摘要:
A device for controlling an electromechanical transducer such as a proportional electromagnetic valve, in which a pulse signal having a constant period shorter sufficiently than the minimum response time required for the displacement of the plunger of the proportional electromagnetic valve over its predetermined full stroke is applied to the electromagnetic coil of the proportional electromagnetic valve to superpose a very small vibratory stroke component on the stroke of the plunger, and the duty cycle of the pulse signal applied to the electromagnetic coil is varied so as to urge the plunger in directly proportional relation to the variation of the duty cycle without substantially giving rise to mechanical hysteresis in the stroke of the plunger.
摘要:
A car exhaust gas purification device controlling circuit wherein a deviation between an output of an exhaust gas sensor and a set value is converted into a time-width signal and a proportional electromagnetic valve is controlled by an integrated output of the time-width signal to control the air-fuel ratio around a theoretical air-fuel ratio, whereby an offset of air-fuel ratio due to hysteresis of such as the proportional electromagnetic valve used for controlling the air-fuel ratio is eliminated.
摘要:
A power transistor device having a circuit provided with first, second, third and fourth transistors, wherein the first and the second transistors are connected in the Darlington configuration while the third and the fourth transistors are connected respectively between the base and the emitter of the first transistor and between the base and the emitter of the second transistor, so as to release the residual charges in the first and the second transistors therethrough by being rendered conductive in response to the inputs thereto.
摘要:
An apparatus which comprises a detector for detecting the density of one component (oxygen, for example) of exhaust gases from an internal combustion engine for regulating the ratio of air to fuel based on the detected value of the component in such a manner that the air-fuel ratio can be made approximate to the theoretical air-fuel ratio. The apparatus further comprises a first comparator having a hysteresis range and a second comparator having no hysteresis range for detecting the output of the detector for detecting the density of one component of exhaust gases, in order that variations in the characteristics of the detector or changes in its characteristics with time can be compensated for.
摘要:
A capacitance acceleration sensor and method of making same are disclosed. A capacitance acceleration sensor includes a movable electrode etched from a silicon plate which is clamped between two solid dielectric plate members of glass, silicon oxides, or oxygen oxides. Static electrodes are secured to surfaces of the dielectric members facing opposite the movable electrode, thereby providing easy manufacturing assessibility for leadout wires from these electrodes. In certain embodiments, the movable electrode is formed integrally with a monocrystalline silicon plate member which also contains an integrated circuit for generating an output acceleration signal in response to movement of the movable electrode when the assembly experiences acceleration forces.
摘要:
An oxygen sensor is disclosed in which an airtight reference chamber isolated from a surrounding space is formed on one main surface of a solid electrolyte, a current is supplied to the solid electrolyte to pump out oxygen from the reference chamber in such a manner that oxygen in the reference chamber is ionized and then passes through the solid electrolyte, means is provided for transferring oxygen from the surrounding space to the reference chamber in such a manner that oxygen in the surrounding space is ionized and then passes through the solid electrolyte, and the oxygen concentration in the surrounding space is detected on the basis of the current supplied to the solid electrolyte.
摘要:
A novel method of controlling air-fuel ratio for an internal combustion engine is disclosed, which comprises a memory area for holding regional compensation factors used for air-fuel ratio control, a memory area for holding new regional compensation factors obtained by learning, and a memory area for holding regional compensation factors based on the result of the learning immediately before the latest learning, thus rationalizing the new setting and updating proceses of regional compensation factors according to the result of learning.
摘要:
A combustion pressure detecting apparatus for generating an electrical signal in response to a combustion pressure of an internal combustion engine, wherein an electrical signal based on said combustion pressure is detected at a predetermined angle of rotation of said engine, the detected value being compared with a predetermined reference value to derive a difference therebetween, including correcting means for executing correcting operations in dependence on said difference.
摘要:
In a solid-state optical interferometer having a light path composed of a loop-shaped optical fiber and a solid-state light wave guide optically coupled to said optical fiber, electrodes for producing a surface acoustic wave (SAW) are formed as a pair on a surface of a substrate on which said solid-state light wave guide is formed, and said surface acoustic wave is used to apply optical modulation to a light beam passing through said solid-state light wave guide.
摘要:
A novel method of controlling air-fuel ratio for an internal combustion engine is disclosed, which comprises a memory area for holding regional compensation factors used for air-fuel ratio control, a memory area for holding new regional compensation factors obtained by learning, and a memory area for holding regional compensation factors based on the result of the learning immediately before the latest learning, thus rationalizing the new setting and updating processes of regional compensation factors according to the result of learning.