Abstract: This invention describes an improved intake tube for internal combustion vehicles by locally increasing and then decreasing the airflow over the Mass Airflow Sensor (MAS) preventing a lean condition, which over time is catastrophic to the life of the engine. The intake tube has a cross sectional area that decreases in proximity to the MAS, causing the increase in airflow velocity of the intake air.

Abstract: A power generator unit incorporates a generator driven by an engine. The engine has a fuel tank. A fuel petcock is connected through fuel hoses between the fuel tank and the engine. An insulating cover surrounds the generator, the engine and the fuel tank. A control panel is positioned on the insulating cover. A fuel control lever is pivotally mounted on the control panel. The fuel control lever is connected to the fuel petcock through a flexible transmitter to open and close the fuel petcock.

Abstract: A motorcycle engine includes a crankcase, a cam chest, and a separating wall between the crankcase and cam chest. An opening is defined in the wall and communicates between the cam chest and crankcase. A valve assembly, which is preferably a reed valve assembly, covers the opening and permits one-way flow of air from the crankcase into the cam chest in response to pressure differentials caused by reciprocation of the engine's pistons. The air is then forced into the engine's rocker boxes through the engine's pushrod tubes and forces oil in the rocker boxes to return to the crankcase through narrow oil drainback passages.

Abstract: A variable length connecting rod (12) has a first locking mechanism (36) for releasably locking connecting rod parts in a first effective length setting (FIG. 7) for the rod, and a second locking mechanism (38) for releasably locking the connecting rod parts in a second effective length setting to change the compression ratio for an engine cylinder. When a length change is to be made, hydraulic fluid unlocks a locked one of the locking mechanisms, allowing inertial force to effect the length change during an engine cycle. At completion of a length change, the other locking mechanism automatically unlocks.

Abstract: A crank case is divided in the longitudinal direction into a front case and a rear case. The front and rear cases are fastened to each other with bolts. A bolt hole through which the bolt passes has a diameter larger than that of the bolt. The bolt hole forms part of an oil passage. The connection end plane on the front case side has an oil groove extending from the right end side to the left end side of the connection end plane. The oil groove is in communication with a communication port at the right end of the connection end plane, and is in communication with an oil passage formed around a bolt at the left end of the connection end plane. With this construction, it becomes easy to form an oil passage in a crank case which is divided into two parts in the longitudinal direction without the need of provision of any special piping.

Abstract: A thermostatic valve arranged in the coolant circuit of an internal-combustion engine, has a main valve which is acted upon by cold coolant flow on the one side, and by hot coolant flow on the other side. The valve is actuated as a function of the coolant temperature by way of an expansion material element equipped with an electric heating device. To minimize the coldside influence onto the expansion material element, a capsule which stores the expansion material, has an end which limits the expansion material lower at the level of the closed main valve or on the mixing chamber side. At this end, a ring-shaped or sleeve-shaped heating element is arranged coaxially adjacent the control pin, or, individual heating elements are distributed along the circumference of the control pin in an adjacent manner.

Abstract: A four-cycle outboard motor has a lubricating system designed with external gas transfer pipes. Additionally, an internal gas transfer passageway is arranged to encourage the gases contained within the lubrication pan to be expelled through the secondary passageways without substantially blocking a lubrication return line from a camshaft chamber or a crankshaft chamber. The outboard motor features an inline vertically oriented cylinder bank, such that oil introduced at an upper region and drains back to a lubrication pan through the lubrication return passageways arranged at a lower portion of the camshaft chamber and the crankshaft chamber.

Abstract: It is an object of the invention to provide an air scavenging two-stroke cycle engine capable of smoothly supplying fuel-air mixture into a combustion chamber, reducing the number of parts to thereby reduce cost, and suppressing the blow-by of the fuel-air mixture. An air scavenging two-stroke cycle engine that introduces fuel-air mixture Introduced into a crank case, through an intake port into a combustion chamber from a first scavenging port, comprising: an air passage; a communicating passage; and a second scavenging port, wherein the second scavenging port is formed in a cylinder such that it is disposed above the intake port and has an upper end higher than an upper end of the first scavenging port, the air passage is connected to the second scavenging port for introducing air through a check valve, and a portion of the air passage that is situated downstream from the check valve communicates with an inside of the crank case through the communicating passage.

Abstract: A method and system for detecting and correcting a Hot Manifold condition that occurs in turbocharged diesel engines where intake air used for combustion exceeds an acceptable operating temperature where sensors monitor conditions indicative of the Hot Manifold condition and power level reduction, speed control limits, varying coolant system operations, and cycling flow valves are controlled by a processor to correct the Hot Manifold condition.

Abstract: In a method and apparatus for detecting exhaust-gas-impairing and catalyst-damaging misfires in an internal-combustion engine, having a lambda probe arranged behind a catalyst, combustion misfires in at least one cylinder of the internal-combustion engine are detected by analysis of rotational engine speeds (or by another technique for detection of the erratic running of the engine). To improve the diagnosis of exhaust-gas-impairing of catalyst-damaging misfires a two stage method is provided to determine the lambda probe voltage, to assign it to the detected combustion misfires and to determine the respective type of misfire as a function of the probe voltage.

Abstract: An internal combustion engine and its method of operation which is designed to operate on a six-stroke cycle and which may include at least one but preferably a plurality of piston and cylinder assemblies each of which are characterized by a cylinder having a piston reciprocally mounted therein and intake an exhaust valves cooperatively mounted to regulate fluid flow into and out of the cylinder. An injection assembly is connected to each of the piston and cylinder assemblies and structured to inject water into the cylinder during a predetermined portion of the six-stroke cycle. A central processor is responsive to signals received from a sensor assembly mounted on the internal combustion engine at strategic locations so as to determine the energy content within the one or more cylinders and thereby regulate and control the timing and quantity of the injected water.

Abstract: A four stroke combustion engine and method of operation of use and control is disclosed. The engine includes a combustion chamber with an intake manifold coupled to the combustion chamber. A one-way valve is located within the intake manifold. The engine includes an intake valve for modulating the flow of a fuel-air mixture into and out of the combustion chamber. The engine preferably employs a fixed, late closing intake valve. A plenum chamber is located in the intake manifold. The plenum chamber is located downstream of the one-way valve and upstream of the intake valve. During the compression stroke of the engine, a pressurized charge of fuel-air mixture is stored within the manifold and plenum. The amount of the fuel-air mixture stored within the plenum is controlled by adjusting the volume of the plenum, or, alternatively, a plenum valve is used to regulate the amount of fuel-air mixture entering/exiting a fixed volume plenum.

Abstract: A programmable computer controlled electric oil pump drive for engines includes an electric motor, coupler assembly, programmable controller, and mounting plate. A motor drive shaft of the electric motor is coupled to the pump drive shaft of the oil pump through the coupler assembly. The rotation of the electric motor is controlled by the programmable controller. The programmable controller is powered by an engine alternator. The programmable controller also receives a speed signal from a source in the engine electrical system. The programmable controller preferably supplies the electric motor with voltage according to a look-up table or an algorithm. The speed of the oil pump is adjusted according to the engine speed as defined by the look-up table or the algorithm. The speed of the electric motor may be monitored by the programmable controller. If the motor is not rotating or speed of motor is too slow, an audible alarm is provided.

Abstract: An outboard motor has a fuel injected internal combustion engine operating on either a two-cycle or four-cycle principle. In some embodiments, the engine is directly injected while in others it is indirectly injected. The engine features one of a number of methods for reducing the temperature of injector drivers. The methods include sensing the temperature of the injector drivers and decreasing the engine speed if the temperature exceeds a predetermined temperature. Another method involves sensing the duration of a high-speed, high-load operating condition and slowing the engine speed if the duration exceeds a predetermined time period. Yet another method involves activating a cooling fan if the temperature of the injector drivers exceeds a predetermined temperature and activating a warning device if the temperature does not decrease with the fan operating.

Abstract: A two piece intake valve for internal combustion engines comprising an inner and an outer valve which can be designed with orbicular heads. The inner valve including a stem of a smaller outer diameter than the outer valve. The outer valve including a hollow stem large enough to accept the inner valve stem, an inner valve guide, and an inner valve control spring and retainer mechanism. The outer valve also including a valve seat in the center of its bottom face to seat the inner valve. The head, or base, being equipped with one or more vents which communicate between the intake port and the combustion chamber and being releasably opened and sealed off by the inner valve. The vented valve unit incorporating an independent actuation means by way of pressure differentials created by the induction cycle, and/or directional inertia factors of the mechanically controlled valve element. The vented valve unit also incorporating design features to effectively control and dampen inner valve closing.

Abstract: The present invention relates to a supplementary lubrication system for an internal combustion engine operable to lubricate the engine and an accessory prior to engine start-up and to lubricate the accessory after engine shut-down. The supplementary lubrication system includes an oil source in fluid communication with a supplemental oil supply conduit, which branches to define two parallel conduits, a prelube branch and a postlube branch. Disposed within the prelube branch is a prelube one-way check valve and disposed within the postlube branch is a postlube one-way check valve. The prelube branch is in fluid communication with a first end of a two-directional pump and the postlube branch is in fluid communication with a second end of the two-directional pump.