine, which reduces fuel consumption rate and combustion noise. To achieve the object, a subchamber type combustion chamber is communicated with a main combustion chamber through a nozzle hole, a fuel injection nozzle faces into the subchamber, and a glow plug extends into the subchamber. A heat generating portion of the glow plug includes a rod-shaped portion and a projecting portion projecting from an end of the rod-shaped portion. The projecting portion is provided with a convex curved surface projecting from a circular peripheral edge at the end of the rod-shaped portion while the convex curved surface is reduced in diameter. The percentage of value P/D obtained by dividing projection dimension P of the projecting portion from the end of the rod-shaped portion by diameter dimension D at the end of the rod-shaped portion is 3% to 23%.

Abstract: An apparatus for adjusting the fuel amount of a diesel engine is capable of preventing a decrease in the accuracy of the adjustment of the fuel amount. An engine stop operation input portion 12 is installed in the slider 5 and an engine stop operation output portion 13 is opposite to the engine stop operation input portion 12. When an engine stop operation is performed, engine stop operation force 14 is inputted from the engine stop operation output portion 13 to the engine stop operation input portion 12 and the slider 5 slides in the direction of the decrease in the fuel amount with the governor lever 1 remained intact so that the engine is stopped. A virtual line 16 is assumed to pass through a central portion of the biasing spring 9 when seen from a direction parallel to the adjustment amount rack pin 8.

Abstract: An apparatus for adjusting the fuel amount of a diesel engine is capable of preventing a decrease in the accuracy of the adjustment of the fuel amount. An engine stop operation input portion 12 is installed in the slider 5 and an engine stop operation output portion 13 is opposite to the engine stop operation input portion 12. When an engine stop operation is performed, engine stop operation force 14 is inputted from the engine stop operation output portion 13 to the engine stop operation input portion 12 and the slider 5 slides in the direction of the decrease in the fuel amount with the governor lever 1 remained intact so that the engine is stopped. A virtual line 16 is assumed to pass through a central portion of the biasing spring 9 when seen from a direction parallel to the adjustment amount rack pin 8.