Cylinder liner with temperature sensor

Patent metadata

Field	Value
Publication number	US-11280291-B2
Application number	US-201916731225-A
Country	US
Kind code	B2
Filing date	Dec 31, 2019
Priority date	Dec 31, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A cylinder liner for an internal combustion engine is formed of cylindrical liner body having an interior cavity with a cylindrical inner surface, a sensor embedded in the cylindrical liner body and being configured for sensing a physical condition on the cylindrical inner surface, and a transmitter connected to the cylindrical liner body at a position remote from the sensor. A connecting wire connects the transmitter to the sensor, and is embedded in in the cylindrical liner body. The sensor is located in an upper portion of the cylindrical liner body and the transmitter is located directly below the sensor, such that the wire runs vertically. The transmitter can send information obtained by the sensor to a remote processor for calculating various operating states of the liner.

First claim

What is claimed is:

1. A cylinder liner for an internal combustion engine comprising:
a cylindrical liner body having an interior cavity with a cylindrical inner surface;
a sensor located in or on the cylindrical liner body and being configured for sensing a physical condition of the liner;
a transmitter disposed on the cylindrical liner body at a position remote from the sensor; and
a connecting wire connecting the transmitter to the sensor, the connecting wire being embedded in in the cylindrical liner body.

2. The cylinder liner according to claim 1 , wherein the sensor is located in an upper portion of the cylindrical liner body and the transmitter is located directly below the sensor, such that the wire runs vertically.

3. The cylinder liner according to claim 1 , wherein the sensor is a temperature sensor and is embedded in the liner body.

4. The cylinder liner according to claim 3 , wherein the temperature sensor is a thermocouple.

5. The cylinder liner according to claim 1 , wherein the transmitter is a Wifi or BLUETOOTH® transmitter.

6. The cylinder liner according to claim 1 , wherein the sensor is a strain sensor.

7. The cylinder liner according to claim 6 , wherein the strain sensor is printed on an outer surface of the liner body.

8. The cylinder liner according to claim 1 , wherein the sensor and wire are positioned in a channel formed in the liner body.

9. A method for manufacturing a cylinder liner for an internal combustion engine, comprising:
forming a cylindrical liner body having an internal cavity with a cylindrical inner surface;
machining a channel in the cylindrical liner body,
placing a sensor in one end of the channel and a wire connected to the sensor through a longitudinal extent of the channel to another end of the channel;
connecting the wire to a wireless transmitter; and
connecting the transmitter to the cylindrical liner body.

10. The method according to claim 9 , wherein the step of machining a channel includes cutting a groove in the liner body from an outside diameter of the liner body, and then filling the groove with thermal spray of iron powder after placement of the sensor and wire.

11. The method according to claim 9 , wherein the channel runs vertically, parallel to a cylindrical axis of the cylinder liner.

12. The method according to claim 9 , wherein the channel is cut using electrical discharge machining.

13. A method for manufacturing a cylinder liner for an internal combustion engine, comprising:
forming a cylindrical liner body having an internal cavity with a cylindrical interior surface;
printing a sensor on an exterior surface of the liner body;
machining a groove in an exterior surface of the cylindrical liner body,
placing a wire connected to the sensor through a longitudinal extent of the groove to another end of the channel;
connecting the wire to a wireless transmitter;
connecting the transmitter to the cylindrical liner body; and
filling the groove.

Assignees

• Mahle Int Gmbh

Inventors

• Chen Yu
• Wilkinson Russ
• Kent Dave

Classifications

• G01L1/2206

  Special supports with preselected places to mount the resistance strain gauges; Mounting of supports · CPC title

• G01K2205/00

  Application of thermometers in motors, e.g. of a vehicle · CPC title

• F02D35/025 Primary

  by determining temperatures inside the cylinder, e.g. combustion temperatures · CPC title

• F02D2200/021

  Engine temperature · CPC title

• F02D41/22

  Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} · CPC title