Abstract:
A combustion chamber and method of operating a diesel engine to insure maximum air utilization. The engine has a main chamber and a subchamber that communicates with the main chamber through a communication passageway. Fuel injection into the subchamber is begun at a time when the throat area of the engine by which the main chamber communicates with the communication passageway is equivalent to approximately the effective flow area of the communication passageway so as to insure maximum air utilization.
Abstract:
A multi-cylinder engine of a crankcase compression type shown for use in an outboard motor. The engine has a very compact V type arrangement. The intake system for admitting the charge to the crankcase chambers and the exhaust manifold is located in the valley between the cylinder banks. The compressor delivery to the cylinder head intake ports is on the outside of the engine.
Abstract:
A four-cycle internal combustion engine wherein the piston connecting rod crankshaft and crankcase chamber are formed so that the crankcase chamber acts as compressor. An induction system supplies atmospheric air to the crankcase chamber and a pressure conduit supplies air from the crankcase chamber to the engine intake valve. A plenum chamber is disposed within this pressure conduit and pressure control is possible by bypassing air form the plenum chamber to the atmospheric air inlet. A throttle valve is positioned downstream of the plenum chamber so as to improve engine braking and charge forming systems are disclosed that permit a compact assembly and good response under all engine running conditions.
Abstract:
An accumulator type fuel injector system including an arrangement for insuring that the injector will provide a relatively constant rate of fuel discharge under low speed low load conditions and a rate of discharge under high speed high load conditions that reaches its peak at the latter portion of the injection valve opening cycle. This is done by changing the effective areas of the various components of the valve, the preload of the biasing spring and the rate of the biasing spring.
Abstract:
An accumulator type of fuel injection nozzle that permits greater control of the desired fuel discharge rate by achieving a triangular form of discharge with lesser amount of fuel being discharged during initial opening of the injection nozzle. This is achieved by selecting the preload of a spring that urges the injection valve to its closed position in accordance with formula set forth herein. The load and speed of the engine is controlled by varying the duty cycle of the injection nozzle and the pressure of the fuel supply to it.
Abstract:
An accumulator type fuel injection nozzle including a resistor in the actuating electromagnet of the relief valve for controlling the operation of the valve. In the illustrated embodiment, there are provided two electromagnets, one of which opens the relief valve and the other of which closes the relief valve. In addition, a thermistor is provided in the circuit to the electromagnet so as to render the device substantially temperature insensitive.
Abstract:
An internal combustion engine in which a fuel evaporated in a fuel tank is stored in a crankcase, including a system for preventing the evaporated fuel from being emitted into the atmosphere. The crankcase is in communication with an intake passage through a breather passage and with the atmosphere through an atmospheric vent. Change-over means provides communication between the crankcase and the intake passage while the engine is running, and vents the crankcase to the atmosphere when the engine is stopped.
Abstract:
In an electric vehicle driven by a drive motor with electric power generated by an engine-driven generator and with electric power from a battery, the electric vehicle includes a residual battery power detecting module for detecting a residual power capacity of the battery, and a motor control module. When the residual power capacity decreases below an established (e.g., preset) lower limit, the motor control module lowers a voltage of an accelerator output signal, which is output in response to a rotational angle of an accelerator, to a value less than a voltage given under a condition where the residual power capacity is greater than or equal to an established (e.g., preset) lower limit. In this manner, the larger rotational movement of the accelerator required to control a rotational speed of the drive motor provides a rider with a sensory indication of the operating state of the vehicle (e.g., the residual power capacity of the battery).
Abstract:
Several embodiments of crankcase compression supercharged four-cycle internal combustion engines. Supercharger pressure is controlled by bypassing pressurized gases from the crankcase back to the crankcase downstream of a check valve that permits flow into the crankcase so as to avoid the escape of pressurized gases to the atmosphere and to reduce pumping losses and improve performance. Various positioning of the components is illustrated. Also, an improved and simplified internal EGR system is employed.
Abstract:
A number of embodiments of vehicles such as scooters that are powered a compact, high performance, four-cycle crankcase compression supercharged internal combustion engine. The engine is provided with two throttle valves, one on the intake side and one on the compressor side, that are operated simultaneously and in the same direction under at least some conditions so as to improve throttle response. In addition, an arrangement is provided for limiting the maximum pressure in the compressor side under low throttle and low load conditions. This improves performance and ensures against seal degradation in the lubricating system.