公开(公告)号：US20170299467A1

公开(公告)日：2017-10-19

申请号：US15515644

申请日：2015-10-07

Applicant: Scania CV AB

Inventor： Björn JOHANSSON ,  Sebastian ZAMANI ,  Peter WANSÖLIN

IPC: G01M15/06 ,  F02B77/08 ,  F02D41/00 ,  G01P3/481

CPC classification number: G01M15/06 ,  F02B77/085 ,  F02D35/028 ,  F02D41/009 ,  F02P7/067 ,  G01D5/145 ,  G01D5/24461 ,  G01P3/481 ,  G01P3/487 ,  G01P3/488

Abstract: A device for detecting and monitoring crank shaft rotary speed and position in a four stroke engine, wherein a first and a second sensor are arranged to sense passage of reference marks on a rotatable element or elements. The first sensor is a high precision sensor which is arranged to sense passage of reference marks on a crank shaft flywheel of the engine, and the second sensor is a low speed sensor which is arranged to sense passage of reference marks on the crank shaft flywheel or reference marks or a wheel being associated with a cam shaft of the engine. The invention also concerns a method and a vehicle.