JPS63219833A - Electronic governor in internal combustion engine - Google Patents

Abstract

PURPOSE:To aim at improvement in revolution control accuracy, by installing an encode rotor and a pickup, sampling a crank angle each phase difference signal, both in a distributor. CONSTITUTION:An encode rotor 15 is installed in a shaft 14 of a distributor 8, and a pickup 16, sampling a crank angle each phase difference signal being opposed to this encode rotor 15, is installed in a distributor body 81. With this constitution, measuring periodic error of a crank angle sensor is eliminated, thus revolution control accuracy is improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electronic governor that controls the engine rotation by controlling a carburetor in an internal combustion engine having a speed regulating function.

[Conventional technology]

Conventionally, it has been known that engine rotation is controlled by operating an actuator with a controller to adjust the opening of the throttle valve of the vaporizer 1. For example, as shown in FIG. The operation of
It is a device that can be remotely controlled electrically via an electronic control unit 3 and an actuator 4.The electronic control unit 3 has a speed regulating control function and stores the optimal ignition timing according to the engine condition in advance and uses a signal from a sensor. This is an electronic governor that sends the optimal ignition timing that matches the engine condition to the ignition coil, and has a speed control function.

[Problem that the invention seeks to solve]

However, in such conventional control devices,
A periodic signal that is inversely proportional to the engine speed is picked up, and the engine speed and rotational acceleration are calculated by the electronic control unit of the ignition timing determining device and fed back to the actuator, so that all carburetor throttle operations are controlled electronically. Therefore, there is a possibility that the pickup signal is used at the timing rotor for detecting the crank angle reference position, and there is a manufactured angle θ1 that has an error with respect to the rotor angle of the design value θ', and the period calculation of the electronic control unit is θ'. 1 is assumed, so an error occurs. That is, the mechanical angles θ1 to θ4 are each θ7, and the circumference is 81'
If r s, 0 occurs, for example, N, 1 = 330 Or, p, +s TA = 6.061
msTs = IMHz 01'-〇, = 2° tossle, and when actual Nn = 330Or, p, ta, θ, =
If it is manufactured with θ, '+2, 319Or, ρ, +w will be input. Therefore, the actuator control amount is F
If (N,,)-Cox f (Nn), an output error occurs and stability is lost, which has the drawback that the safety of the operation of the internal combustion engine cannot be ensured.

The present invention aims to eliminate these conventional drawbacks, and aims to provide a highly reliable electronic governor that has no internal combustion engine output error, maintains stable operation control, and greatly improves operability. It is said that

[Means for solving problems]

According to the present invention, pick-up signals from an engine rotation sensor, a throttle valve opening sensor, and a valve opening detection switch are respectively input into an electronic control unit of an ignition timing determining device, and are operated. In an electronic governor that operates a drive actuator to control the speed of an internal combustion engine, an encode rotor is provided on the shaft of a distributor that is driven by speed control by obtaining power from the rotation of the engine, and the encode rotor adjusts the phase difference of each crank angle. An electronic governor for an internal combustion engine is characterized in that a pickup for sampling signals is provided in a distributor body to eliminate measurement cycle errors.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS. 1 to 4. The throttle valve 2 of the carburetor 1 is opened and closed by an actuator 4 controlled by an electronic control unit 3 via a valve shaft 5. The actuator output shaft 4I and the valve shaft 5 are connected by a universal joint 6,
A signal is transmitted to the electronic control unit 3 by the valve opening detection switch 7 operated by pressing the valve stem 5, and the origin setting of the actuator 4 is performed.The valve stem 5 at the other end is equipped with a throttle lever 9 and a universal joint lO. The valve opening sensor 11 is connected to the valve opening sensor 11 via the valve opening sensor 11, and the output signal of the valve opening sensor 11 is set to enter the electronic control unit 3. That is, in order to detect the input angle of the throttle, the depression angle is converted into a voltage value using a potentiometer, and the A/D converter (
(not shown). The electronic control unit 3 receives the rotational speed signal from the engine rotation sensor 12 and calculates it with the valve opening signal, and uses the output signal to control the engine stop circuit 13 in addition to the drive circuit for the actuator 4. It looks like this.

The ignition timing determining device ECU including the electronic control unit 3 is an ignition advance adjuster, and an encode rotor I5 is provided on the shaft 14 of the distributor 8, which is driven to control the speed by obtaining power from the rotation of the engine. A pickup 16 for sampling each crank angle phase difference signal is provided in the distributor body 8I and is connected to an electronic governor configured to eliminate measurement cycle errors.

Note that the shaft 14 is provided with a distributor driving gear 17, and the gear 1 on the camshaft 18 is connected via the gear 17 for driving the distributor.
The encoder rotor 15 has a plurality of arms protruding radially from the outer end portions 15. is bent and arranged close to the inner peripheral surface of the distributor body 8, and the excitation type big amplifier of the pickup 16 generates a 360 degree signal period θ1°θ from the continuous periodic signal from the rotor.
2. θ1. θ4 and its respective phase difference signals are picked up as input values ($C+1), ($C+3).

($C+5) and ($C+7) are stored in the electronic control unit 3. Further, the electronic control unit 3 is equipped with a RAM, and stores the manual force value r in accordance with the rotor arrangement order of the software in the cycle value memory for each loaf, which is preset in the RAM as shown in FIG. For example, each arm of the rotor 15 is configured to use software to assign the rotor magnet number theft at the beginning of the rotor rotation operation so that it functions as the input value in Table 1 as shown in Table 1.

In any case, it is considered to be equipped so that the ring gear section sensor signal, the distributor IGN pulse signal, and the crank pulley device sensor signal can be extracted as signals corresponding to the engine rotation speed.

〔Effect of the invention〕

The present invention provides an encoding rotor on the shaft of a distributor that is driven by speed control by obtaining power from the rotation of the engine, and a pink amplifier that samples each crank angle phase difference signal on the encoder body. By configuring the structure to eliminate errors, pickup signals can be obtained.Measurement cycle errors (360" electrical angle) caused by angle errors of multiple rotors are eliminated, output errors are eliminated, and stable operation is possible, as well as the number of rotor divisions. By arbitrarily dividing the rotational angular acceleration into n, it is possible for the electronic control unit to calculate the rotational angular acceleration at a fast sampling interval, which provides feedback to the actuator, ensuring stable operation control, and also improves operability. This makes it possible to perform highly reliable operation control without any problems.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of the distributor, Fig. 2 is a front view taken along the line 2 in Fig. 1, Fig. 3 is an explanatory diagram of the system, Fig. 4 is a flow diagram of counter input, and Fig. 5 is the conventional system. It is an explanatory diagram. DESCRIPTION OF SYMBOLS 1... Carburetor, 2... Throttle valve, 3... Electronic control unit, 4... Actuator, 5...
... Valve stem, 6... Universal joint, 7... Valve opening detection switch, 8... Distributor, 9... Throttle lever, 10... Universal joint, 11... Valve opening sensor , 12... Engine rotation sensor, 13... Engine stop circuit, 14... Shaft, 15... Encode rotor, 16... Pickup, 17... Gear, 18
...Camshaft, 19...Gear.

Claims (4)

[Claims] (1) Pick-up signals from the engine rotation sensor, throttle valve opening sensor, and valve opening detection switch are input into the electronic control unit of the ignition timing determining device for calculation, and are connected to the valve shaft of the throttle valve. In an electronic governor that operates a drive actuator to control the speed of an internal combustion engine, an encode rotor is provided on the shaft of a distributor that is driven by speed control by obtaining power from the rotation of the engine, and a phase difference signal for each crank angle is sent to the encode rotor. An electronic governor for an internal combustion engine, characterized in that a pickup for sampling is provided in a distributor body to eliminate measurement cycle errors. (2) The electronic governor according to claim 1, wherein the encode rotor has a plurality of arms protruding radially, and outer ends of the arms are disposed close to the inner peripheral surface of the distributor body. (3) The pickup is an excitation type pickup, and stores a 360-degree signal period from a continuous periodic signal from the rotor and each of its phase difference signals as input values in an electronic control unit. The electronic governor according to scope 1 or 2. (4) The electronic control unit is equipped with a RAM, and stores input values in a cycle value memory for each rotor that is preset in the RAM in accordance with the rotor arrangement order of the software. Claims 1-
An electronic governor described in any one of Section 3.