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System for detecting engine ignition failures in an internal combustion engine

  • US 4,995,365 A
  • Filed: 12/19/1989
  • Issued: 02/26/1991
  • Est. Priority Date: 02/07/1989
  • Status: Expired due to Fees
First Claim
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1. Apparatus for detecting ignition failures in an internal combustion engine having a plurality of cylinders for internal combustion, exhaust valves for each of said cylinders and an exhaust manifold having a collecting tube and connections thereof to each of said exhaust valves, said apparatus comprising:

  • a pressure gradient sensor means (10), exposed to pressure prevailing inside said exhaust manifold and to pressure gradients passing downstream of said exhaust valves, for sensing pressure shock waves generated by opening of said exhaust valves without regard to slower fluctuations of pressure in said manifold; and

    an evaluation stage (12) electrically connected to said pressure gradient sensor means and having means for detecting and reporting a pressure wave deficiency relating to the opening of any of said exhaust valves.

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