摘要:
A preformed article for a cylinder head, includes: a first portion where a first through hole is to be formed from an upper wall portion to a central portion which is a portion, of a bottom wall portion, forming a combustion chamber of an internal combustion engine; and a second portion where a second through hole is to be formed to the central portion from an outer wall portion (for example, the upper wall portion) positioned above an intake port which opens to the central portion. The first portion and the second portion are portions where a cooling water passage is not formed.
摘要:
The invention is directed to a variable compression ratio internal combustion engine in which the compression ratio of the engine can be varied and multiple types of fuels having different combustion velocities are used. The invention provides a technology for achieving excellent engine performance for respective types of fuels. In the variable compression ratio internal combustion engine in which the compression ratio can be varied and multiple types of fuels having different combustion velocities are injected through multiple fuel injection valves, maps from which a target compression ratio of the internal combustion engine is read out are switched in accordance with the fuel used, thereby suppressing knocking or other disadvantages.
摘要:
A hybrid piston engine-pulsed detonation engine structure is provided for obtaining shaft power from a pulsed detonation engine wherein a piston engine operatively connected to a PDE. A deflagration to detonation transition is used to achieve detonations. The piston engine has a piston that is located in the deflagration region of the deflagration to detonation transition. The hybrid engine has a critical starting frequency, above which the engine will self-actuate and produce excess power.
摘要:
Early stage detection of engine liquid cooling problems is provided with temperature, pressure and other sensors and associated logic circuits configured for detecting alarm conditions including below normal static coolant pressure coupled with an elevated coolant temperature, above normal static coolant pressure, below normal coolant pump pressure condition, coolant voids due to coolant loss or boiling, and external steam or liquid leakage from the cooling system. A gauge displays the difference between coolant pump output pressure and static coolant pressure.
摘要:
A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.
摘要:
An apparatus and method for converting a fuel injected internal combustion engine normally operated with a conventional fuel such as gasoline to operate with an alternative fuel are disclosed. The apparatus comprises an alternative fuel introduction assembly having at least one alternative fuel injector, a temperature sensor, and an electronic translator. The electronic translator is adapted to receive conventional fuel injector control signals generated by an electronic control module, and to receive an output signal from the temperature sensor. The electronic translator then calculates an alternative fuel injector control signal to facilitate the supply of a required energy amount of the alternative fuel. The calculation is based upon the energy content of the alternative fuel, the temperature of the alternative fuel, and the flow and operating characteristics of the alternative fuel injector relative to a conventional fuel injector. Preferably, the alternative fuel is natural gas.
摘要:
The invention concerns a method for operation of a four-stroke reciprocating internal combustion engine with a homogenous lean base mixture of air, fuel and retained exhaust, as well as with compression ignition and direct fuel injection into a combustion chamber with gas displacement devices.In order to keep the design cost low for this concept, the reciprocating internal combustion engine is operated at partial load with compression ignition and preferably mechanically controlled exhaust retention, whereas operation in the full load and high partial load range occurs as a spark ignition engine.
摘要:
A method of detecting leakage through a gaseous fuel admission valve of a dual fuel engine including at least one such gaseous fuel admission valve and a gaseous fuel shut off valve includes determining a liquid fuel rate when the engine is operating in a liquid fuel mode and the gaseous fuel shut off valve is closed. The gaseous fuel shut off valve is thereafter opened while the engine is operating in the liquid fuel mode. A liquid fuel rate is determined after the gaseous fuel shut off valve is opened and the liquid fuel rate determined before opening of the gaseous fuel shut off valve is compared with the liquid fuel rate determined after opening of the gaseous fuel shut off valve. A detonation level within the engine cylinder may also be checked to determine if such detonation level exceeds a predetermined level indicative of gaseous fuel leakage. The detonation level check may also be utilized in a spark-ignited engine.
摘要:
A single cylinder head design used for a series of engines using different cylinder bore diameters with a small diversity of parts. The cylinder head mounting holes and the valve stem guide openings for the breathing valves 4, 4a are the same for the series of engines. The cylinder head 2 is designed for the internal combustion engine of the series having the largest cylinder, wherein the valve disks 6 extend into the cylinder peripheral region of the part of the cylinder head 2 cooperating with the cylinder in forming the combustion chamber. When the cylinder head 2 is used for a small bore diameter engine of the series, the cylinder head is equipped with valve seat inserts 7a having a small diameter valve seating face and the valves have a corresponding smaller diameter complimentary seating face.