公开(公告)号：US11614354B2

公开(公告)日：2023-03-28

申请号：US16328420

申请日：2019-02-13

Applicant: Renk America LLC

Inventor： David Carl Swenson ,  Timothy Ryan Klein ,  John Wesley Clark ,  Michael Jay Strait

IPC: G01F23/04 ,  F01M11/12 ,  G01F23/263

Abstract: A system, as an engine with a crankcase containing oil or a fluid mixed with oil, has a reservoir containing liquid that extends up to a level of the fluid. A dipstick support structure supports a dipstick on it so that the dipstick extends into the fluid past the level of the fluid, and so that the dipstick is manually removable from the dipstick support structure by a user. An electrical system is connected with the dipstick, and the electrical system electrically senses the level of the fluid based on an electrical characteristic of the dipstick that varies with the varying level of the fluid when the dipstick extends into it. The electrical characteristic may be capacitance of the dipstick detected by sequential charging and discharging of the dipstick to produce a square wave electrical signal the frequency of which corresponds to the level of fluid.