RU2099583C1 - Automatic ignition corrector - Google Patents

Abstract

FIELD: engine engineering. SUBSTANCE: automatic ignition corrector has detonation pickups, detonation discriminator, and phase converter. The corrector is also provided with a timer, which measures a time period for which an engine operates in partial-load conditions and changes the advance angle by a given value when detonation occurs. The automatic ignition corrector can be added to the contactless ignition system of a car. EFFECT: enhanced reliability. 2 dwg

Description

 The invention relates to engine building and can be used in the ignition system (SZ) of an internal combustion engine of a car for automatic correction of the ignition timing (UOZ).

 With the forced use of low-contact fuel, detonation combustion can occur in the ICE cylinders, which reduces the durability and reliability of the ICE. The most effective way of anti-knock control of internal combustion engines is the correction of delay in the direction of delay (Gutsayt L.E. Yusim TL Means for suppressing detonation in internal combustion engines. Automotive Industry, 1989, N 11, p. 18.). The devices performing the correction function of the SPD can be divided into devices with manual and automatic correction of the SPD.

 The disadvantage of devices with manual correction of the UOZ is the distraction of the driver while the car is moving.

 The disadvantage of most automatic corrective devices for detonation detonation detonators is their complexity, which affects the reliability of the NW and the cost of the car.

 The prototype is an automatic engine ignition corrector, Japanese application No. 2 20830. The corrector contains: a knock sensor, a knock discriminator, and a phase converter consisting of a phase-shifting device and a delay angle adjuster. The delay angle regulator is equipped with a control circuit for the discrete measurement of the delay angle, which, when detonation is detected during the control number of cycles after the initial detonation is detected, increases the delay variation discrete.

 The disadvantages of the device is its complexity and inertia, due to which the internal combustion engine is allowed to operate in detonation mode for a control number of cycles.

 The task of the invention is to reduce the inertia of the device, as well as improving the reliability of the device by simplifying the circuit design.

 The solution to the problem is achieved by the fact that the automatic ignition corrector, comprising a knock sensor, a detonation discriminator and a phase converter, is equipped with a timer for operating the internal combustion engine in light mode, the input of which is connected to the detonation discriminator output, the output is connected to the input of the phase converter, and the phase converter consists of a phase shifter devices and matching schemes.

 In FIG. 1 shows a block diagram of an automatic Voinov ignition corrector. In FIG. 2 shows an embodiment of an internal combustion engine ignition system comprising an Voinov automatic ignition corrector.

 The automatic corrector (Fig. 1) includes the following devices: knock sensor 1, knock discriminator 2, phase converter 3, consisting of a phase shifting device 4 and matching circuit 5, and the internal combustion engine operation timer 6 in light mode 6.

 An automatic corrector can be implemented using the following elements. As a knock sensor, a resonance type sensor can be used, for example, GT-300 manufactured by the Ural Electromechanical Plant. The detonation discriminator 2 can be made in the form of a shaper on transistor 7 with a threshold device in the form of a divider on resistors 8 and 9. The timer 6 can be made on element 10 ZI-NOT, included in the single-oscillator circuit, with a timing RC-circuit 11 and 12 and an electronic key on transistors 13 and 14. The phase shifting device 4 can be made in the form of an RC chain 15 and 16.

 The device operates as follows.

 The signal from the ignition distributor sensor 17 is fed through an inverter 18 to one of the inputs of the matching circuit 5, to the second input of which an RC chain 15, 16 is connected.

 In the absence of detonation, the sensor signal of the ignition distributor, without undergoing changes in duration, is fed through a phase converter to the input of the switch 20 BSZ.

 At the first “click” of the knock, the signal from the knock sensor through the driver on the transistor 7 is fed to the input of the integral timer 10, which is triggered by a trailing edge. At the output of the timer, a high level appears, which is inverted by the inverter 19. A logical zero signal appearing at the output of the inverter 19 locks the transistor 13 for the time specified by the RC circuit 11, 12. A closed transistor allows the operation of the transistor 14, which includes the RC circuit 15, 16. At the output of matching circuit 5, ignition pulses with a shifted trailing edge are formed.

 After the time determined by the RC chain 11, 12, the circuit returns to its original state.

 The Voinov automatic corrector was tested by the author on a VAZ-2104 vehicle equipped with a contactless ignition system (BSZ), which includes an ignition distributor with a Hall sensor of type 40. 3706 and an electronic switch of type 3620. 374. The corrector was connected to the cable break connecting the switch with hall sensor. The +8.2 V supply voltage of the corrector was supplied from the terminal 5 of the switch (it corresponds to the supply voltage of the Hall sensor former).

 The automatic corrector reliably prevented the development of detonation in the internal combustion engine for all commercially available fuels.

 The experimentally established optimal time for putting the ICE into the light mode for the rear-wheel drive VAZ car was 1 1.5 s with a shift time of the trailing edge of the ignition pulse by 0.5 1 millisecond.

 The advantages of this scheme are its simplicity, reliability and versatility of the used elemental base.

 The automatic Voinov corrector can be installed as an addition to the standard BSZ vehicle.

Claims (1)

 Voinov’s automatic ignition corrector, which includes a knock sensor, a knock discriminator, and a phase converter, characterized in that it is equipped with a timer for operating the internal combustion engine in light mode, the timer input being connected to the detonation discriminator output, the timer output connected to the phase converter input, and the phase converter consists of a phase shifting device and a matching circuit.

Images