Abstract: A lubricating oil feeding apparatus of an internal combustion engine can adjust an amount of oil fed to each bearing and provides for a reduced number of parts for a shaft portion structure of a starter driven gear. In the engine, a balancer shaft is synchronously rotated with a crankshaft. The crankshaft and the balancer shaft are rotatably supported on a split surface of a crankcase by plain bearings. Parallel oil passages communicate with oil holes provided in the plain bearings for exclusively feeding lubricating oil to at least the crankshaft and the balancer shaft. The opening areas of the oil holes provided in the plain bearings of the balancer shaft are smaller than the oil holes provided in the plain bearings of the crankshaft. An outer portion of a starter one-way clutch can also be integrally fitted on a rotor. A driven gear of the starter is connected to a starter drive gear of a starter motor by intermediate gears. The diameter D.sub.

Abstract: A diesel engine preheat system includes a temperature sensor for sensing the temperature of the engine coolant, engine heaters for heating the engine, and a microprocessor for calculating the duration of a preheat cycle. When an ignition switch is turned on, the microprocessor samples the output of the temperature sensor to determine the initial engine temperature. The microprocessor computes the required heating time from the initial temperature and a stored parameter representing the relationship between increase in temperature and heating time of the engine. The microprocessor energizes a relay to connect the engine heaters to a battery for the computed time. During the preheat cycle the microprocessor decrements the computed heating time and energizes a visual display to display the time remaining in the preheat cycle.

Abstract: A valve stem sealing system for an internal combustion engine has a valve guide and an elastomeric valve seal disposed therein. The valve guide is substantially cylindrical in shape and has a longitudinal axis and first and second ends. The valve guide also has a thermal insulating element defining the second end and an internal circumferential groove proximate to the second end. The elastomeric valve seal is disposed in the circumferential groove.

Abstract: An improved gaseous fuel delivery system and method (10) to improve performance of a gaseous fuel engine (30) by variably maintaining gaseous fuel pressure to the gaseous fuel engine (30). From a storage device (12), gaseous fuel flows to fuel pressure regulator (16) that variably and dynamically reduces the fuel pressure from the storage pressure and maintains the gaseous fuel pressure at the desired controlled supply pressure. Regulator controller (20) controls the fuel pressure regulator (16) in response to signal inputs (28, 34, 44, and 54) and maintain the gaseous fuel at the controlled supply pressure. Signal inputs (28, 34, 44, and 54) used by regulator controller (20) are derived from sensors such as fuel pressure sensor (24) an engine speed and/or intake manifold pressure sensor (34), fuel temperature sensor (42), and fuel composition sensor (52).

Abstract: A cooling manifold for large diesel engine systems, disposed between a lubrication oil cooler and the engine system coolant pumps. The manifold system provides an increased coolant flow area at the oil cooler outlet housing, with associated improvement in both the total coolant flow rate and the distribution of that flow in the oil cooler heat exchange tubes. The increased flow is provided by additional inlet ports, which also enhances the flow distribution. High velocity flow tubes direct a localized stream of high velocity coolant, obtained directly from the discharge of the engine coolant pumps via a recirculation line, to assure proper Net Positive Suction Head and prevent vortex void formation in the coolant pump suction during peak operating conditions. The manifold can be retrofitted on existing diesel engines, or installed in the engine system during manufacture.