TPR

  • Contact us
  • JP
  • CN

Powertrain Parts Piston rings Piston rings that control lubrication oil are an important functional component requiring high precision and durability since they are used in parts moving at great speed. Piston rings

Piston rings for gasoline engines

As fuel efficiency improves, weight saving 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.
In addition to narrower-width and low-tension piston rings, we can offer our new original techniques.

Major combination of piston rings

3 different shapes of rings are usually used as a set;TOP ring, 2ND ring and OIL ring.

Bore size φ80 class

Technology introduction

I, Hydrogen free-ta-C DLC coating

Hydrogen free-ta-C DLC coating

【Features】
【Main Products】
Gasoline engines for automobiles
Alcohol engines for automobiles

Ⅱ, a-C:H DLC coating (For direct sliding with aluminum alloy cylinder)

a-C:H DLC coating (For direct sliding with aluminum alloy cylinder)

【Features】
【Main Products】
Gasoline engines for motorcycles

Ⅲ, Outer Periphery-asymmetric shaped side-rail(a 3-piece type OIL ring)

Outer Periphery-asymmetric shaped side-rail(a 3-piece type OIL ring)

【Features】
【Main Products】
Gasoline engines for automobiles

Ⅳ, Tx-3 Spacer expander for anti-sticking mechanism(a 3-piece type OIL ring)

Tx-3 Spacer expander for anti-sticking mechanism(a 3-piece type OIL ring)

【Features】
【Main Products】
Gasoline engines for automobiles

Piston rings for diesel engines

As exhaust restrictions, high output, power, longer durability, and fuel efficiency are being demanded of diesel engines recently, low oil consumption and anti-abrasion are required of piston rings with holding its endurance reliability.

Major combination of piston rings

3 different shapes of rings are usually used as a set; TOP ring, 2ND ring and OIL ring.
The OIL ring is a 2-piece type to improve durability.

Bore size φ80 class (For passenger use)


Bore size φ100 class (For medium and/or large-sized truck use)

Technology introduction

I, Outer-periphery shape of oil ring for friction reduction

Outer-periphery shape of oil ring for friction reduction

【Features】
【Main Products】
Diesel engines for automobiles

Race car piston rings

This is a special ring used in various categories of motor sports.

【Features】
Unfortunately, details of rings for motor sports cannot be displayed, however, we provide special rings that are optimum for engine characteristics.
【Main Products】
Engines for domestic and overseas motor sports

PAGE TOP