Abstract:
The invention prevents reverse rotation of a diesel engine which is possible to occur when the engine is started. A camshaft 13 is driven by a crankshaft 5 through power transmission means, and cams 14, 21 and 22 are provided on camshaft 13 so as to drive a fuel injection pump 12, an intake vale and an exhaust valve, respectively. In fuel injection pump cam 14, middle stage portion 53 is radially larger than minimum radius portion 51 and disposed at a predetermined angle R3 on the back side in the rotation direction from maximum radius portion 52.
Abstract:
A reversible four cycle internal combustion engine. A crankshaft is rotatably mounted in a block and a piston is operatively mounted to a crankshaft via a connecting rod. A follower wheel traverses a cam as the cam rotates with the crankshaft, and in doing so, causes a combustion chamber valve to open and close access of an intake port in the block and an exhaust port in the block to a combustion chamber in the block so as to allow the engine to achieve each of a power stroke thereof, a exhaust stroke thereof, a intake stroke thereof, and a compression stroke thereof.
Abstract:
A control system for a reversible internal combustion engine comprising an AC magneto generator to generate an AC output voltage and a signal generator to generate pulse signals of polarity different from each other with a relation between the phases of the AC output and the pulse signals set so that the half waves of the output voltage having the same polarity when the two pulse signals of different polarities are generated whereby the rotational direction of the engine is judged from the polarity of the half wave of the output voltage of the magneto generator when the signal generator generates the pulse signal of either polarity and the engine is ignited at the low speed ignition position after it is confirmed that the rotational direction of the engine is reversed.
Abstract:
A process for controlling a change-over of a rotative direction of a two cycle internal combustion engine used for driving a travelling machine such as a scooter, a snowmobile, a buggy car or the like wherein the rotative direction of the engine is reversed by advancing an ignition position to an over spark advance position just when it is confirmed that reversion allowance conditions are satisfied which are required for reversing the rotative direction of the engine while the travelling machine is driven with safety maintained.
Abstract:
A reverse rotation control apparatus of inexpensive structure for making it possible to reverse rotation of a two-cycle engine for a motor vehicle without need for monitoring constantly engine rotation speed (rpm) while sparing gear box includes a variety of sensors for generating signals corresponding to engine operating states, and an ignition control unit (10A) for generating an ignition signal (P) on the basis of the various signals. The sensors include a rotation sensor (6) for generating a rotation signal (SG) indicating engine rotation number (Re) and a reverse rotation switch (23) for generating a reverse rotation command signal (RW). The ignition control unit (10A) includes a means for arithmetically determining on the basis of engine state a timer period (TM) over which misfire is caused to occur successively upon inputting of the reverse rotation command signal, a means for causing the misfire to occur over the timer period (TM), and a means for outputting only once an overadvanced ignition signal upon termination of the timer period (TM) which corresponds to a time taken for the engine rotation number (Re) to lower to a predetermined rotation number (ReW) due to the misfire events.
Abstract:
A method of changing the direction of rotation of an internal combustion engine, and in particular of a marine engine, in which the camshafts (15) include two cams (16, 17) for each tappet (20) of a controlled member, each of said cams being suitable for use in one direction of rotation, the direction of rotation of the engine being changed by shifting said camshafts in translation, wherein, prior to shifting said camshafts, the tappets are rotated through one-fourth of a turn so as to put the axis of rotation of each tappet cam-follower wheel (10) orthogonal to the direction of camshaft translation. The invention also applies to an engine employing the method.