In figure 1A, the piston is at the end of the suction stroke about to start compression and in figure IB, the compression stroke has just been completed.
Figure 2 A shows the compressor with the piston and attached HARS retracted at the end of the suction stroke, and figure 2B shows the compressor with the piston and attached HARS fully inserted at the end of the compression stroke.
Liquid chamber--separated from the compressed air by the diaphragms, it fills with process fluid during the suction stroke
and is emptied during the discharge stroke.
This allows air through the venturi causing the suction stroke
to be repeated.
On the other hand, due to the reduction of full cylinder volume, the amount of air intake, in the suction stroke will decrease and lead to incomplete combustion of fuel and as a result CO, HC emission will increase.
Hence due to increase of compression ratio, even though the amount of air available for combustion in the suction stroke decreases, the inbuilt oxygen caused for proper combustion and caused for reduction in pollutants.
The limit switch is actuated by means of a bolt attached to the inlet valve rocker; we effectively have utilized the 8mm travel of the rocker arm for generating the electrical signal for initiating the injection during the suction stroke.
52 deg during suction stroke, for about 2/5 of the suction stroke.
At the end of its suction stroke
, a control rod attached to the diaphragm blocks the outlet on the venturi, diverting air onto the back of the diaphragm creating the discharge stroke.