Engine exhaust heat temperature detection device

摘要

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.

主权项

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.