Abstract: A system and a method for detecting an engine revolution speed, identifying engine cylinders, and controlling an engine operation according to the detected engine revolution speed and identified engine cylinders in which a crank angle sensor includes a rotor plate which rotates in synchronization with a rotation of an engine crankshaft, a plurality of first slits whose number corresponds to the number of cylinders and which are mutually arranged at equal intervals along the circumferential direction of the rotor plate, and second slit, both first and second slits being aligned on the same circumferential direction, the sensor outputting a pulse train signal including a first signal corresponding to a first crank angle position before a top dead center in a compression stroke and a second signal corresponding to a second crank angle position after the top dead center in the compression stroke of a first engine cylinder and a microcomputer executes a fuel injection quantity and/or ignition timing control on the

Abstract: A clamp for ignition cables has a band-like clamp holder tightly wound around the body portion of a rubber ignition plug cap enclosing the end portion of an ignition cable and has inserting and fixing portions provided on the outer circumference thereof, and has clamp pieces each having an inserting and fixing leg piece designed to be inserted so as to be releasably fixed in the respective inserting and fixing portions in a locking manner and has cord holding portions with a cord inserting port provided at the upper portion thereof. These clamp holder and clamp pieces are formed from a non-rubber rigid material. The clamp pieces are inserted into the clamp holder tightly engaged around the body portion of the ignition plug cap so as to be fixed and locked therein in an erect fashion. Ignition cables are then inserted into the cord holding portions and fixedly held therein.

Abstract: To facilitate mounting the ignition plug socket into a socket mounting hole formed in an engine body and additionally to prevent vibration of the mounted plug socket, a plurality of projections such as axially extending straight ribs or circumferentially extending annular ribs are formed on the outer circumferential surfaces of the plug socket body of the ignition plug socket.

Abstract: To arrange and clamp plural high tension cords accurately and orderly in parallel to each other within a narrow space on an engine cover for prevention of the cords from vibration, a high tension cord clamp member is selectively and removably attached to a plug socket body, according to the number and the arrangement position of the high tension cords. That is, some cord clamp members formed with different cord holding portions and different cord holding cutouts portions are previously prepared and selectively mounted on ignition plug sockets according to engine model. Therefore, the high tension cord arrangement work productivity can be improved, because high tension cords can be previously assembled, before the plug sockets are connected to the ignition plugs, by use of the cord clamp members removably attached to the plug sockets.

Abstract: An automotive vehicle is equipped with an exhaust gas recirculation system in which a part of exhaust gas is recirculated back to the combustion chambers of the engine. The exhaust gas recirculation system is comprised of an EGR passage through which the exhaust gas flows. An EGR valve is disposed in the EGR passage to control the amount of the recirculated exhaust gas. A temperature sensor is disposed in the EGR passage upstream of the EGR valve to detect the temperature of the recirculated exhaust gas flowing through the EGR passage and output a signal representing the exhaust gas temperature. The signal is input to a control unit which is arranged to cause a warning lamp to light when the exhaust gas temperature detected by the temperature sensor is below a predetermined level, thus achieving diagnosis of abnormality in the exhaust gas recirculation system such as clogging of the EGR passage and failed operation of the EGR valve while preventing thermal damage of the temperature sensor.