×

Overheat preventing system for exhaust gas purifier of vehicles

  • US 4,128,998 A
  • Filed: 02/02/1977
  • Issued: 12/12/1978
  • Est. Priority Date: 06/26/1972
  • Status: Expired due to Term
First Claim
Patent Images

1. An overheat preventing system for exhaust gas purifier of a vehicle comprising:

  • a temperature detector inserted in the locality of each of a plurality of engine exhaust ports;

    an overheat detector means for detecting failure of an engine to fire from signals from said temperature detectors to produce a signal, said overheat detector means detecting the time rate of change of the temperature in the locality of said engine exhaust ports, whereby when said temperature change rate reaches a predetermined value, the occurrence of a misfire is detected to generate an overheat signal; and

    means responsive to said signal generated from said overheat detector means to pevent unburned gases from flowing into an exhaust gas purifier.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×