摘要:
A variable venturi carburetor comprises an auxiliary intake air passage, an auxiliary variable venturi and a non-adjustable nozzle portion, in addition to a main intake air passage, a main variable venturi and an adjustable nozzle portion. If the amount of intake air is small as when the engine is being idled, intake air is passed mainly through the auxiliary variable venturi to generate vacuum sufficiently high to jet fuel into the auxiliary intake passage through the non-adjustable nozzle portion. If the amount of intake air is great as when the engine is running under a heavy load, intake air is passed mainly through the main variable venturi. Since two venturis are formed, it is possible to smoothly increase the amount of fuel to be jetted into the intake passage over a wide engine operating condition.
摘要:
In an A/F ratio sensor of mixture supplied for an internal combustion engine, which has a detector for detecting the concentration of residual oxygen in exhaust gas and determines the A/F ratio by retrieving an air excess ratio table with an output of the detector, there is further provided an additional air introducing device, which introduces a predetermined quantity of air into the engine for a certain period of time, under the condition that the velocity of air flowing through a throttle valve is equal to the sonic velocity. The oxygen concentration detector is calibrated by the comparison of the outputs thereof before and after introduction of the additional air. According to this invention, the A/F ratio of the mixture can be detected accurately without the influence of the aged deterioration of the oxygen concentration.
摘要:
A first temperature sensor senses the temperature of intake air supplied to an internal combustion engine before the intake air is mixed with fuel supplied thereto. A second temperature sensor senses the temperature of the mixture of the intake air and fuel within the intake air passage. A control unit controls the fuel injection quantity in accordance with the difference between the sensed temperatures, thereby causing the actual air-fuel ratio to coincide with a desired air-fuel ratio. The desired air-fuel ratio is adjusted in accordance with the throttling effect of a throttle valve in the intake air passage and with engine speed.
摘要:
An evaluation information identifying device includes an extracting unit that, when, as a result of determining the presence or absence of a correlation between a supplier of an evaluation target and an evaluator having made a positive evaluation on the evaluation target, it is determined that there is a correlation, extracts evaluation information posted by the evaluator on the evaluation target provided by the supplier as specific evaluation information, and an outputting unit that performs specified processing based on the extracted specific evaluation information. It is thereby determined whether the possibility that the evaluator is an interested party to the supplier is high or low, and the evaluation information by an interested party to the evaluation target or the like is identified. It is thereby possible to provide useful evaluation information.
摘要:
An intake device for an internal combustion engine comprises an outwardly extending flange attached to a throttle barrel and a saucer-like member attached to the flange to form a ring-shaped intake passage therebetween. An air flow meter duct is arranged with the outlet disposed at the portion of the ring-shaped intake passage having the smallest cross-sectional area. The air flow velocity within the duct is equal to the velocity at this smallest cross-sectional area section, thus permitting measurement thereof by measuring the flow through the meter and scaling appropriately by the ratio of meter flow passage to intake passage cross-sectional areas.
摘要:
A channel for recirculating a portion of an engine exhaust gas to the induction passage has an intermediately arranged converging-diverging supersonic nozzle with a valve member arranged in the nozzle to vary the cross-sectional area of the channel at the throat, so that the mass flow rate of the recirculated exhaust gas depends solely on the cross-sectional area so far as the gas velocity at the throat is sonic.
摘要:
An information providing server includes a presentation request reception unit, a selection unit, a transmission unit, an answer reception unit, a storage unit and an updating unit. The presentation request reception unit receives a presentation request for a question requiring an answer from a terminal of a user. The selection unit selects one or more questions. The storage unit stores answer information in which a user ID, question IDs, and an answer status are associated, in an answer information storage unit, at a timing at which the questions selected by the selection unit are transmitted to the terminal if the user. Further, the selection unit extracts the answer information which includes the user ID and in which the answer status is unanswered, from the answer information storage unit, and selects questions corresponding to the question IDs of the extracted answer information as one or more questions.
摘要:
A primary passage and a secondary passage in a parallel relation to each other are disposed between an air cleaner and a branch passage collecting portion of an intake manifold. The primary passage is smaller in diameter than the secondary passage and has at the downstream end thereof a laval nozzle through which air flows at the speed of sound even under low-speed low-load engine operating conditions. The laval nozzle is connected to a carburetion chamber which is elongated straightly in the direction downstream of the laval nozzle. A fuel injection valve is disposed in the primary passage at a place upstream of the laval nozzle. A pressure control valve is adapted so that a vacuum higher than a predetermined value is developed in the carburetion chamber at any time. A primary throttle valve and a secondary throttle valve are interconnected so that the secondary throttle valve is held closed unless the primary throttle valve is fully open. The primary throttle valve is movable in response to an engine operating condition.
摘要:
A disc having first and second sets of markers thereon is rotated in sychronism with the crankshaft of an engine so that pickups associated with the disc produce pulse trains of two and three pulses per revolution of the crankshaft respectively. A circuit responsive to either the speed or load of the engine selectively connects one of the pulse trains to a fuel injection control circuit to induce the fuel injector to inject in synchronism with the pulses of the selected pulse train. Alternatively the pulses outputted by the ignition system are frequency divided and fed to the fuel injection control circuit.
摘要:
An evaluation information identifying device includes an extracting unit that, when, as a result of determining the presence or absence of a correlation between a supplier of an evaluation target and an evaluator having made a positive evaluation on the evaluation target, it is determined that there is a correlation, extracts evaluation information posted by the evaluator on the evaluation target provided by the supplier as specific evaluation information, and an outputting unit that performs specified processing based on the extracted specific evaluation information. It is thereby determined whether the possibility that the evaluator is an interested party to the supplier is high or low, and the evaluation information by an interested party to the evaluation target or the like is identified. It is thereby possible to provide useful evaluation information.