Since TPR, TEIKOKU PISTON RINGS (TP) establishment in 1939, having set the corporate philosophy of "We shall try to achieve the unlimited potential of technology by developing and improving superior powertrain machinery, and contribute to realizing a clean environment and a sophisticated global society by offering unmatched technologies and products with superior value", TPR has been supplying powertrain parts such as piston ring, cylinder liner, sintered products etc. and we have been highly appreciated by customers throughout the world.
Piston rings for gasoline engines
As fuel efficiency improves, reduced weight and a decrease in mechanical loss for engines have become important issues to be solved. In order to reduce friction loss around pistons that accounts roughly for 40-50% of friction loss in the entire engine, narrower-width piston rings that are compatible with smaller pistons and the use of low-tension piston rings are becoming widespread.
As exhaust restrictions, high output, power, longer durability, and fuel efficiency are being demanded of diesel engines recently, anti-abrasion, reduced oil consumption, and high rigidity are required of piston rings.
This is a superior piston ring for oscillation with aluminum alloys.
With the recent demands for fuel efficiency, higher performance, and lighter weight engines, there is a growing trend for improving cooling performance, reducing clearance between cylinders, and using aluminum engine blocks. Consequently, TPR is striving to improve adherence to the aluminum block by applying centrifugal casting method to make liners thinner, and thereby achieve lower costs.