摘要:
There are provided a control system and method and an engine control unit for an internal combustion engine, which are capable of determining an amount of fuel to be injected during a two-stage fuel injection combustion mode and a duration period of this mode such that stable combustion and smooth transition between combustion and smooth transition between combustion modes are ensured. The control system includes an ECU and a crank angle sensor. The ECU calculates a demanded torque PME demanded of the engine, and determines which of the homogenous combustion mode, the stratified combustion mode, and the two-stage fuel injection combustion mode should be selected as the combustion mode of the engine, based on the demanded torque PME. The ECU determines an injection time period ToutD during the compression stroke in two-stage fuel injection combustion mode based on the engine rotational speed.
摘要:
There are provided a control system and method and an engine control unit for an internal combustion engine including two types of variable valve mechanisms capable of changing a camp phase and a cam profile, respectively, which system is capable of determining an amount of fuel to be injected as a value suited to charging efficiency at the time by simplified calculation processing, thereby performing the fuel injection control properly in a simplified manner. The fuel injection control system includes an ECU. The ECU searches a map for a multiplier term Ati for a high-speed cam or low-speed cam based on the rotational speed of the engine and the cam phase, and a map for an addend term Bti for the high-speed cam or the low-speed cam based on the rotational speed of the engine and the cam phase. The ECU calculates a basic fuel injection time period Tibase as the sum of the product of an intake pipe absolute pressure PBA and the multiplier term Ati and the addend term Bti (Ati×PBA+Bti).
摘要:
There are provided a control system and method and an engine control unit for an internal combustion engine, which are capable of attaining a high combustion efficiency in both of a homogeneous and a stratified combustion modes, thereby improving drivability and fuel economy, as well as a control system for an internal combustion engine which is capable of ensuring stable combustion in both the modes. In one form of the invention, the control system includes an ECU for controlling ignition timing IG of an in-cylinder fuel injection type engine which is operated while switching the combustion mode between the homogeneous and stratified combustion modes. The ECU determines which of the homogeneous and stratified combustion modes should be selected.
摘要:
An ignition time controller for an internal combustion engine is provided for setting an ignition time such that it can rapidly converge to an appropriate value in accordance with a change in intake characteristics associated with a change in cam phase in either of a uniform combustion mode and a stratified combustion mode in a direct injection type internal combustion engine having a cam phase changing mechanism. The ignition time controller comprises a required torque determining unit for determining a required torque outputted by the internal combustion engine based on an engine rotational speed and an accelerator opening, a fuel injection time determining unit for determining a time at which a fuel is injected into a cylinder, a basic ignition time determining unit for determining a basic ignition time based on the engine rotational speed and the required torque in the uniform combustion mode and based on the engine rotational speed and the fuel injection time in the stratified combustion mode, and a basic ignition time correcting unit for correcting the basic ignition time in accordance with a cam phase deviation between an actual cam phase and a target cam phase.
摘要:
There is disclosed a fuel injection control system for an internal combustion engine, which is capable of properly determining fuel injection timing such that the fuel injection timing reflects behaviors of injected fuel, thereby improving drivability and fuel economy. The internal combustion engine of an in-cylinder fuel injection type is operated while switching between a stratified combustion mode in which fuel injection into each cylinder is performed during a compression stroke and a homogenous combustion mode in which the fuel injection into the cylinder is performed during an intake stroke. The fuel injection control system controls fuel injection timing. A required fuel injection time is determined based on detected operating conditions of the engine. A direct ratio and a carry-off ratio are determined based on the operating conditions of the engine. The required fuel injection time is corrected by using the direct ratio and the carry-off ratio, whereby a final fuel injection time period is determined. Based on the engine rotational speed and the final fuel injection time period, the fuel injection timing is determined.
摘要:
There is provided a power detection circuit capable of appropriately adjusting detection voltage characteristics by using simple configuration. The power detection circuit includes a first resistor having current applied thereto to adjust a detection voltage value of input power, an element having an applied voltage and a load characteristic changed according to the input power, and a second resistor connected to the element and having current applied thereto when resistance of the element becomes relatively low, to adjust the detection voltage value of the input power. Detection voltage characteristics may be appropriately adjusted using a simple configuration.
摘要:
A construction machine includes: a lower propelling body; and an upper slewing body which is slewably mounted on the lower propelling body. The upper slewing body includes: an engine room provided with an intake opening and a discharge opening; a duct provided in the engine room so as to communicate with the discharge opening and an exhaust gas pipe which guides exhaust gas discharged from the engine into the duct. The discharge opening and an outlet of the duct are open downward from the engine room. A portion on a distal end side of the exhaust gas pipe is inserted into the duct. The duct and the exhaust gas pipe are configured to cause the exhaust gas to be mixed with cooled air in the duct and cause the mixture of the exhaust gas and the cooled air to be discharged downward from the discharge opening.
摘要:
There is provided an element mapping unit, scanning transmission electron microscope, and element mapping method that enable to acquire an element mapping image very easily. On the scanning transmission electron microscope, the electron beam transmitted through an object to be analyzed enters into the element mapping unit. The electron beam is analyzed of its energy into spectrum by an electron spectrometer and an electron energy loss spectrum is acquired. Because the acceleration voltage data for each element and window data for 2-window method, 3-window method or contrast tuning method are already stored in a database and accordingly the spectrum measurement is carried out immediately even when an element to be analyzed is changed to another, the operator can confirm a two-dimensional element distribution map immediately. Besides, because every electron beam that enters into an energy filter passes through the object point, aberration strain in the electron spectrometer can be minimized and higher energy stability can be achieved. As a result, drift of the electron energy loss spectrum acquired by analyzing the electron beam into spectrum can be minimized and element distribution with higher accuracy can be acquired.
摘要:
An ozone-decomposing agent including a first iron compound and a second iron compound is provided. The second iron compound may have a spinel type structure. The first iron compound of the ozone-decomposing agent may include an oxide selected from Fe2O3, FeO(OH) or Fe(OH)3. The second iron compound of the ozone-decomposing agent may include an oxide selected from MnFe2O4, ZnFe2O4, NiFe2O4, CuFe2O4 or CoFe2O4.
摘要翻译:提供了包含第一铁化合物和第二铁化合物的臭氧分解剂。 第二铁化合物可以具有尖晶石型结构。 臭氧分解剂的第一种铁化合物可以包括选自Fe 2 O 3,FeO(OH)或Fe(OH)3的氧化物。 臭氧分解剂的第二铁化合物可以包括选自MnFe 2 O 4,ZnFe 2 O 4,NiFe 2 O 4,CuFe 2 O 4或CoFe 2 O 4的氧化物。
摘要:
A scanning electron microscope which efficiently makes measurements for plural measurement items at a time and allows easy entry, confirmation and revision of auto measurement parameters. Parameters for creation of a line profile from an image captured by the scanning electron microscope are entered as auto measurement parameters (AMP) to be used as common conditions for all measurement items. Also, plural combinations of edge detection methods and measurement calculation methods are entered as auto measurement parameters to make measurements for plural items.