Abstract:
A variable valve apparatus for an internal combustion engine includes a control shaft, a camshaft having first and second camshaft members rotatable relative to each other, a rotary cam rotating together with the second camshaft member for opening and closing of an exhaust valve, an eccentric drive cam rotating together with the first camshaft member, a rocker arm caused to swing with rotation of the eccentric drive cam, a swing cam caused to swing by the rocker arm for opening and closing of an intake valve, a control cam formed on the control shaft to change an operating position of the rocker arm according to a rotational phase of the control shaft and vary the amount of swinging movement of the swing cam, a phase control mechanism adapted to control a relative rotational phase of the first and second camshaft members and an actuator for rotating the control shaft.
Abstract:
In a variable valve actuation system of an internal combustion engine employing a variable valve actuator capable of variably adjusting at least intake valve closure timing depending on engine operating conditions, a processor of a control unit is programmed to phase-advance the intake valve closure timing to a predetermined timing value after a piston top dead center position and before a piston bottom dead center position on intake stroke during at least one of an engine starting period and an engine stopping period. The variable valve actuator includes a biasing device by which the intake valve closure timing is permanently biased toward the predetermined timing value.
Abstract:
There is provided an actuator device for a variable valve apparatus. The variable valve apparatus has a control shaft to vary operation characteristics of an engine valve by an axial movement thereof. The actuator device has a rotatable screw shaft, a movable member axially movable with rotation of the screw shaft and a transmission mechanism unit that converts an axial movement of the movable member to the axial movement of the control shaft. An amount of the axial movement of the movable member is larger than an amount of the axial movement of the control shaft.
Abstract:
In a control apparatus of a supercharged internal combustion engine, a variable valve actuation system interacts with an engine control system. A controller is configured or programmed to increase an intake-valve lift by a variable valve lift mechanism, which is provided for variably controlling at least the intake-valve lift of engine valves, when starting from a vehicle stand-still state or when accelerating from an idling state or a light load state. The controller is further configured or programmed to increase a valve overlap of intake and exhaust valves by a variable phase control mechanism, which is provided for variably phase-shifting a central phase angle of a valve lift characteristic curve of at least one of the intake and exhaust valves, while increasing a boost pressure of intake air introduced into an engine cylinder by a supercharging device, after the intake-valve lift has been increased.
Abstract:
Fluctuations in output of an AC electric motor are restrained without increasing electromagnetic noise of a boost converter. When subjecting the AC electric motor to rectangular wave voltage control, output torque T is controlled by varying a voltage phase φv. In a region where a voltage phase is large (φv=θ2), fluctuations in torque T relative to changes in a DC voltage VH corresponding to the amplitude of a rectangular wave voltage are larger than in a region where the voltage phase is small (φv=θ1). The AC electric motor is controlled such that the rectangular wave voltage control in a region where voltage phase φv is larger than a limit-phase line PLN indicated by a set of limit phases set for each DC voltage VH is avoided.
Abstract translation:在不增加升压转换器的电磁噪声的情况下,可以抑制交流电动机输出的波动。 当对交流电动机进行矩形波电压控制时,通过改变电压相位来控制输出转矩T。 在电压相位大的区域(&phgr; v =η 2)中,与矩形波电压的振幅对应的直流电压VH相对于变化的转矩T的波动大于电压相位 是小(&phgr; v =&thetas; 1)。 控制交流电动机,使得在电压相位v大于由针对每个直流电压VH设定的一组极限相指示的极限相线PLN的区域中的矩形波电压控制被避免。
Abstract:
A failure detection device for a vehicle that detects a failure of a motor system includes a controller that changes a sensitivity for detection of a failure in the motor system in accordance with at least one of an operational condition of the motor system and a situation in which the motor system is operating.
Abstract:
A variable valve control apparatus includes: a variable valve actuating mechanism arranged to vary a closing timing of an intake valve; and a controller configured to advance the closing timing of the intake valve before a bottom dead center of a piston of an intake stroke until a load of an engine increases from a minimum load to a predetermined load, and to retard the closing timing of the intake valve from a timing before the bottom dead center of the piston, to a timing after the bottom dead center of the piston when the load becomes the predetermined load.
Abstract:
A variable valve actuating apparatus for an internal combustion engine includes an exhaust valve operating angle varying mechanism, and an exhaust valve timing varying mechanism. When the internal combustion engine is at rest, the exhaust: valve operating angle varying mechanism sets an exhaust valve operating angle relatively small, and the exhaust valve timing varying mechanism sets an exhaust valve opening timing and an exhaust valve closing timing relatively retarded. Accordingly, when the internal combustion engine is at rest, the variable valve actuating apparatus sets the exhaust valve closing timing at or close to top dead center so as to enable startup of the internal combustion engine.
Abstract:
A conductive member for use in an image forming apparatus, a process cartridge including the conductive member as a charging member, an image forming apparatus including the process cartridge, a charging member, and a process cartridge and an image forming apparatus including the charging member. The conductive member includes a surface coated with a powder lubricant. The charging member includes a conductive member and a powder lubricant applied to a surface of the conductive member.
Abstract:
An electroconductive member including an electroconductive support, an electric resistance adjusting layer formed on the electroconductive support, and a top surface layer that coats the surface of the electric resistance adjusting layer, the top surface layer containing at least one oxygen-containing inorganic compound selected from among a composite oxide of silicon and aluminum, an oxygen-containing silicon compound, and an oxygen-containing aluminum compound.