Device for the simultaneous and quantitative detection of the detonation and preignition

Claim 1

A system for simultaneously and quantitatively determining the detonation and preignition in an internal combustion engine, in response to an ignition signal, including: a single transducer operably connected to said engine for producing signals in accordance with the variations in pressure within said engine; peak pressure circuit means operably connected to said transducer and responsive thereto for producing a detonation gating signal of predetermined duration when the pressure in said engine attains a maximum value; detonation gating circuit means operably connected to said transducer and to said peak pressure circuit meanS for enabling transmission of the transducer signals upon occurrence of said detonation gating signal; pulse generator means for producing a train of pulses having a frequency proportional to the speed of said engine; gate generator circuit means operably connected to said peak pressure circuit means and responsive to said ignition signal and to said detonation gatinG signal for producing a preignition gating signal having a duration defined by said ignition signal and said detonation gating signal; preignition gating circuit means operably connected to said pulse generator and to said gate generator circuit for enabling transmission of said train of pulses upon occurrence of said preignition gating signal; and measuring means operably connected to said detonation gating circuit and to said preignition gating circuit and responsive to the transmitted transducer signals and to the transmitted train of pulses for evaluating same.

Claim 2

A system for simultaneously and quantitatively determining the detonation and preignition in an internal combustion engine, in response to an ignition signal, including: a single transducer operably connected to said engine for producing signals in accordance with the variations in pressure within said engine; peak pressure circuit means operably connected to said transducer and responsive thereto for producing a detonation gating signal of predetermined duration when the pressure in said engine attains a maximum value; detonation gating circuit means operably connected to said transducer and to said peak pressure circuit meanS for enabling transmission of the transducer signals upon occurrence of said detonation gating signal; pulse generator means for producing a train of pulses having a frequency proportional to the speed of said engine; gate generator circuit means operably connected to said peak pressure circuit means and responsive to said ignition signal and to said detonation gatinG signal for producing a preignition gating signal having a duration defined by said ignition signal and said detonation gating signal; preignition gating circuit means operably connected to said pulse generator and to said gate generator circuit for enabling transmission of said train of pulses upon occurrence of said preignition gating signal; and measuring means operably connected to said detonation gating circuit and to said preignition gating circuit and responsive to the transmitted transducer signals and to the transmitted train of pulses for evaluating same.