System and method for estimating and controlling temperature of engine component

Patent metadata

Field	Value
Publication number	US-9279380-B2
Application number	US-201314018671-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Sep 5, 2013
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

An engine system is provided. The engine system includes an ambient air pressure sensor configured to generate a signal indicative of a pressure of ambient air. The engine system also includes an operational parameter sensor configured to generate a signal indicative of one or more operational parameters associated with the engine. The engine system further includes a controller communicably coupled to the ambient air pressure sensor and the operational parameter sensor. The controller is configured to receive the signal indicative of the pressure of ambient air and the signal indicative of the one or more operational parameters associated with the engine. The controller estimates the temperature of at least one of a valve, a piston, a liner, a cylinder head, and a pre-chamber of the engine as a function of the received signals and parameters associated with fuel delivery in a single fuel cycle of the engine.

First claim

What is claimed is:

1. An engine system comprising:
an ambient air pressure sensor configured to generate a signal indicative of a pressure of ambient air;
at least one operational parameter sensor configured to generate at least one signal indicative of one or more operational parameters associated with the engine; and
a controller communicably coupled to the ambient air pressure sensor and the at least one operational parameter sensor, the controller configured to:
receive the signal indicative of the pressure of ambient air;
receive the at least one signal indicative of the one or more operational parameters associated with the engine;
determine one or more parameters associated with fuel delivery; and
estimate a temperature of an exhaust valve as a function of the received signals and determined parameters.

2. The system of claim 1 , wherein the parameters include a fuel rate, a fuel injection timing and a fuel injection schedule.

3. The system of claim 2 , wherein the fuel rate is derived from a load demand associated with the engine.

4. The system of claim 1 , wherein the one or more operational parameters include a speed of the engine and a temperature of an intake manifold of the engine.

5. The system of claim 1 , wherein the controller is further configured to correlate the received signals with a pre-calibrated map for estimating the temperature of the exhaust valve.

6. The system of claim 1 , wherein the controller is further configured to compute the temperature of the exhaust valve as the function of the received signals and the parameters associated with fuel delivery.

7. The system of claim 1 , wherein the controller is further configured to derate the engine when the estimated temperature of the exhaust valve exceeds a predetermined threshold.

8. The system of claim 1 , wherein the controller is further configured to monitor the temperature of the exhaust valve over a predetermined time period for estimating the temperature of the exhaust valve.

9. The system of claim 1 , wherein the system is employed on a machine.

10. A method for determining a temperature of a component of an engine, the method comprising:
receiving a signal indicative of a pressure of ambient air;
receiving at least one signal indicative of one or more operational parameters associated with the engine;
determining one or more parameters associated with fuel delivery; and
estimating the temperature of an exhaust valve as a function of the received signals and determined parameters.

11. The method of claim 10 , wherein the parameters include a fuel rate, a fuel injection timing and a fuel injection schedule.

12. The method of claim 11 further comprising deriving the fuel rate from a load demand associated with the engine.

13. The method of claim 10 , wherein the one or more operational parameters associated with the engine include a speed of the engine and a temperature of an intake manifold of the engine.

14. The method of claim 10 , wherein the estimating step further comprises correlating the received signals with a pre-calibrated map.

15. The method of claim 10 , wherein the estimating step further comprises computing the temperature of the exhaust valve as a function of the received signals and the parameters associated with fuel delivery.

16. The method of claim 10 further comprising derating the engine when the estimated temperature of the exhaust valve exceeds a respective predetermined threshold.

17. The method of claim 10 further comprising monitoring the temperature of the exhaust valve over a time period for the estimation of the temperature of the exhaust valve.

Assignees

• Caterpillar Inc

Inventors

• Hergart Carl A
• Rasmussen Jason J

Classifications

• 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

• F02D41/38 Primary

  of the high pressure type · CPC title

• F02D2200/022

  Estimation of engine temperature · CPC title