Farm Power & Machinery

Suction /Induction stroke

 
• During suction stroke (Fig. 3.1), only air or mixture of air and fuel are drawn inside the cylinder. The charge enters the engine through the inlet valve which remains open during admission of the charge. The exhaust valve remains closed during this stroke. The pressure in the engine cylinder is less than atmospheric pressure during this stroke due to which the charge is sucked in to the engine cylinder.
  

Fig. 3.1 Suction stroke