摘要:
An air-fuel ratio sensor that outputs a sensor signal used for the feedback control of an air-fuel ratio is provided. It is determined whether an element crack is present by applying a reverse voltage to the air-fuel ratio sensor. The value of the sensor signal output from the air-fuel ratio sensor is corrected during a time period “A”. The time period “A” consists of a reverse-voltage application time period in which the reverse voltage is applied, and a return time period “T” after application of the reverse voltage ends. The return time period “T” is set based on sensor impedance correlated with the internal resistance of the air-fuel ratio sensor. The return time period “T” decreases as the sensor impedance decreases.
摘要:
A function reconfigurable semiconductor device is provided. The function reconfigurable semiconductor device includes a plurality of function cells, each of the function cells being a basic unit which realizes a function; each of the function cells including a plurality of threshold elements; each of the threshold elements including means which stores a threshold value; and wherein a function which is realized by the function cell is determined by determining the threshold value in each of the threshold elements. In addition, the semiconductor device includes a nonvolatile memory which stores data for realizing the function in the function cells.
摘要:
A catalyst deterioration detecting device of the invention has exhaust emission purifying catalyst on an exhaust passage of an internal combustion engine and air-fuel ratio sensors provided upstream and downstream of the exhaust emission purifying catalyst, respectively, and detects the deterioration of the exhaust emission purifying catalyst based on the outputs of the air-fuel ratio sensors. An index characteristic value of catalyst deterioration is calculated from the outputs of the air-fuel ratio sensors, a time-lapse changing ratio of the calculated index characteristic value of catalyst deterioration is calculated, and the deterioration of the exhaust emission purifying catalyst is determined based on the calculated time-lapse changing ratio.
摘要:
A travel motor hydraulic control system for a construction machine having a plurality of hydraulic pumps which supply individually pressurized fluid for a plurality of hydraulic travel motors and a plurality of flow control valves which control the flow rate of the pressurized fluid to be supplied to the motor during an ordinary work. A controller receives a control signal representative of a travel control lever stroke sensed by a position sensor and a control signal detected by a pressure sensor, determines if the vehicle is traveling up a slope, and transmits a command signal to a solenoid operated valve to move a pilot operated shut off valve toward a valve-closing position, thereby the travel hydraulic motors are individually supplied the pressurized fluid from the hydraulic pumps.
摘要:
This invention pertains to a rotor core (6) in which a plurality of core sheets (1) are laminated on one another on a rotor shaft (4). A plurality of slits (3, 7) and a plurality of strips (2) are alternately arranged in a radial direction of each of the core sheets (1) so as to convexly confront a center of each of the core sheets (1) such that an outer peripheral rim (10) is formed between an outer peripheral edge of each of the core sheets (1) and each of opposite ends of each of the slits (3, 7). A stress concentration portion (11) which is provided at a portion (10a) of the outer peripheral rim (10) and has a width (L1) larger than that of the remaining portions of the outer peripheral rim (10).
摘要:
An air-fuel ratio control device for an internal combustion engine having an intake passage and an exhaust passage with a three way catalytic converter. The device comprises a fuel injector for injecting fuel and an air-fuel ratio detector for detecting an air-fuel ratio in the engine cylinder, which is arranged in the exhaust passage upstream of the three way catalytic converter. A first estimation device estimates an amount of intake air actually fed into the engine cylinder. A first decision device decides a target amount of fuel which must be fed into the engine cylinder to realize the stoichiometric air-fuel ratio, on the basis of the amount of intake air estimated by the first estimation device. A second estimation device estimates an amount of fuel actually fed into the engine cylinder, on the basis of the air-fuel ratio detected by the air-fuel ratio detector, and the amount of intake air estimated by the first estimation device. A second decision device decides an amount of fuel actually injected by the fuel injector such that a difference between the amount of fuel estimated by the second estimation device and the target amount of fuel decided by the first decision device, and a time integration value of the difference are made to converge to "0" at the same time.
摘要:
In an air-fuel ratio feedback control system including at least one air-fuel ratio sensor downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is controlled in accordance with the output of the downstream-side air-fuel ratio sensor. When at least one of the air-fuel ratio feedback control conditions for the downstream-side air-fuel ratio sensor is not satisfied the controlled air-fuel ratio is made an air-fuel ratio by an open loop control, while all the air-fuel ratio feedback control conditions for the downstream-side air-fuel ratio sensor are satisfied the controlled air-fuel ratio is made the stoichometric ratio (.lambda.=1) in accordance with the output of the downstream-side air-fuel ratio sensor. For a period after all the air-fuel ratio feedback control conditions for the downstream-side air-fuel ratio sensor are satisfied, the control by the output of the downstream-side air-fuel ratio sensor is prohibited, but, the controlled air-fuel ratio is made the stoichiometric ratio (.lambda.=1) by an open loop control or by the output of an upstream-side air-fuel ratio sensor.
摘要:
A fuel injection control device in which the amount of fuel injected by the fuel injector is increased at the time of acceleration. Namely, at the time of acceleration, the lean time and the rich time of the air-fuel mixture are calculated during the lean-rich discriminating time, which is basically equal to a time of an occurence of the lean time and the rich time when the air-fuel ratio is maintained at the stoichiometric air-fuel ratio at the time of acceleration. When the lean time becomes considerably longer than the rich time, the amount of fuel injected by the fuel injector is further increased.
摘要:
A method for feeding a solid-liquid mixture comprised of a liquid and a solid having a specific gravity greater than that of the liquid comprising depositing the solid component around a feed opening disposed at the bottom of a mixing container and feeding the solid-liquid mixture to a container for packing the same through the opening is provided and the method can effectively be carried out utilizing an apparatus comprising a mixing container, a feed opening disposed at the bottom of the mixing container, a feed controlling device disposed below or within the feed opening and characterized in that it comprises a collecting device for depositing the solid component of the mixture around the feed opening. The present invention makes it possible to feed the solid-liquid mixture in a desired constant mixing ratio since the ratio can easily be controlled by simply depositing solid component around the feed opening and changing the cross-section of the flow path at any position from the feed opening to the chute member.
摘要:
The fuel supply amount to an engine is gradually decreased directly after engine startup from a startup fuel supply to an after-startup fuel supply.