Combustion chamber and diesel engine

The invention discloses a combustion chamber and a diesel engine. The combustion chamber comprises a combustion chamber pit formed in the top end of a piston. The side wall of the combustion chamber pit is provided with a throat extending in a spiral shape, the spiral direction of the throat is consistent with the direction of the air inlet vortex, and the air inlet vortex is spiral air flow conveyed into the combustion chamber through the air inlet channel. According to the combustion chamber provided by the invention, the air flow input into the combustion chamber through the air inlet channel is in the vortex shape, so that the vortex in the combustion chamber blows oil gas to enable the oil gas to integrally deviate in the vortex direction. Due to the fact that the throat extends in the spiral shape, and the spiral direction is consistent with the direction of the air inlet vortex, the height of the throat can be correspondingly changed along with the air inlet vortex, the position of the throat can reach