SU830828A1 - Ignition system for internal combustion engine - Google Patents

Description

development, comprising a command generation unit connected in series, a calculator unit, a counter with a tag sensor connected thereto, and a power amplifier, a crankshaft speed sensor two, connected to the calculator unit and a counter, operation parameters sensors two, for example coolant temperature sensors, loads the positions of the throttle valve of the internal combustion engine, etc., connected to the calculating unit, the unit for determining the parameters of the operation of the internal combustion engine, made in the form of the unit for determining the speed range of the internal combustion engine, whose input It is connected to the engine speed sensor and the output is to the first input of the command generation unit, a stable frequency generator connected to the second input of the command generation unit, and a delay unit connected to the third console of the command generation unit, and the output of the counter is also connected to the fourth input of the command generation unit, and the second input of the command generation unit is connected to the input of the delay unit and the second input of the power amplifier. Due to this, the well-known ignition system for the internal combustion engine realizes the optimum characteristics of the engine operating conditions according to the parameters monitored, the moment of sparking is calculated and the moment of the start of energy accumulation in the ignition coil. The system is flexible and can be used for a serial engine, ensuring its optimum performance. A disadvantage of the known system is the impossibility of promptly changing the dependences of the ignition advance angle on the engine operation parameters, the change of which is related to the engine operation. In this case, it is necessary to determine the modified parameters of the engine operation and the soldering of the command generation unit, which is impossible to save even on technical services, because it requires complex, expensive equipment. commonly used in serial plants. The purpose of the invention is to improve the accuracy and promptness of the system settings. The goal is achieved by the fact that the ignition system for an internal combustion engine comprising a command generation unit connected in series, a calculation unit, a counter with a tag sensor connected to it and an MOLHHOCTH amplifier, an operation parameter detection unit, operation parameters sensors, for example, crankshaft rotation speed, coolant temperature, load, throttle position, connected to the computing and determining parameters of operation, stable frequency generator connected to the first input b eye generate commands and a delay unit. connected to the second input of the command generation unit, the counter output being connected to the third input of the command generating unit, the second output of which is connected to the input of the delay unit and the second input of the power amplifier, a random access memory unit is inserted, one input of which is connected to the output of the operation parameter determining unit, the other to the third output of the command generation unit, and the output to the fourth input of the command generation unit; the control unit is connected to the third input of the operational memory unit; the trials. For a four-cylinder internal combustion engine, the system completely contains two counters and a second power amplifier, the first additional counter having two inputs to which the counter and the rotational speed of the engine crankshaft are connected, an output connected to the input of the additional power amplifier, the second additional counter also has two inputs to which the command generation unit and the rotational speed sensor of the crankshaft of the internal combustion engine are connected, and an output connected to another input of the auxiliary power amplifier. FIG. 1 is a block diagram of an ignition system for internal combustion engines; on fng. 2 is a block diagram of a system, ignition for a four-cylinder internal combustion engine; in fig. 3 menn diagram of the system. The ignition system for an internal combustion engine contains a command generation unit 1 having four inputs to which a generator of stable frequency 1 is connected, an operative storage unit 3, a counter 4 and a delay unit 5, and four outputs, the first of which is connected to the third. the input of the delay unit 5 to the input of the amplifier is b); tags 1 0, connected to the counter 4. sensor II speed of warhead crankshaft. a temperature sensor 12, a load sensor 13 and a throttle position sensor 14. Sensors 11-14 are each connected to blocks 7 and 8, and sensor 11, in addition, is connected to counter 4. Preparation of the system for operation begins C and starts by entering into it specified characteristics, individually 1x for each engine. The system works as follows. The command to the power amplifier 6 about the moment of sparking comes from the command generation unit 1. The same signal goes to the input of the com:: 1 output unit through the delay unit 5, after which the system returns to its original position

to start a new calculation cycle. The command generation unit 1, the specified accuracy of which is provided by the generator 2 at a stable frequency, after a signal from the delay unit 5, generates a signal for the operation parameter determination unit 8, which, according to the information, is continuously received from the sensor 11 of the rotational speed of the crankshaft The internal combustion engine, the coolant temperature sensor 12, the load sensor 13, and the throttle position sensor 14 determine the ranges of the operation parameters of the internal combustion engine, and the codes corresponding to these ranges are transmitted to the input of block 3, you ira thus cell block address 3 for reproducing recorded therein by the control unit 9 information. According to signals from the command generation unit 1, unit 3 reproduces this information and transmits this information back to command generation unit 1, which generates signals at its outputs, the durations of which are determined by the dependences of the angle of advance of the sparking moment on the operating parameters of the internal combustion engine.

Information about the operation parameters of the internal combustion engine enters the system in the form of frequency signals from all sensors.

For example, let it be required to realize a linear dependence of the ignition advance angle (8) on the angular velocity (ω) 0 K.CO. Since E co-t, then m K. Therefore, the angle of advance of the moment of x-formation will be equal to

fixed pulses with a frequency

2l

baths for the time t, formed in this case by the command generation unit 1. Similarly, the dependences of the ignition advance angle on other parameters are implemented

two.

FIG. 3 shows a temporary diagram of the system. After the moment of the previous sparking, indicated in FIG. 3 asterisk (), the delay unit 5 forms the delay time tsZemly the calculating unit 7, taking into account the true values of speed, temperature, load and throttle position determined continuously by the sensors 11-14, generates the number of pulses corresponding to the forward angle of the spark moment N8 and the time of energy accumulation in the ignition coil M „. The calculation unit 7 transmits this information to the counter 4, which counts the pulses proportional to the sum of the angles N in and N ,, for the time t Ne and t, pl. After that, counter 4 stops counting before the signal arrives from the sensor mark set here in the bottom dead center (BDC), when the signal from the sensor 10 mark counter 4 counter 4 arrives at counter 4 at a speed determined by the engine speed sensor 11, continues counting pulses proportional to the angle (180 ° - Kb-N ,,) during the time t180 ° -Ne-N ,,.

Then, the counter 4 transmits the spgnal to the power amplifier 6 about the beginning of the accumulation of energy in the ignition coil during the time t-v.

After accumulation of energy in the ignition coil, the command generation unit 1 transmits to the power amplifier 6 a command about 0 moment of sparking. The same signal through the delay unit 5 is fed to the input of the command generation unit 1 to start a new calculation cycle.

Thus, the ignition system for internal combustion engines realizes the optimum characteristics of the operating modes of the internal combustion engine, which are individual for each engine, which improves the accuracy of system tuning and provides the highest efficiency of operation of internal combustion engines with a zero content of carbon monoxide, nitrogen oxide and hydrocarbons in the exhaust gases.

During operation, the engines change its speed, load and adjustment characteristics. There is a need to adjust the initial specified characteristics of the engine. Operational adjustment of the system, which involves altering the contents of unit 3, in this case is carried out by the operator using switches mounted on the control unit 9, similar to preparing the system for operation, but without stopping the engine.

Work system for the new modified

5, the characteristics begin no later than one turn of the engine crankshaft after the operator commands the operator.

The ignition system for the four-cylinder internal combustion engine (Fig. 2) additionally contains a counter 15 having two inputs to which the counter 4 and the engine speed sensor 11 are connected. The output of the counter 15 is connected to the input of the power amplifier 16. The counter 17 has two inputs to which the command generation unit 1 and the speed sensor 11 of the rotational crankshaft of the internal combustion engine are connected. The output of the counter 17 is connected to another

0 to the input of the power amplifier 16. The four-cylinder internal combustion engine cycle occurs after two revolutions of the crankshaft, therefore, spark formation in one of the internal combustion engine cylinders should occur for every half of its revolution. To this end, after the counting of the counter 4, the signal from its output enters the 6 n power amplifier simultaneously at the input of the counter 15, with the arrival of this signal, the counter 15 starts counting pulses with a speed determined by the sensor AND of the rotational speed of the crankshaft of the internal combustion engine to the number corresponding to crankshaft rotation angle two 180 °. After the end of the counting 65, the counter 15 transmits a signal to the amplifier

power 16 on the beginning of accumulation of the unergin in the ignition coil.

The output from the output of the command generation unit 1, the postunayun-ix to the input of the power amplifier 6, is swiftly switched to the input of the counter 17, with this signal the counter 17 starts counting the emulsions with the speed determined by the sensor 11 of the rotational speed of the crankshaft of the engine to the corresponding angle of rotation of the cranked engine 180 °. After the end of the counting, the counter 17 transmits a command about the moment of sparking to another input of the timenail 16.

Achieving high accuracy and reducing, as a minimum, by the way, the tuning time of the system leads to an increase in the efficiency of engine propulsion by operatively removing the characteristics

two.I

The implementation of complex dependencies of the moment sparking on speed, load, temperature, throttle position and other performance parameters two allows to reduce fuel consumption by 8-10% and} reduce the toxicity of exhaust gases.

The proposed ignition system for internal combustion engines can also be used in the factory as a tool for investigating ignition processes in two, in particular, to determine the optimum angles of ahead of ignition in the variance of operation parameters: speed, load, temperature, etc.

Claims (3)

1. An ignition system for an internal combustion engine (ICE) containing a comaid generation unit connected in series, a calculation unit, a counter with a tag sensor connected to it, and an AMP amplifier, a unit for determining operation parameters, operating parameter sensors, for example, vp1 speed sensors, epi shaft clearance, coolant temperature, load, throttle position, connected to the blocks calculated and determine performance parameters, stable frequency generator, but not connected to the nerve input b command generation locale, and a delay unit connected to the second input of the command generation unit, the counter output not connected to the third input of the command generation unit, the second output of which is connected to the input of the delay unit and the second) to the input of the power amplifier, which differs from the fact that, for the purpose of determining the accuracy and operability of the setting, a block of an operative storage device, one input of which is connected, is entered into it to the output of the operation parameter determination unit, another input to the third output of the command generation unit, and the output to the fourth) input of the command generation unit, the control unit is connected to the third the inlet of the operative surgeon device. 2. System no. 1, characterized in that for a four-cylinder internal combustion engine it contains a total of two counters and The second power unit, the first additional meter has two inputs to which the counter and the engine speed sensor are connected, and the output connected to the input of the additional power amplifier, the second additional meter also has two inputs to which the command generation unit is connected and the sensor rotational speed of the crankshaft of the internal combustion engine, and the output connected to the other input of the additional power amplifier. Sources of ppforma accepted in the course of examination 1. The patent of Germany LU 2339755, cl. F 02 P 5/08, 1975. 2. The role of special electronic devices for research in the field of automotive electronics. Proceedings of the Symposium on Automotive Elektfix, Paris, 1978. 3. Authors svidete.tstvo USSR but for application LJ 2597731/06, 28.03.78. R ZMT