The core technologies for the transition to the era of electric vehicles include the use of hybrid powertrains and the use of low-viscosity oils to reduce losses in the engine. The two technical means also have an impact on the requirements of the radial and thrust bearings of the engine. Today, as a solution for thrust bearings, Rheinmetall Automotive's Colbenschmidt Sliding Bearing Co., Ltd. introduces a new polymer-coated thrust washer KS R 535L1 to customers. And excellent mixed friction stability.
One possibility for internal combustion engines to reduce energy consumption and emissions is to improve engine internal efficiency by using low viscosity engine oils. On the one hand, the viscosity of engine oils currently used in advanced engines is 0W30 and 0W20. On the other hand, the R & D and preliminary R & D departments have tested the use of oils with significantly lower viscosity grades. However, the result is that the internal plain bearings of the engine The mixed friction part increased excessively. The KS R535L1 thrust washer, especially the polymer coating, compensates for the above-mentioned weaknesses in mixed friction.
As a transition technology on the road to electric vehicles, in the next few years, the market share of vehicles that adopt some electric drive and hybrid methods will increase significantly. Depending on the region, vehicle class, and customer requirements, micro-hybrid, mild hybrid, full hybrid, or plug-in hybrid powertrain systems are used. Different hybrid power levels are achieved through a modular system, similar to vehicle platforms. The main change here is that the auxiliary unit, such as a mild hybrid system, in most cases is a motor driven by a belt drive to start the motor exchange. The original basic engine and crankshaft thrust bearings have the same installation space, so engine manufacturers need a correspondingly interchangeable thrust bearing solution that matches their respective start and stop loads. Normally, the crankshaft thrust bearing is implemented as a loose thrust washer and is made of steel aluminum tin composite material. Colburn Schmidt Sliding Bearing Co., Ltd. has provided thrust bearing solutions that have been proven millions of times by introducing KS R21 products.
In order to meet the increasing start-stop load requirements of micro- and moderate-hybrid engines, Colburn Schmidt Sliding Bearing Co., Ltd. introduced the KS R535 thrust washer to the market four years ago, using silicon-containing steel-aluminum composite .
Polymer coating with high solid lubricant content
The new thrust washer KS R 535L1 with polymer coating was introduced at this year's Frankfurt International Auto Show in Germany. It also uses the above-mentioned composite material with strong wear resistance, but an additional polymer is added after the part is processed. coating. The L1 coating is composed of a polyamide-imide-solid lubricant composite material, which is applied by pressure transmission. Only the sliding working surface is coated with a high solid lubricant content and dyed gray-black composite material.
Reduces wear and maintains mixed friction stability
Compared with the standard thrust washer made of steel-aluminum composite material, the KS R535L1 product shows a significant reduction in wear during the start-stop test as the start-stop cycle increases. In addition, the mixed friction test on the thrust washer test bench shows that the L1 polymer coating has improved self-lubricating properties, high solid lubricant content reduces friction, smoothes the torque change process, and finally achieves significant Longer self-lubricating life.
In various hybrid powertrain engine tests, including 48V belt drive starter generator system (RSG), integrated starter generator system (ISG) and the use of a variety of low viscosity engine oils, the KS R535L1 thrust washer also Exhibits strong abrasion resistance as well as firmness.
The selected polymer coating process ensures a high degree of styling space in the thrust washer design. Therefore, KS R535L1 products can be selectively supplied to customers as loose thrust washers or as installed thrust plain bearings. . To this end, Colburn Schmidt Sliding Bearing Co., Ltd. provides customers with the most advanced thrust bearing solutions for all hybrid classes, which can be applied to meet the different installation space and design of the characteristics of each hybrid class engine Layout requirements.