CN2665849Y

CN2665849Y - Rotary speed control demonstration apparatus for internal combustion engine

Info

Publication number: CN2665849Y
Application number: CN 03256046
Authority: CN
Inventors: 徐郁山
Original assignee: ZHEJIANG XINCHANG KANGLI ELECTRONIC CO Ltd; Xinchang Association Of Young Science And Technology Counselors
Current assignee: ZHEJIANG XINCHANG KANGLI ELECTRONIC CO Ltd; Xinchang Association Of Young Science And Technology Counselors
Priority date: 2003-07-25
Filing date: 2003-07-25
Publication date: 2004-12-22
Anticipated expiration: 2013-07-25

Abstract

The utility model discloses a gas engine rotate speed controlling demo device, relating to a teaching demo device, in particular to a gas engine rotation speed adjusting device controlled by a microcomputer. The utility model comprises a box body, a sensor and an accelerograph adjusting device. The utility model is characterized in that a main controlling board of the microcomputer and an accelerograph adjusting device are arranged in the box body; signals of the gas engine rotation speed sensed by the sensor is first to be treated by the main controlling circuit and then is transmitted to the accelerograph adjusting device. The accelerograph adjusting device comprises a step motor and a flexible shaft driven by an output shaft of the step motor; one end of the flexible shaft is connected with the accelerograph so as to control the magnitude of accelerograph and to adjust the gas engine rotation speed to a set value (the difference of rotation speed is controlled to be 25 rotate / minute). The whole device is simple and smart and has the high practicability and can match various sensors and executive devices, with the wide application scope. The operation is easy, and the utility model is suitable not only for teaching but for the operation by people of different technical levels, with the better social effect.

Description

Internal-combustion engine rotational speed control apparatus for demonstrating

[technical field]

The utility model relates to the rotation speed regulating and controlling device of the internal combustion engine of a kind of demonstration instrument for teaching, particularly microcomputerized control.

[background technology]

At present, in teaching,,, only be theoretic explanation often owing to lack demonstration instrument for adjusting, the control of internal-combustion engine rotational speed, this has certain degree of difficulty to teachers ' teaching, and the knowledge that the student understands this respect also has certain difficulty.

[utility model content]

The technical assignment of the technical problems to be solved in the utility model and proposition provides a kind of internal-combustion engine rotational speed control apparatus for demonstrating, this internal-combustion engine rotational speed control apparatus for demonstrating profile is small and exquisite, compact conformation is reasonable, directly perceived, easy to use, be a kind of can be as instruments used for education, again can the actual rotation speed regulating and controlling device that uses.Help teacher's explanation in teaching, the student is benefited to the scientific knowledge exploration interest to improving the student to the understanding of the knowledge of this aspect; It is easy to operate when reality is used.

The technical scheme that the utility model is taked is: a kind of internal-combustion engine rotational speed control apparatus for demonstrating, include casing, sensor, throttle adjustment mechanism, the master control borad and the throttle adjustment mechanism that are characterized in the micro computer governor circuit are positioned at casing, the internal-combustion engine rotational speed signal that sensor records after governor circuit is handled to throttle adjustment mechanism, described throttle adjustment mechanism is made of stepper motor and the flexible axle that driven by the stepper motor output shaft, one end and the throttle of flexible axle join, and come internal combustion engine is carried out speed governing by changing the throttle size.

Stepper motor in the throttle adjustment of the present utility model mechanism is fixed on a side of bracing frame, bracing frame is connected on the base plate, base plate can be put into casing, the stepper motor output shaft is a screw mandrel, the nut that matches with screw mandrel is positioned at the opposite side of bracing frame, the two ends of a slide bar parallel with screw mandrel are separately fixed at the both sides of bracing frame, one slide block that can slide is thereon arranged on the slide bar, one through hole is arranged on the slide block, the internal thread that matches with wire rod thread is arranged in the hole, slide block is by being threaded on the screw mandrel, a fixing end of flexible axle on the slide block, and the flexible axle other end and throttle join.The rotating drive screw mandrel of stepper motor rotates, the displacement of screw mandrel rotating band movable slider, and then affect flexible axle, and realize the size of control throttle, reach the purpose of regulating internal-combustion engine rotational speed.

Internal-combustion engine rotational speed control apparatus for demonstrating of the present utility model, the micro computer governor circuit adopts the MCS-51 series monolithic.

Internal-combustion engine rotational speed control apparatus for demonstrating of the present utility model, have rotating speed to put several dials, gauge tap and display screen on its tank surface, can switch at manual, automated manner, rotating speed is put several dial input speed setting values, display screen shows tachometer value, and is directly perceived and easy to operate.

Internal-combustion engine rotational speed control apparatus for demonstrating of the present utility model, adopt electronic sensor to detect internal-combustion engine rotational speed, with this signal input micro computer governor circuit, compare with the rotating speed of setting, send the Stepping Motor Control signal, the rotation of drive stepping motor drives the control of flexible axle realization to the throttle size, makes internal-combustion engine rotational speed adjust to setting value, (speed error is controlled at 25 rev/mins), package unit is simple, small and exquisite, practical, can cooperate various sensors and topworks, usable range is wide, easy to operate, not only be fit to classroom instruction, also adapt to the personnel operation of different technologies level, have good social benefit.

Below in conjunction with drawings and Examples the utility model is done further narration.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a control system block diagram of the present utility model.

Number in the figure explanation: 1-casing; 2-throttle adjustment mechanism, the 3-stepper motor; The 4-flexible axle; The 5-screw mandrel; The 6-slide bar; The 7-slide block; The 8-rotating speed is put several dials; The 9-gauge tap; The 10-display screen.

[embodiment]

Embodiment 1, structure of the present utility model is by seeing among Fig. 1, it includes casing 1, sensor (not shown), micro computer governor circuit, throttle adjustment mechanism 2, the master control borad of micro computer governor circuit and throttle adjustment mechanism 2 are positioned at casing 1, have rotating speed display screen 10 and rotating speed to put several dials 8 on the panel of casing, also have power switch, automatic/hand switch and gauge tap 9, gauge tap 9 comprise startup, stop, acceleration, retard button.This device is when carrying out speed regulating control to internal combustion engine, and the course of work of control system is referring to Fig. 2.Start the power switch of this device, put number by dial 8, set rotating speed, open automatic switch, sensor with the internal-combustion engine rotational speed signal that records through buffer circuit to the governor circuit single chip microcomputer, compare with the rotating speed of setting, one tunnel output signal of governor circuit to liquid crystal display, can be read the per minute rotating speed on the display screen 10 behind liquid crystal driver module AY0438; To stepper motor 3, buffer circuit adopts photoelectric coupled circuit to carry out channel separation to another road output signal of governor circuit through buffer circuit; Stepper motor rotating drive screw mandrel 5 rotates, and drives slide block 7 displacements, and then affects flexible axle 4, changes the throttle size, adjusts rotating speed to setting value thereby reach.The size that can regulate throttle automatically when load variations causes that rotating speed changes makes rotating speed return to setting value (error≤25 rev/min).When pressing stop button, internal combustion engine progressively slows down and cuts out fully until throttle, quits work, last powered-down switch.

The utility model also can adopt manual method, when selecting manual method, needs to press on the panel and quickens or retard button, and manually control is opened the throttle or reduced throttle with the controlling combustion engine rotating speed, realizes manually adjusting, until reaching required rotating speed.

Claims

1, a kind of internal-combustion engine rotational speed control apparatus for demonstrating, include casing (1), sensor, throttle adjustment mechanism, the master control borad and the throttle adjustment mechanism (2) that it is characterized in that the micro computer governor circuit are positioned at casing, the internal-combustion engine rotational speed signal that sensor records after governor circuit is handled to throttle adjustment mechanism, described throttle adjustment mechanism (2) constitutes by stepper motor (3) with by the flexible axle (4) that the stepper motor output shaft drives, and an end and the throttle of flexible axle join.

2, internal-combustion engine rotational speed control apparatus for demonstrating according to claim 1, it is characterized in that the stepper motor (3) in the throttle adjustment mechanism is fixed on a side of bracing frame, the stepper motor output shaft is a screw mandrel (5), the nut that matches with screw mandrel is positioned at the opposite side of bracing frame, on bracing frame, also be fixed with a slide bar (6) parallel with screw mandrel, one slide block that can slide thereon (7) is arranged on the slide bar, one through hole is arranged on the slide block, the internal thread that matches with screw mandrel (5) is arranged in the hole, slide block (7) is by being threaded on the screw mandrel, one end of flexible axle (4) is fixed on the slide block, and the other end and throttle join.

3, internal-combustion engine rotational speed control apparatus for demonstrating according to claim 1 is characterized in that the micro computer governor circuit adopts the MCS-51 series monolithic.

4, internal-combustion engine rotational speed control apparatus for demonstrating according to claim 1 is characterized in that having on the described tank surface rotating speed to put several dials (8), gauge tap (9) and display screen (10).