Naoki Hakamada

Measurement of friction in timing chain

Abstract To reduce drive loss in engine valves, we established a technique for precisely measuring sliding loss in timing chains and timing chain guides of engines. The technique allows for the chain loss to be attributed to timing chain guides and other parts. This allowed us to determine the effect of each loss factor.

Development of DL pulley for variable displacement compressor: development of metal breakage type torque limiter

Abstract A new type DL pulley for the continuous variable displacement compressor has been developed. This technology was achieved by special metal and special limiter shape. As a result, it has achieved various superior characteristics, such as accurate limiter torque and light weight, to our current DL pulley. This paper reports the mechanism and characteristic of the new type limiter.