JPH0331214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an automatic test device for a single engine.

B. Prior Art Conventionally, engines manufactured on an assembly line had a worker operating a throttle lever during the unit testing process to check engine feel, such as engine revving. This engine speed check visually and aurally checks how the engine speed changes when the throttle lever is suddenly raised or lowered by hand, and whether there is any abnormal vibration in the engine body. It mainly determines the quality of the engine's intake system and air-fuel mixture system. Such an engine feeling check by an operator is performed visually and intuitively by the operator, so the operator requires a skilled worker, and individual differences tend to appear in the quality judgment.

In addition, among the various items of individual engine tests, tests that require throttle lever operation such as power tests require a throttle wire connection between the test equipment and the test equipment in order to adjust the opening of the throttle lever. There was a problem in that the wire connection required taking into account the mounting position error between the engine and the test equipment and the operable range error of the throttle itself, which took time.

As a conventional technique for automatically adjusting the opening of the throttle lever of the engine mentioned above, a technique has been proposed in which the amount of accelerator operation, such as the amount of depression of the accelerator pedal, is automatically controlled by an actuator controlled by fluid pressure. -35802).

In this conventional technology, the accelerator pedal is driven by an actuator controlled by fluid pressure, the amount of operation of the accelerator pedal is detected by a displacement meter, and the actuator is actuated according to the deviation between the target accelerator operation amount and the amount of accelerator operation detected by the displacement meter. It is configured into an automatic operation control system that controls a solenoid valve that controls fluid pressure. By setting and changing the accelerator target operation amount according to a test program or the like using such an automatic operation control system, it is possible to automatically adjust the raising and lowering of the throttle lever.

Furthermore, in the prior art, an automatic operation control system is used to simplify the setting of the start point and end point of the accelerator stroke. For this start point setting, a target value is given from the starting point setting potentiometer instead of the accelerator target operation amount, and the potentiometer is set when the actuator operation amount reaches the start point position of the accelerator stroke by adjusting this target value. Obtain the value of as the starting point setting value. In addition, for the end point setting, the target accelerator depression amount is set to the maximum value, and a control system is installed that stops the solenoid valve that controls the fluid pressure of the actuator when the detected output of the displacement meter exceeds the set value of the end point setting potentiometer. The value of the potentiometer for setting the end point is set as the limiter value of the accelerator stroke, and the potentiometer is gradually raised. I am trying to get the end point setting value in the value.

By setting the start point and the end point as described above, the start point and end point setting values prevent the accelerator pedal from being pressed too much or returned too much in the coupling relationship between the actuator and the accelerator pedal or the throttle lever.

C Problems to be Solved by the Invention In the prior art, when setting the start and end points of the accelerator stroke, a potentiometer is adjusted while confirming that the amount of accelerator operation has reached the start and end points. Use the potentiometer values as start and end point settings.

This conventional technology is effective when installed and combined with an engine as an accelerator control device of an unmanned vehicle, etc., but as a unit test device for an engine, the positional relationship between the actuator and the engine is measured when the engine is carried onto a test stand. Since the position of the start and end points of the accelerator stroke varies from engine to engine, it is necessary to set the start and end points for each engine brought into the test stand, and the problem remains that the work is time-consuming. Note that pushing the throttle lever too much may damage the stopper. Furthermore, the starting and ending positions of the accelerator stroke are determined by visual confirmation by the operator, and the operation range of the throttle lever cannot be automatically recognized, so it cannot be applied to automatic engine test equipment.

The present invention makes it possible to automatically operate the engine throttle lever with an electric operating rod, and also to automatically recognize the operating range of the throttle lever for each individual engine, thereby making it easier to operate the throttle lever during individual engine tests. The purpose is to provide a verified automatic test device.

D. Means for Solving the Problems In order to achieve the above object, the present invention provides an apparatus for automatically testing a single engine carried onto a test stand from an assembly line on the test stand. An electric throttle device that can electrically operate the operating lever in the operating direction of the throttle lever by a servo motor by bringing the operating lever into contact with a throttle lever of an engine that has been installed, and detect the operating position of the operating lever; A servo motor control device that controls the operation output of the electric throttle device by giving an opening degree setting signal of the throttle lever as a target value and using a detection signal of the operation position as a feedback signal, and an engine that requires operation of the throttle lever. and a sequencer that provides a throttle lever opening setting signal to the servo motor control device during the test, and the sequencer provides an opening setting signal that gradually increases the throttle lever opening to the servo motor control device. fully open position determining means for detecting that the throttle lever has been stopped at the fully open position by the mechanical stopper from no change in the operating position detection signal under control by this means; When the throttle lever reaches the fully open position, the detection signal of the operating position is determined to be the fully open position of the throttle lever, and the fully open position and the gear of the operating lever and the throttle lever when the opening setting value is zero. and calculation means for calculating and setting the opening degree setting signal.

E Effect For the engine carried into the test stand,
An electric operation is performed in which the operating rod driven by the servo motor of the electric throttle device contacts and operates the throttle lever, and the operating position of the operating rod is detected for this operation, and the servo motor control device controls the electric throttle device. By automatically controlling the position of the operating lever, it is possible to automatically control the opening of the engine throttle lever.

Then, in order to automatically recognize the operating range of the throttle lever, the opening control signal given to the servo motor control device is gradually increased, and the position of the operating lever when the throttle lever is stopped by the mechanical stopper is determined. The detection signal allows the sequencer to automatically recognize the fully open position of the throttle lever. As a result, the operating range of the throttle lever can be automatically recognized, even if there is a misalignment between the engine brought to the test stand and the throttle lever operating device, or variations in the fully open position of the throttle lever, and the opening can be set and controlled. Make it easy and sure.

F Embodiment FIG. 1 shows the overall configuration of an automatic test apparatus according to the present invention. An engine 2 fixed on a pallet 1 is conveyed by a conveyor 3 to the front of a test stand 4, and is moved by a shuttle device 5 and rollers 6. The sample is then carried into the test stand 4. test stand 4
The engine 2 carried into the stand is fixed to the stand 4 by a clamping device (not shown) in addition to fixing the pallet 1 by raising the shot pin 7.

After completing the clamping of engine 2, first
The operating device for automatic operation of the throttle lever is driven. This automatic operating device has the configuration shown in FIG. Engine 2 throttle lever 2
An operating rod 8 is slidably provided on a guide frame 9 in the direction of the pushing operation of the lever 2A at a position opposite to A, and the other end of the operating rod 8 is rotatably attached to a rotary plate 10 at an offset position. . Therefore, the rotating plate 10
The rotation of the operating rod 8 causes the operating rod 8 to move linearly in the direction of the arrow shown in the figure, and the tip of the operating rod 8 comes into contact with and is pushed into the throttle lever 2A, thereby making it possible to control the throttle opening of the engine.

The rotating plate 10 is rotationally controlled by an electric throttle device 11 via a shaft 10A. As shown in FIG. 3, the electric throttle device 11 is connected to a servo motor control device 12 and a sequencer 13 to constitute an automatic operation control system for the throttle lever 2A.

In FIG. 3, the electric throttle device 11 includes a servo motor 11A that is directly connected to the shaft 10A or is connected via a reduction gear mechanism, and a potentiometer 11B that detects the rotational angular position of the shaft 10A. The rotary drive of the shaft 10A, that is, the operating position of the throttle lever 2A via the operating rod 10 is detected by the potentiometer 11B. The servo motor control device 12 is a sequencer 13
The servo motor 11A is driven in accordance with the throttle lever opening setting signal given from the potentiometer 11B, and the detection signal of the potentiometer 11B is fed back so that an automatic operation control system is configured to control the opening for this drive. This feedback signal is also given to the sequencer 13 as an opening detection signal. The sequencer 13 generates various control signals according to each test item of the engine itself, and outputs an opening setting signal according to the program during tests that require operation of the throttle lever 2A, such as feeling check and power test. Then, prior to setting the opening, a control output is generated to automatically detect the opening range (operation range) of the engine throttle lever 2A.

For automatic detection of this operating range, the sequencer 13
The maximum opening value Z is detected by an opening control means 13A and a fully open position determining means 13B provided in the opening control means 13A and fully open position determining means 13B.
After the engine 2 is clamped on the test table 4, the opening control means 13A outputs a signal for gradually increasing the opening from zero opening as an opening setting signal for the throttle lever 2A, and this output Electric throttle device 11 via changeover switch SW
Increase the opening to the maximum allowable.

At this time, the output current of the servo motor control device 12 is limited so that the output torque of the electric throttle device 11 is lower than the normal throttle lever operation torque in order to prevent damage to the lever 2A.
This restriction is performed by switching the torque command from the sequencer 13.

The servo motor control device 12 increases the rotation amount of the servo motor 11A of the electric throttle device 11 by increasing the opening degree setting signal by the above-mentioned opening degree control means 13A. As a result, the operating rod 8 comes into contact with the throttle lever 2A and increases the operating amount (opening degree) of the lever 2A, and when the throttle lever 2A is fully opened, the mechanical stopper of the lever 2A Stop. The fully open state of this lever 2A is the fully open position determining means 13B of the sequencer 13.
It is determined by This determination is made when there is no longer a change (increase) in the opening detection signal from the potentiometer 11B, and is determined from, for example, a time measurement or an integral value change by a timer provided in the fully open position determining means 13B.

Next, when the fully open position determining means 13B determines the fully open position of the throttle lever 2A, it generates a fully open detection signal at this timing, and transmits the opening signal detected by the potentiometer 11B at this signal timing to the throttle lever 2A. The absolute value is stored in the calculation means 13C etc. as the fully open position (100% opening) of 2A. This fully open position signal is used as the maximum opening value Z allowed for throttle lever operation in subsequent engine operation tests, and is used by the calculation means 13C to calculate and set the opening setting signal according to the test item. Further, the minimum value (opening degree zero) of the operation range of the throttle lever 2A is set or calculated as the gap between the throttle lever 2A and the operating rod 8, as will be described later.

After detecting the operation range of the throttle lever 2A described above, the arithmetic means 13C sets the opening degree necessary for the engine test. For this opening setting, the changeover switch SW is switched to the calculation means 13C side by hardware or software, the torque command is also returned to the torque required for opening control, and the opening control signal is sent accordingly so that there is no test. From this, the calculation means 13C determines the opening degree setting value and provides it to the servo motor control device 12 as an opening degree setting signal. This opening degree setting signal is set within the operating range allowed for the throttle lever 2A.

For example, in order to set the throttle lever 2A to an intermediate opening degree, the opening degree setting value of the throttle lever to be given as a target value to the servo motor control device is determined from the following equation.

X=(Z-a)×Y+a Here, X is the throttle lever opening setting (mm), Y is the throttle lever opening to be set (%), and Z is the throttle when the throttle is fully open. The lever operation amount (mm), α, is the gap (mm) between the operating rod 8 and the throttle lever 2A when the opening setting value is zero. If α can be set in advance as a value unique to the test device, then set that value; if it cannot be taken out as a unique value, a contact switch is provided at the tip of the operating rod 8, and it is calculated from the presence or absence of contact with the switch and the value of the potentiometer 11B. can do.

FIG. 4 shows a comparison between the throttle lever opening control signal and the actual throttle lever opening.
Based on the throttle lever opening control signal (0 to 100%) Y given to the calculation means 13C, the throttle lever 2 is
The actual opening X of A is set and controlled so that the maximum opening Z of the throttle lever is 100%.

G. Effects of the Invention As described above, according to the present invention, in order to perform automatic operation control of the throttle lever by electric operation,
Automatic throttle lever opening control is possible without operator intervention. In addition, the fully open position of the throttle lever can be automatically recognized for each engine, and the throttle lever opening setting can be automated. To enable accurate throttle operation without causing damage to the throttle while eliminating the need for visual confirmation and time-consuming adjustment of stroke variations. In addition, a dynamometer 1 is connected to the engine on the test table to measure its power.
4 (FIG. 1) and the sequencer 13, it is possible to automatically measure power using an arbitrary test pattern, and the time required for the test can be shortened.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an automatic test device according to the present invention, FIG. 2 is a configuration diagram of the operating mechanism of the throttle lever in FIG. 1, and FIG. 3 is a configuration diagram of the control device of the operating mechanism in FIG. 2. FIG. 4 is a diagram for explaining the throttle lever opening control mode. 1... Pallet, 2... Engine, 3... Conveyor, 4... Test stand, 5... Shuttle device, 6... Roller, 7... Shot pin, 8...
Operating rod, 10... Rotating plate, 11... Electric throttle device, 12... Servo motor control device, 13...
...Sequencer, 14...Dynamometer.

Claims (1)

[Claims] 1. In a device that automatically tests a single engine carried onto a test stand from an assembly line, a control rod is brought into contact with the throttle lever of the engine fixed on the test stand, and a servo motor is used to test the engine. An electric throttle device capable of electrically operating the operating rod in the operating direction of the throttle lever and detecting the operating position of the operating lever, and an opening setting signal of the throttle lever being given as a target value and detecting the operating position. A servo motor control device controls the operation output of the electric throttle device using the signal as a feedback signal, and a throttle lever opening setting signal is sent to the servo motor control device during an engine test that requires operation of the throttle lever. and an opening control means for supplying an opening setting signal to the servo motor control device to gradually increase the opening of the throttle lever, and an opening control means for supplying an opening setting signal to the servo motor control device to gradually increase the opening of the throttle lever. a fully open position determining means for detecting that the throttle lever has stopped at the fully open position from no change in the detection signal of the operating position; and a means for detecting the operating position when the throttle lever reaches the fully open position. A calculation means is provided for calculating and setting an opening setting signal from the operating rod and the throttle lever gap when the signal is set to the fully open position of the throttle lever and the opening setting value is zero. An automatic engine test device featuring: