Realized activities relate to improving the reliability of the gas interface, the exclusion of thermal cracks in the zone mezhklapannyh jumpers, improving the work of a pair of saddle - the valve, increasing the strength of plates valve timing, alignment and reduce their temperature, exclusion of cases of hanging racks in directing the operation. Fig .. 1. NASA is often quoted as being for or against this. shows the design of cylinder head. To reduce the strain at the bottom of the fire tightening the cap and the courts an internal combustion engine plant Daldiesel to improve working conditions for a pair of saddle-valve side and increased thickness of the upper walls, put ribs decrease the strain Cover the bottom of the fire along with an increase in the hardness of steel saddles 40H10S2M (GOST 5949-75 *) with HRC 30-35 to HRC 45-50 and providing them with more strict alignment relative to the guide valve possible to eliminate the high wear of friction surfaces (saddle - the valve). From the side of the fire at the bottom of the nozzle has a special heat-resistant threaded insert, which in its lower part overlaps the area mezhklapannyh bridges, eliminating the appearance of Fatigue thermal cracks at this location. Forced to marine diesel engines to reduce the maximum temperature of firing the bottom and align it to the temperature field in the cover there are special insert, which direct the cooling water to the center of the lid.
To increase the strength and stiffness, as well as the exclusion of certain cases of breakage of plates valve, reducing the wear facets of their business in the thickness of the peripheral zone was increased from 5.5 to 6.5 mm, which reduced the maximum stress in the plate valve Fig. 1. Liner packing: 1 - cylinder liner, 2 - cylinder block, 3 - cavitation ring, 4 - O-ring Fig. 2. Cylinder head: 1 - heat-resistant paste, 2 - a stiffening plate - cylinder liner, 2 - cylinder block, 3 - cavitation ring, 4 - O-ring from 91.7 to 66.3 MPa, or 1.38 per cent.
In order for the holes on the end plates were within less than Stress and 'do not have a noticeable effect on the strength of the plates, the distance between the holes on the end plates is reduced from 32 to 26 mm. Rolling the rod with the toroidal part plates made it possible to increase the strength of the valves in the at the junction of the rod at the toroidal part, to increase the durability of the rod. Installing the valves of the mount springs (Fig. 71), contributing to the rotation of the valve allowed to equalize the temperature of plates valve reduce the likelihood of freezing in the valve guides.
To increase the strength and stiffness, as well as the exclusion of certain cases of breakage of plates valve, reducing the wear facets of their business in the thickness of the peripheral zone was increased from 5.5 to 6.5 mm, which reduced the maximum stress in the plate valve Fig. 1. Liner packing: 1 - cylinder liner, 2 - cylinder block, 3 - cavitation ring, 4 - O-ring Fig. 2. Cylinder head: 1 - heat-resistant paste, 2 - a stiffening plate - cylinder liner, 2 - cylinder block, 3 - cavitation ring, 4 - O-ring from 91.7 to 66.3 MPa, or 1.38 per cent.
In order for the holes on the end plates were within less than Stress and 'do not have a noticeable effect on the strength of the plates, the distance between the holes on the end plates is reduced from 32 to 26 mm. Rolling the rod with the toroidal part plates made it possible to increase the strength of the valves in the at the junction of the rod at the toroidal part, to increase the durability of the rod. Installing the valves of the mount springs (Fig. 71), contributing to the rotation of the valve allowed to equalize the temperature of plates valve reduce the likelihood of freezing in the valve guides.
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