Engine exhaust heat temperature detection device

Patent metadata

Field	Value
Publication number	US-9404814-B2
Application number	US-201213421047-A
Country	US
Kind code	B2
Filing date	Mar 15, 2012
Priority date	May 31, 2011
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

An exhaust gas temperature detection sensor is arranged at a predetermined position outside a muffler, or at a predetermined position outside an exhaust pipe constituting an exhaust gas flow passage on a more downstream side than the muffler in an exhaust direction. The sensor detects that an atmosphere temperature at the predetermined position outside the muffler has reached a predetermined temperature based on an increase in a temperature inside the muffler, or detects that an atmosphere temperature at the predetermined position outside the exhaust pipe has reached a predetermined temperature based on an increase in a temperature of an exhaust gas inside the exhaust pipe.

First claim

What is claimed is:

1. An engine exhaust heat temperature detection device comprising:
an exhaust gas temperature detection sensor arranged at a position so as not to be directly exposed to exhaust gas;
said position being outside of an exhaust pipe peripheral wall on a far side of a curvature center, and outside a muffler provided in an exhaust gas flow passage of an engine, the muffler having a portion that causes internal moving exhaust gases to impinge at a heat spot, wherein the exhaust gas temperature detection sensor is located outside of the muffler adjacent to the heat spot and adapted to detect that an atmosphere temperature at the position outside the muffler has reached a predetermined temperature indicative of an increase in a temperature inside the muffler, or outside an exhaust pipe constituting the exhaust gas flow passage on a more downstream side than the muffler in an exhaust direction, the exhaust pipe having a portion that causes internal moving exhaust gases to impinge at a heat spot, wherein the exhaust gas temperature detection sensor is located outside of the exhaust pipe adjacent to the heat spot and adapted to detect that an atmosphere temperature at the position outside the exhaust pipe has reached a predetermined temperature indicative of an increase in a temperature of an exhaust gas inside the exhaust pipe.

2. The engine exhaust heat temperature detection device according to claim 1 , wherein
the exhaust gas temperature detection sensor is arranged within an air blowing passage that is used for cooling of the engine.

3. The engine exhaust heat temperature detection device according to claim 1 , wherein
the exhaust gas temperature detection sensor detecting that an atmosphere temperature at the position outside the exhaust pipe has reached a predetermined temperature is provided near a bending portion of the exhaust pipe.

4. The engine exhaust heat temperature detection device according to claim 3 , wherein
the exhaust gas temperature detection sensor is mounted on a support frame supporting the exhaust pipe.

5. The engine exhaust heat temperature detection device according to claim 1 further comprising:
a cooling water temperature detection sensor provided separately from the exhaust gas temperature detection sensor, detecting a temperature of cooling water in a radiator,
wherein, the exhaust gas temperature detection sensor and the cooling water temperature detection sensor are connected to a common control circuit, and,
when at least one of the temperatures detected by the two detection sensors reaches the predetermined temperatures that are respectively configured in the detection sensors, a required device is actuated.

6. An engine exhaust heat temperature detection device comprising:
an exhaust gas temperature detection sensor located outside an exhaust gas conveying arrangement conveying the exhaust gas from an engine to an exhaust gas discharge opening and having a portion that causes internal moving exhaust gases to impinge at a heat spot; and outside of an exhaust pipe peripheral wall on a far side of a curvature center, and
said exhaust gas detection sensor being structured and arranged to detect a predetermined temperature of an atmosphere arranged outside of the exhaust gas conveying arrangement adjacent to the heat spot,
wherein, when said atmosphere is heated to the predetermined temperature by the exhaust gas being conveyed within the exhaust gas conveying arrangement, the exhaust gas temperature detection sensor detects the predetermined temperature of the atmosphere.

7. The engine exhaust heat temperature detection device according to claim 6 , wherein the exhaust gas conveying arrangement comprises an exhaust pipe.

8. The engine exhaust heat temperature detection device according to claim 6 , wherein the atmosphere arranged outside of the exhaust gas conveying arrangement is within an air blowing passage that is used for cooling of an engine.

9. The engine exhaust heat temperature detection device according to claim 6 , wherein the exhaust gas conveying arrangement comprises a muffler and the atmosphere is arranged outside the muffler.

10. The engine exhaust heat temperature detection device according to claim 6 , wherein the exhaust gas conveying arrangement comprises an exhaust pipe and a muffler and the atmosphere is arranged outside the exhaust pipe and downstream of the muffler relative to an exhaust gas flow direction.

11. The engine exhaust heat temperature detection device according to claim 6 , wherein the exhaust gas temperature detection sensor is located outside a wall of a section of the exhaust gas conveying arrangement.

12. The engine exhaust heat temperature detection device according to claim 6 , wherein the exhaust gas temperature detection sensor is located outside a wall of a curved section of the exhaust gas conveying arrangement.

13. The engine exhaust heat temperature detection device according to claim 6 , wherein said exhaust gas conveying arrangement comprises a muffler and an exhaust pipe and the exhaust gas temperature detection sensor is located outside a wall of a curved pipe section of the exhaust pipe located downstream of the muffler relative to an exhaust gas flow direction.

14. An engine exhaust heat temperature detection device comprising:
an exhaust gas temperature detection sensor arranged outside of an exhaust pipe peripheral wall on a far side of a curvature center, and outside each of:
an exhaust pipe having a portion that causes internal moving exhaust gases to impinge at an exhaust pipe heat spot; and
a muffler having a portion that causes internal moving exhaust gases to impinge at a muffler heat spot;

said exhaust gas temperature detection sensor being positioned so as to not be directly exposed to exhaust gas in the exhaust pipe and the muffler and adjacent to at least one of the exhaust pipe heat spot and the muffler heat spot,
wherein, when an atmosphere adjacent the exhaust gas temperature detection sensor is heated by the exhaust gas arranged within the exhaust pipe or the muffler, the exhaust gas temperature detection sensor indirectly detects a temperature of the exhaust gas by detecting a temperature of the atmosphere.

15. The engine exhaust heat temperature detection device according to claim 14 , wherein the exhaust pipe is arranged downstream of the muffler relative to an exhaust gas flow direction.

16. The engine exhaust heat temperature detection device according to claim 14 , wherein the temperature of the atmosphere is a predetermined temperature.

17. The engine exhaust heat temperature detection device according to claim 14 , wherein the exhaust gas temperature detection sensor is located outside and spaced from a wall of a section of the exhaust pipe.

18. The engine exhaust heat temperature detection device according to claim 14 , wherein the exhaust gas temperature detection sensor is located outside and spaced from a wall of a curved section of the exhaust pipe.

19. The engine exhaust heat temperature detection device according to claim 14 , wherein the exhaust gas temperature detection sensor is located outside and adjacent a wall of a curved pipe section of the exhaust pipe located downstream of the muffler relative to an exhaust gas flow direction.

20. The engine exhaust heat temperature detection device according to claim 14 , wherein the engine exhaust heat temperature detection device is arranged on a riding mower and wherein both the exhaust gas temperature detection sensor is coupled to

Assignees

• Tada Hiroyuki
• Asahara Masato
• Ueda Yoshihiro
• Aoki Hideki
• Minoura Akira
• Kubota Kk

Inventors

• Tada Hiroyuki
• Asahara Masato
• Ueda Yoshihiro
• Aoki Hideki
• Minoura Akira

Classifications

• G01K2013/024

  Physics · mapped topic

• G01K2205/04

  for measuring exhaust gas temperature · CPC title

• G01K13/02 Primary

  for measuring temperature of moving fluids or granular materials capable of flow · CPC title

• G01K13/024

  of moving gases · CPC title