The support part and support material directly determine the vibration performance of Bare Engine, which are generally supported on the frame through the support on the body and the flywheel housing or the gearbox housing.

The support methods of Bare Engine generally include three-point support and four-point support. In modern times, some Cummins Engine brackets use hydraulic bushings, which can greatly reduce the impact of Cummins Engine vibration on the body.

The main function of the piston connecting rod group is to bear the pressure of the combustion gas, transmit this force to the connecting rod through the piston pin, and then to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft. It is generally divided into a piston group and a connecting rod group.

The main function of the piston is to withstand the pressure of the combustion gas and transmit this force to the connecting rod through the piston pin to promote the rotation of the crankshaft.

In addition, the top of the piston and the cylinder head and the cylinder wall together form a combustion chamber. The piston is the part with severe working conditions in Bare Engine due to the gas force and reciprocating inertia force of the piston.

The top of the piston is in direct contact with the high-temperature gas, which makes the temperature of the top of the piston very high. The piston slides at high speed along the cylinder wall under the action of lateral pressure. Due to poor lubrication conditions, the friction loss is large and the wear is serious. Bare Engine widely use aluminum alloy pistons, whether they are gasoline Bare Engine or diesel Bare Engine, and only a few Bare Engine use cast iron or heat-resistant steel pistons.