Powertrain Parts

Piston Rings

Top Ring

Function:

Positioned at the top of the piston, the top ring seals the combustion chamber from the crankcase to prevent gas leaks (“blow by”)
Transfer of heat between piston and cylinder liner
Maintain a lubricating oil film at the cylinder liner wall to prevent abrasive scuffing

Features:

Steel or cast iron material available
Chrome, Nitride, PVD or DLC coating
Suitable for Gasoline and Diesel engines in the automotive, heavy duty and marine sector

Second Ring

Function:

Combined attributes of top and oil ring
Balance out blow by prevention and oil lubrication

Features:

Steel or cast iron material available
Chrome, Nitride, PVD or DLC coating
Suitable for Gasoline and Diesel engines in the automotive, heavy duty and marine sector

Oil Ring

Function:

Scrape off excessive oil of the cylinder wall
Prevent lubricant oil from burning in combustion chamber, thus lowering oil consumption and contributing to lower emissions

Features:

Two piece and three piece oil rings
Narrow design for lower tension and less friction
Suitable for Gasoline and Diesel engines in the automotive, heavy duty and marine sector

Cylinder Liners & Carbon Scraper Rings

Cast-in Liners

Function:

Tribological attributes of liner’s sliding surface are a major factor to lower lubricant oil and fuel consumption, as well as the degree of piston ring wear
Heat transfer between piston (ring), engine block and coolant
Compression gas sealing
A tight bonding with the engine block is essential

Features:

Suitable for aluminum engine blocks
Spiny surface results in excellent adhesion and improved heat conductivity
Minimal deformation enables superior sealing
Thin liner walls contribute to weight reduction

Thin Wall Dry Liner

Function:

Tribological attributes of liner’s sliding surface are a major factor to lower lubricant oil and fuel consumption, as well as the degree of piston ring wear
Heat transfer between piston (ring), engine block and coolant
Compression gas sealing

Features:

Suitable for both, aluminum and cast iron engine blocks
Thin liner walls contribute to weight reduction
Especially suitable for Diesel engines and motor sport applications

Wet Liner

Function:

Tribological attributes of liner’s sliding surface are a major factor to lower lubricant oil and fuel consumption, as well as the degree of piston ring wear
Heat transfer between piston (ring), engine block and coolant
Compression gas sealing

Features:

Outer chrome plating to prevent cavitation
Minimal deformation enables superior sealing
Thin liner walls contribute to weight reduction
For heavy duty Diesel engines

Carbon Scraper Ring

Function:

During the combustion process hard carbon residues form on the top land of the piston
Those residues accumulate and can result in accelerated liner wear, as well as higher oil consumption and higher emission levels
A Carbon Scraper Ring will scrape off the residues with each piston stroke, thus contributing to the longevity of your engine

Features:

Utilizing a material with the same heat expansion as most cylinder liners, functionality is given at all temperature levels
Highest accuracy in circularity and outer diameter allow for an easy assembly and an outstanding performance

Valve Seats & Valve Guides

Valve Seat
Valve Guide

Valve Seat

Function:

Valve seats act as a seal between the exhaust and intake valve and the combustion chamber
Therefore the valve seat‘s quality (i.e. material quality and shape accuracy) has a direct impact on any combustion engine‘s efficiency
While performing its sealing function, a valve seat must endure extreme levels of heat and mechanical force

Features:

TPR‘s unique sintered alloy mixture allows for a perfect balance between machinability, wear resistance and heat transfer capability
Suitable for Gasoline, Diesel and Gas engines in the automotive, heavy duty and marine sector

Valve Guide

Function:

Valve guides stabilize the valve in minimizing vibrations and horizontal movements
Therefore a proper sealing between valve seat and valve and consequently an efficient combustion cycle is enabled

Features:

Highest inner diameter accuracy to ensure smooth valve movement
TPR‘s unique sintered alloy mixture allows for a perfect balance between machinability, wear resistance and heat transfer capability
Suitable for Gasoline, Diesel and Gas engines in the automotive, heavy duty and marine sector

Seal Rings

Turbocharger Seal Rings
Transmission Seal Rings

Turbocharger Seal Rings

Function:

A turbocharger seal ring prevents lubricant oil from exiting and exhaust gas from entering the inside of the turbocharger housing
The seal ring is placed against the static center housing and rotating shaft – the piston ring itself is not moving
Seal rings have to perform in an extreme environment of temperatures of up to 1000°C and rotating speeds of 250,000rpm
Through these functions the rings contribute to reducing blow by and oil consumption

Features:

TPR’s wide range of sintered metal and steel rings are suitable for both, diesel and gasoline engine turbochargers
Excellent heat resistance ensures dimensional stability and constant tangential force during varying temperatures
TPR seal rings are engineered with highest accuracies for an outstanding sealing performance
Superior wear resistance for a reliable performance during the turbocharger’s lifetime

Transmission Seal Rings

Function:

Seal rings are installed on rotating shafts of transmissions to prevent oil and air leakage to the housing part
The Seal rings have to perform in 100an extreme environment of highly varying temperatures between °C and 150C°, as well as constant differences in rotation speeds and load
Varying levels of lubrication result in special requirements to the material

Features:

Our unique mixtures of high performance plastics (PEEK & PPS) guarantee excellent wear resistance and sealing abilities
TPR special “SS-1” joint end gap shape ensure steady sealing performance during high and low temperature levels
Our section shape design minimizes friction and contributes to a lower (transmission) oil consumption
TPR seal rings are suitable for AT and CVT transmissions and are trusted by leading OEs worldwide