Ceramic Valves Engine

The evaluation was undertaken in three phases.

Ceramic valves engine.

This reduces the friction particularly in engines where oil flow is restricted to the head. Advertisement exhaust valves may be made from a martensitic steel with chrome and silicon alloys or a two piece valve with a stainless steel head and martensitic steel stem. C lube dry film ceramic lubricant combines the durability of a ceramic resin with the lubricity of a ceramic lubricant. We do this by the application of a dry film lubricant.

Ceramics are used in engine applications where there isn t any impact or tension loading ceramic ball bearings turbos are a good example as well as valves cams etc. The coating is also designed to aid in the more even transfer of heat reducing hot spots. Two candidate ceramic materials were chosen. Intake manifolds intakes are coated on the bottom with the oil shedding coating to cut thermal transfer from the oil to the intake charge.

Valves the valve faces are coated with the same barrier as the piston tops and combustion chambers. This study evaluates how the higher engine speeds and lower valve spring loads that they permit contribute to higher engine output and greater fuel economy. Here is an article on the prospects for an adiabatic turbo diesel from 1987 adiabatic diesel engine technology in future transportation. Valve stems are treated with a ceramic dry film lubricant.

For many late model engines and performance engines the intake valves are made of an alloy called silchrome 1 sil 1 that contains 8 5 percent chromium. Interest in and experimentation with ceramics in the internal combustion engine ice goes way back. Intake valves usually do not suffer as severely as exhaust valves which see combustion chamber temperatures. Therefore the primary concern is lubricating the valve stem and seat.

C lube is a thermally cured dry film lubricant designed to provide high pressure lubrication to surfaces subject to sliding rotating or oscillating motion such as piston skirts and gears. It also evaluates their reliability in the presence of valve bounce and other adverse conditions that ceramic valves normally fail to withstand. Valves allow for higher engine speeds and will accommodate highly aggressive camshaft profiles. Yttria partially stabilized zirconia psz and sintered silicon nitride si 3 n 4.

The lighter weight contributes to minimized wear on rocker arms and improved valve. Ceramic and ceramic head valves have been demonstrated for use as exhaust valves at only 40 percent the mass of steel valves but the brittle failure mode of ceramic versions can have devastating consequences on the engine. An evaluation of engine valves made of solid ceramic materials for use in an uncooled di diesel engine was conducted.