Valve Train for American Diesel & HD Gas
The trusted Valve Train for Cummins, Caterpillar, Detroit, Mack, CaseIH, John Deere diesel and heavy duty gas engines
Today’s valve train is a composite marriage of highly engineered components. By design, engine valves and seats are at the nerve centre of the combustion process. To withstand extreme thermal and mechanical strain, dissipate intense heat, maintain alignment and integrity while performing millions of reciprocal cycles* is a tough metallurgical ask. Likewise, valve guides, valve stem seals, springs, rotocoils, collets and injector tubes have demanding roles and must perform.
The name Empower brings with it the acme of technology and endurance in every component part for cylinder head building.
Introduction of the compression ignition engine in 1897 by German engineer Rudolph Diesel has seen a succession of improvements. Its simple design, fuel efficiency, performance and reliability make it a popular choice for industry, transportation and passenger vehicles.
Originally, diesels were dirty, smelly, noisy engines. Now with more than 50% of Europe’s passenger vehicle population diesel powered, the resultant transformation is an extremely efficient, relatively quiet and low emission engine. Today’s electronic unit/common rail injection and a vision towards HCCI technology gives a positive outlook for this legendary power plant.
Global tightening of emission control laws regulated by the EPA and EC, (incl CARB) has placed demands on engine and component makers to meet the necessary requirements. Many initiatives have been undertaken to lower NOx and PM in conformity to each US Tier/Euro standard. One example is increased compression ratios and combustion temperatures.
Best materials and design
Metal composition is critical and application specific. Engine valves are manufactured from selected materials such as martensitic or austenitic steels. Different applications utilize special alloys known as silchrome, pyromet, inconel and tribaloy. In certain duties valves incorporate hardened heads or satellite-faced seats and tips. Others combine two or three different metals in the one valve, or nickel base super allows including cobalt. Virtually all late model engines, including high horsepower after-cooled engines with pressure-boosted induction, require positive valve stem seals to assist in maintaining emission levels. An electro-deposition of chrome applied to the valve stem increases resistance to wear.
Empower valve guides are produced from premium grade cast iron and contain an internal spiral groove (some with a double spiral) to provide maximum oil retention and fight wear. Many late model applications use a special heat treated and/or phosphate coated bore to endure the environment encountered with today’s low ash oils & ultra-low sulfur fuels. Materials which meet or exceed OEM specifications are used in Empower heavy-duty valve seat inserts.
The engine builder’s hallmark
Cylinder head building must be right first time, every time. Whatever the challenge, Empower is at the call of the application. Empower – the signature of eminence for proficient installations.
Glossary of Terms
CARB – California (Air Resources Board)
EC – European Commission
EPA – Environment Protection Authority
HCCI – Homogeneous Charge Compression Ignition
NOx – Oxides of Nitrogen
PM – Particulate matter
*Valves open and close 17 times/sec for typical 4-stroke engine at 2000 RPM.