JPH1182146A - Discrimination device of kinds of engines and discrimination device of the number of cylinders - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save man-hour required to setting of kinds of engines by installing a means for detecting for constant time a pulse signal inherent in a gear having the number of teeth different every kind of engines and a means previously storing the number of teeth, and comparing the detected pulse signal with the number of teeth previously stored, for operation to discriminate the kinds of engines. SOLUTION: When a starter motor 13 is set ON to start a gas engine 11 in a gas engine heat pump system, a micro-computer 4 compares the number of pulses of a ring gear 12 detected by a ring gear sensor 14 during one revolution of a cam shaft 17 with the number of teeth previously stored in an outside control unit 2, for operation, and the kind of engine 11 is discriminated based on the operation result. According to the discrimination result, the optimum engine control program is selected from a plurality of engine control programs different every kinds of engines, and the gas engine 11 is controlled. By automatically discriminating the kinds of engines, the generation of a setting error is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine type discriminating apparatus capable of discriminating an engine type and the number of cylinders by detecting a value unique to each engine which differs depending on the type of the engine and the number of cylinders. The present invention relates to a cylinder number discriminating apparatus.

[0002]

2. Description of the Related Art Conventionally, in a control device for performing control according to the type of engine and the number of cylinders, a plurality of control devices having a control program corresponding to each model and the number of cylinders have been prepared.

Alternatively, one type of control device incorporating a plurality of control programs different for each model and number of cylinders is prepared, and each type and number of cylinders are stored in a memory of the control device.

[0004]

However, as described above, if a plurality of control devices each having a control program corresponding to each model and the number of cylinders are prepared, a control device corresponding to the model and the number of cylinders is required. This necessitates an increase in the number of management parts. Also, by preparing one type of control device incorporating a plurality of control programs that are different for each model and number of cylinders, and storing each model and number of cylinders in the memory of the control device, the man-hours and the setting device for that are required. There is a problem that a human error such as a setting error or a setting error may occur.

[0005]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, means for detecting a specific pulse signal of a gear having a different number of teeth for each engine model for a certain period of time during engine operation, means for storing the number of teeth in advance, and storing the detected pulse signal in advance. The engine is provided with means for comparing the calculated number of teeth with the calculated number of teeth to determine the engine type, so that the engine type can be determined.

Means for detecting a pulse signal unique to a gear having a different number of teeth for each engine model during one revolution of the camshaft during operation of the engine, and means for storing the number of teeth in advance. The engine is provided with means for comparing the detected pulse signal with the number of teeth stored in advance to determine the engine type, so that the engine type can be determined.

In the engine, means for transmitting a pulse signal unique to each number of cylinders, means for detecting the pulse signal for a certain period of time during engine operation, and means for storing the number of cylinders in advance are provided. The engine is provided with means for determining the number of engine cylinders by comparing and calculating the pulse signal and the number of cylinders stored in advance, so that the number of engine cylinders can be determined.

In the engine, means for transmitting a pulse signal unique to each number of cylinders, means for detecting the pulse signal during one revolution of the camshaft during operation of the engine, and storing the number of cylinders in advance Means for comparing the detected pulse signal with the stored number of cylinders to determine the number of engine cylinders by providing the engine with a means for determining the number of engine cylinders. is there.

[0009]

Next, an embodiment of the present invention will be described. FIG. 1 is an overall view of a gas engine heat pump provided with an engine type discrimination device and a cylinder number discrimination device of the present invention,
FIG. 2 is a diagram showing a flowchart for counting pulse signals detected from the camshaft, FIG. 3 is a diagram showing a flowchart for counting pulse signals detected from the ring gear, and FIG. 4 is a diagram showing detection during one rotation of the camshaft. FIG. 5 is a diagram showing the number of pulses of a ring gear to be performed, FIG. 5 is a diagram showing a flowchart for performing engine control based on a pulse signal detected from the ring gear, and FIG. 6 is an apparatus for detecting a pulse signal from a cam shaft and a crank shaft. FIG. 7 is a diagram illustrating a flowchart for counting pulse signals detected from the crankshaft, FIG. 8 is a diagram illustrating the number of crankshaft pulses detected during one revolution of the camshaft, and FIG. FIG. 5 is a diagram showing a flowchart in a case where engine control is performed using a pulse signal detected from the control unit.

First, a schematic configuration of a gas engine heat pump provided with the engine type discriminating apparatus of the present invention is shown in FIG.
This will be described below. The outdoor unit 1 of the gas engine heat pump system includes a gas engine 1 for operating the system.
1, an outdoor control unit 2 for controlling the outdoor unit 1, and the like.

The outdoor control unit 2 includes a gas engine 1
The rotation signals detected from the camshaft 17 and the ring gear 12 are used for controlling the gas engine 11 such as air-fuel ratio control.
Gear rotation sensor 1 for detecting a rotation signal from the motor 2
4. A detecting means such as a camshaft rotation sensor 15 for detecting a rotation signal from the camshaft 17 and a crankshaft rotation sensor for detecting a rotation signal from the crankshaft are attached.

Various signals detected by these detecting means are input to the calculating means 4 through the counter circuit 6 in the outdoor control unit 2 and are processed by the calculating means 4. Then, according to the data processed by the calculating means 4, the spark plug 2 attached to the gas engine 11 is used.
1. The operation state of the gas engine 11 is controlled via a throttle actuator 22, a gas control valve 23, and the like.

In the gas engine heat pump system configured as described above, an engine type discriminating apparatus for automatically discriminating the model of the gas engine 11 and performing optimal operation control for the model will be described. The ring gear 12 of the gas engine 11 has a different number of teeth depending on the model of the gas engine 11. That is, the ring gear 12 has a unique number of teeth for each model of the gas engine 11.

The pulse signal detected during the constant rotation of the ring gear 12 has a value corresponding to the number of teeth of the ring gear 12. Then, this pulse signal is detected by the ring gear rotation sensor 14. Further, a pulse signal when the camshaft 17 of the gas engine 11 rotates is detected by the camshaft rotation sensor 15. Here, the rotation speeds of the ring gear 12 and the camshaft 17 have a correlation with each other. For example, if the ring gear 12 is attached to the crankshaft 18, the crankshaft 18 makes two rotations in the case of a four-stroke engine while the camshaft 17 makes one rotation. It rotates. Therefore, the pulse signal of the ring gear 12 detected during one rotation of the camshaft 17 has a value unique to each model in accordance with the number of teeth of the ring gear 12.

As shown in FIGS. 2 and 3, the camshaft 17 and the ring gear are formed by the camshaft 17 and the camshaft rotation sensor 15 and the ring gear 12 and the ring gear rotation sensor 14 configured as described above. 12 pulse signals are detected,
Ring gear 12 detected during one rotation of camshaft 17
Are counted by the counter circuit 6 of the outdoor control unit 2. That is, as shown in FIG.
The number of pulses of the ring gear 12, which is a value unique to each model of the gas engine 11 and is detected during the interval 26 from a certain pulse signal to the next pulse signal output from the controller, is counted.

Then, as shown in FIG. 5, the gas engine 11 is started, and the starter motor 13 in FIG.
N, the number of pulses of the ring gear 12 detected during one rotation of the camshaft 17 is compared with the number of teeth stored in the outdoor control unit 2 in advance. Is determined. Thereafter, an engine control program suitable for the determined engine model is selected and executed from among a plurality of engine control programs different for each model stored in the outdoor control unit 2 in advance, and the engine control of the gas engine 11 is performed. It is composed.

As described above, the pulse signals from the camshaft 17 of the gas engine 11 and the ring gear 12 are detected by the camshaft rotation sensor 15 and the ring gear rotation sensor 14, and the camshaft 17 makes one rotation. Ring gear 1
The type of the outdoor control unit 2 incorporating a plurality of types of engine control programs by automatically determining the type of the gas engine 11 based on the pulse signal of the second type and performing engine control suitable for the determined type. Can control a plurality of types of gas engines 11. Then, by automatically determining the engine model, the man-hour for setting the model can be reduced, and the occurrence of a setting error can be prevented.

Next, the engine cylinder number discriminating device is configured to detect and discriminate pulse signals of the camshaft 17 and the crankshaft 18. In FIG. 6, a camshaft rotation sensor 15 is provided on the outer peripheral portion of the camshaft 17,
A notch 31 is formed at one position on the outer periphery of one end of the camshaft 7.
5 is configured to detect the notch 31 as a pulse signal. That is, when the camshaft 17 makes one rotation, the camshaft rotation sensor 15 detects one pulse.

A crankshaft rotation sensor 16 is disposed on the outer periphery of the crankshaft 18. The number of cutouts 31 corresponding to the number of cylinders is formed on the outer periphery of one end of the crankshaft 18.
··························································································· When the crankshaft 18 rotates, the Has been detected. As described above, the rotation speed of the camshaft 17 and the rotation speed of the crankshaft 18 have a correlation with each other (in a four-cycle engine, two rotations of the crankshaft per rotation of the camshaft), so that the camshaft 17 makes one rotation. The pulse signals detected by the notches 31 in accordance with the number of cylinders of the crankshaft 18 between the engine cylinders have a unique value for each number of engine cylinders.

The camshaft rotation sensor 15 and the crankshaft rotation sensor 16 are connected to the outdoor control unit 2 which is an electronic control unit, and a pulse signal detected by the camshaft rotation sensor 15 shown in FIG. The pulse signal detected by the crankshaft rotation sensor 16 is input to the outdoor control unit 2.

As shown in FIGS. 2 and 7, the camshaft 17 and the crankshaft rotation sensor 15 and the crankshaft 18 and the crankshaft rotation sensor 16 are used to form the camshaft 17 and the crankshaft. The number of pulses, which is the number of pulse signals of the crankshaft 18 detected during one rotation of the camshaft 17, is counted by the counter circuit 6 of the outdoor control unit 2.
That is, as shown in FIG. 8, the crankshaft 17 is a value unique to each number of cylinders of the gas engine 11, which is detected in the detected camshaft 17 during a section 27 from a certain pulse signal to the next pulse signal. The number of pulses on the shaft 18 is counted.

Then, as shown in FIG. 9, the gas engine 11 is started, and the starter motor 13 in FIG.
N, the number of pulses of the crankshaft 18 detected during one rotation of the camshaft 17 is compared with the number of cylinders stored in the outdoor control unit 2 in advance. Is determined. Thereafter, an engine control program suitable for the determined number of cylinders is selected and executed from among a plurality of engine control programs stored in the outdoor control unit 2 in advance, and engine control of the gas engine 11 is performed. I have.

As described above, a pulse signal is detected by the camshaft rotation sensor 15 and the crankshaft rotation sensor 16 from the camshaft 17 and the crankshaft 18 of the gas engine 11, and the pulse signal Gas engine 1
By automatically discriminating the number of one cylinder and performing engine control suitable for the discriminated number of cylinders, one type of outdoor control unit 2 incorporating a plurality of control programs different for each number of cylinders differs. Gas engine 1 with the number of cylinders
1 can be controlled. By automatically determining the number of cylinders, the number of man-hours for setting the number of cylinders can be reduced, and the occurrence of a setting error can be prevented.

In the present embodiment, during operation, in order to automatically determine the model and the number of cylinders, a period of time during which the camshaft makes one rotation is used as a reference for detecting each unique value of the model and the number of cylinders for each engine. However, the reference time may be set to a period during which the crankshaft makes one rotation or two rotations. That is, the time that is correlated with the eigenvalue to be detected may be used as a reference. Further, as the pulse transmission means for discriminating the number of cylinders, notches are provided on the crankshaft according to the number of cylinders, but such notches may be provided on the camshaft. That is,
In the camshaft, both a reference time measuring unit and a cylinder number discriminating unit are provided.

[0025]

As described above, the present invention has the following advantages. That is, means for detecting a pulse signal peculiar to a gear having a different number of teeth for each engine model for a predetermined time during engine operation, means for storing the number of teeth in advance, The engine is provided with means for comparing the pulse signal thus obtained with the number of teeth stored in advance to determine the engine model, so that the engine model can be determined. A plurality of types of engines can be controlled by a single type of outdoor control unit incorporating. Then, by automatically determining the engine model, the man-hour for setting the model can be reduced.
Setting errors can be prevented.

Further, as described in claim 2, a unique pulse signal of a gear having a different number of teeth for each engine model is
Means for detecting during one revolution of the camshaft during engine operation, means for storing the number of teeth in advance, and comparing the detected pulse signal with the number of teeth stored in advance to determine the engine type The engine model can be determined by providing the engine with a means for performing the above operation. Therefore, the engine model can be automatically determined during the operation of the engine, and a plurality of engine control programs are incorporated. A single type of outdoor control unit can control a plurality of types of engines. Then, by automatically determining the engine model, the man-hour for setting the model can be reduced, and the occurrence of a setting error can be prevented.

Further, in the engine, means for transmitting a pulse signal peculiar to each number of cylinders in the engine, means for detecting the pulse signal for a certain period of time during engine operation, and storing the number of cylinders in advance A means for comparing the detected pulse signal with a previously stored number of cylinders to determine the number of engine cylinders is provided in the engine so that the number of engine cylinders can be determined. Therefore, it is possible to automatically determine the number of cylinders when the engine is operating, and to control an engine having a different number of cylinders with one type of outdoor control unit incorporating a plurality of control programs different for each number of cylinders. it can. And
By automatically determining the number of cylinders, the number of man-hours for setting the number of cylinders can be reduced, and a setting error can be prevented.

Further, in the engine, means for transmitting a pulse signal peculiar to each number of cylinders in the engine, means for detecting the pulse signal during one rotation of the camshaft during operation of the engine, and The engine is provided with means for storing the number of cylinders in advance and means for comparing the detected pulse signal with the stored number of cylinders to determine the number of engine cylinders. An engine having a different number of cylinders in one type of outdoor control unit incorporating a plurality of different control programs for each number of cylinders because the number of cylinders can be automatically determined during operation of the engine. Can be controlled. By automatically determining the number of cylinders, the number of man-hours for setting the number of cylinders can be reduced, and the occurrence of a setting error can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall view of a gas engine heat pump provided with an engine type discrimination device and a cylinder number discrimination device of the present invention.

FIG. 2 is a diagram illustrating a flowchart for counting pulse signals detected from a camshaft.

FIG. 3 is a diagram showing a flowchart for counting pulse signals detected from a ring gear.

FIG. 4 is a diagram showing the number of pulses of a ring gear detected during one revolution of a camshaft.

FIG. 5 is a diagram showing a flowchart in a case where engine control is performed based on a pulse signal detected from a ring gear.

FIG. 6 is a diagram showing an apparatus for detecting a pulse signal from a camshaft and a crankshaft.

FIG. 7 is a diagram showing a flowchart for counting pulse signals detected from a crankshaft.

FIG. 8 is a diagram showing the number of crankshaft pulses detected during one revolution of the camshaft.

FIG. 9 is a diagram showing a flowchart in a case where engine control is performed based on a pulse signal detected from a crankshaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Outdoor control unit 4 Computing means 6 Counter circuit 11 Gas engine 12 Ring gear 14 Ring gear rotation sensor 15 Cam shaft rotation sensor 16 Crank shaft rotation sensor 17 Cam shaft 18 Crank shaft 31/32 Notch

Claims (4)

[Claims] A means for detecting a pulse signal peculiar to a gear having a different number of teeth for each engine model for a predetermined time during operation of the engine; a means for storing the number of teeth in advance; a detected pulse signal; And a means for comparing the number of teeth with a previously stored number of teeth to determine an engine model. 2. A means for detecting a pulse signal unique to a gear having a different number of teeth for each engine model during one rotation of a camshaft during engine operation, and means for storing the number of teeth in advance. Means for comparing the detected pulse signal with a previously stored number of teeth to determine the engine type by providing the engine with a means for determining the engine type. Model identification device. 3. An engine for transmitting a pulse signal unique to each number of cylinders, a means for detecting the pulse signal for a predetermined time during engine operation, and a means for storing the number of cylinders in advance. Means for comparing the pulse signal and the number of cylinders stored in advance to determine the number of engine cylinders by providing the engine with a means for determining the number of engine cylinders. Number discriminator. 4. An engine for transmitting a pulse signal peculiar to each number of cylinders, a means for detecting the pulse signal during one revolution of a camshaft during engine operation, and storing the number of cylinders in advance. Means for comparing the detected pulse signal and the stored number of cylinders to determine the number of engine cylinders by providing the engine with
An engine cylinder number discriminating device characterized in that the number of engine cylinders can be discriminated.