Knock detecting device
First Claim
1. A knock detecting device for a multiple cylinder engine, comprising:
- a sensor for detecting vibrations of the body of the engine and producing output signals indicative thereof;
a plurality of averaging circuits, each of said averaging circuits corresponding to a separate one of said cylinders;
a first switch means for distributing output signals from said sensor developed in association with individual cylinders to said corresponding averaging circuits in synchronism with ignitions of said individual cylinders;
a second switch means for selecting output signals from said corresponding averaging circuits in synchronism with said ignitions thereby providing individual corresponding reference signals for each of said cylinders; and
a detecting means for detecting a knocking state of each of said cylinders in dependence on said corresponding reference signal for each cylinder.
0 Assignments
0 Petitions
Accused Products
Abstract
A knock detecting device for modifying the ignition timing of individual cylinders of an engine, by using averaging circuits which are the same in number as the cylinders, a first distributing switch that distributes the output from a sensor detecting engine vibration to said averaging circuits, a second distributing switch selecting the outputs from the averaging circuits, a detecting means detecting the presence of knocking at each cylinder through comparison of the output from the sensor and the selected output from the averaging circuits, and a control means controlling the ignition timing of the individual cylinders in response to the output from the detecting means.
-
Citations
7 Claims
-
1. A knock detecting device for a multiple cylinder engine, comprising:
-
a sensor for detecting vibrations of the body of the engine and producing output signals indicative thereof; a plurality of averaging circuits, each of said averaging circuits corresponding to a separate one of said cylinders; a first switch means for distributing output signals from said sensor developed in association with individual cylinders to said corresponding averaging circuits in synchronism with ignitions of said individual cylinders; a second switch means for selecting output signals from said corresponding averaging circuits in synchronism with said ignitions thereby providing individual corresponding reference signals for each of said cylinders; and a detecting means for detecting a knocking state of each of said cylinders in dependence on said corresponding reference signal for each cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification