Abstract: A method of manufacturing a 3-dimensional model object by a powder bed fusion method using a resin granular material, in which the resin granular material comprises a resin powder (A) and a flow aid (B), a sphericity of the resin powder (A) is 80 or more and 100 or less, the resin powder (A) has a D80 particle size of 60 ?m or less and a D20 particle size of 1 ?m or more, the flow aid (B) is contained at an amount of more than 0.01 part by mass and less than 5 parts by mass with respect to 100 parts by mass of the resin powder (A), and steps (a) to (c) are performed in this order repeatedly.

Abstract: A polymer powder includes a polyamide, wherein a melting point determined in differential scanning calorimetry is 190° C. or higher, a difference between the melting point and a melting onset temperature, which is defined in differential scanning calorimetry as a lowest temperature among temperatures at each of which a first temperature differential value of Heat Flow (W/g) observed between a peak top temperature of an endothermic peak, observed when 10 mg of powder is heated at a rate of 20° C./min from 30° C. in a nitrogen atmosphere, and a temperature point of ?50° C. from the peak top, becomes ?0.2 (W/g.° C.), is less than 30° C., and a D50 particle size is 1 ?m or more and 100 ?m or less.

Abstract: First, second and third levers are disposed pivotably and rotatably relative to each other about a predetermined axis. The first lever is operated in association with an accelerator to be rotated in a predetermined one direction in accordance with operation in a direction of opening the accelerator. The second lever is operated in association with a throttle valve so as to open the throttle valve when the second levler is pivotted in the predetermined one direction and it is urged by a first urging member in a direction of closing the throttle valve. The first lever is provided with a first stopper section and the second lever is provided with a second stopper section as to be abuttable with the first stopper section from the predetermined one direction. The first stopper section is urged in such a manner as being brought into abut with the second stopper section by means of a second urging member larger in an urging force than the first urging member.

Abstract: An engine control system for suppressing vibration of a car body, primarily at acceleration thereof, by varying engine output torque. The system for suppression of the car body vibration takes into consideration car vibration detection delay time created by the intermittent detection of vibration data. The system includes a detector for intermittently detecting data relating to car body vibration, a period setting device for setting a period of car body vibration, a delay time setting device for setting a delay time corresponding to a detection delay time due to the intermittent detection of the vibration data detector, and a torque controller for controlling engine output torque by advancing a phase of engine output torque control timing by the delay time corresponding to the detection delay time, which is set by the delay time setting device, in each period of car body vibration set by the period setting device.

Abstract: A vehicle constant speed control system including a vehicle speed detector and a controller for controlling the engine throttle valve so that the engine output is controlled to make the vehicle speed approach a target speed. The controller compares the actual vehicle speed with the target speed and calculates a required driving torque for driving the vehicle at the target speed and a target throttle valve position which is required for producing the required driving torque. The controller then produces a driving signal to actuate the engine throttle valve so that the required driving torque is produced and the target speed is attained.

Abstract: An engine control system comprises an accelerator position sensor for detecting the amount of depression of the accelerator, a target intake air amount determining circuit which receives the output of the accelerator position sensor and determines a target intake air amount, a target fuel feed amount determining circuit which receives the output of the accelerator position sensor and determines a target fuel feed amount, a throttle valve driver which receives the output of the target intake air amount determining circuit and controls the throttle valve to obtain a target throttle valve opening degree corresponding to the target intake air amount, and a fuel feed control circuit which receives the output of the target fuel feed amount determining circuit and controls the amount of fuel to be fed to the engine to the target fuel feed amount.

Abstract: Engine throttle valve control device having a step motor to operate a throttle valve which comprises detecting means for detecting the need for changing the rotational direction of the step motor, and delaying means which delays the supply of the drive signal to the step motor for a predetermined period when the need for changing the rotational direction of the step motor is detected by the detecting means. In the present invention, when it is necessary to change the rotational direction of the step motor, the step motor is not immediately driven to reverse the rotational direction but is halted for a predetermined short time. After the short time passes the step motor is driven to rotate in the opposite direction. According to the present invention, the inertial force acting on the step motor when it changes its rotational direction can be avoided or decreased. Hence, loss of control of the step motor due to the inertial force is avoided, and accurate control of the throttle valve opening is performed.

Abstract: An internal combustion engine throttle valve control system comprising driving means for driving a throttle valve so that the opening of the throttle valve assumes a predetermined value, engine r.p.m. detecting means for detecting engine r.p.m., and control means for controlling the rate of driving the throttle valve which receive the output signal from the engine r.p.m.

Abstract: A control system for a vehicle engine comprises a first detector for detecting a controlled variable on an accelerator, a setting device for determining a fundamental control variable on an engine output adjusting device, such as a throttle valve, based on an output of the first detector, a driving device for actuating the engine output adjusting device in accordance with the fundamental control variable, a second detector for detecting a demand for acceleration of a vehicle, a compensating device for revising the fundamental control variable to produce a compensated control variable on the engine output adjusting device so that the engine output adjusting device is actuated in accordance with the compensated control variable when the demand for acceleration of the vehicle is detected by the second detector, a restoring device for restoring the engine output adjusting device at a predetermined restoration speed to be actuated in accordance with the fundamental control variable after the engine output adjustin

Abstract: A throttle valve control system comprises an accelerator position sensor for detecting the amount of operation of the accelerator, a throttle valve opening degree determining circuit which receives the output of the accelerator position sensor and determines the opening degree of the throttle valve, and a throttle valve driving device which drives the throttle valve to the position corresponding to the opening degree determined by the throttle valve opening degree determining circuit. The throttle valve opening degree determining circuit is arranged to determine the opening degree of the throttle valve with respect to the amount of operation of the accelerator so that the change in the opening degree of the throttle valve for a given change in the amount of operation of the accelerator is relatively small when the amount of operation of the accelerator is in an intermediate range and is relatively large when the amount of operation of the accelerator is above or below the intermediate range.