CN210164561U

CN210164561U - Ignition drive module, ignition drive circuit and ignition control system

Info

Publication number: CN210164561U
Application number: CN201920821018.6U
Authority: CN
Inventors: 沈势业
Original assignee: Kunshan Cadic Auto Electric Parts Co Ltd
Current assignee: Kunshan Cadic Auto Electric Parts Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-03-20
Anticipated expiration: 2029-06-03

Abstract

The utility model provides an ignition driving module with stable performance and reliable function, which comprises a module signal input end, a voltage input end and a module signal output end, and comprises a comparator with one end connected with the module signal input end, the other end of the comparator is connected with a comparison resistor R, and the end of the comparison resistor R which is not connected with the comparator is grounded; the device also comprises a maximum residence time timing module connected with the comparator, a logic judgment module connected with the comparator and an IGBT module connected with the logic judgment module; the logic judgment module receives the signals of the maximum dwell time timing module and the comparator to judge whether to start the IGBT module, and the output end of the IGBT module is connected with the signal output end of the module.

Description

Ignition drive module, ignition drive circuit and ignition control system

Technical Field

The utility model relates to an ignition drive module.

Background

In the ignition system of the automobile engine, an ignition coil is an execution component for providing ignition energy for igniting air and fuel mixture in an engine cylinder, and is a special pulse booster based on the electromagnetic induction principle, and 8-16V low voltage is switched on and off according to a set frequency, so that the secondary stage of the special pulse booster generates 20-40KV voltage to generate electric spark through a spark plug. Due to the precise nature of ignition coils, ignition coils of different performance need to be matched with a special driving circuit to meet the requirements of functionality.

Disclosure of Invention

In order to overcome the defects existing in the prior art, the utility model aims to provide an ignition driving module with stable performance and reliable function.

In order to achieve the above object, the utility model provides an ignition driving module, which comprises a module signal input end, a voltage input end and a module signal output end, and comprises a comparator, wherein one end of the comparator is connected with the module signal input end, the other end of the comparator is connected with a comparison resistor R, and the other end of the comparison resistor R is grounded; the device also comprises a maximum residence time timing module connected with the comparator, a logic judgment module connected with the comparator and an IGBT module connected with the logic judgment module; the logic judgment module receives the signals of the maximum dwell time timing module and the comparator to judge whether to start the IGBT module, and the output end of the IGBT module is connected with the signal output end of the module.

Preferably, a peak filter is included connected to the output of the comparator, and the input with positive and negative peaks less than a predetermined time Ts is filtered by the peak filter.

Preferably, the system comprises a residence time input end, the residence time input end is connected with the maximum residence time timing module, and the maximum residence time can be changed by setting a residence time capacitor.

Preferably, the dwell time input terminal is a dwell time capacitor.

Preferably, a hard closing switch is arranged between the maximum staying time timing module and the staying time input end, one end of the hard closing switch is connected with the IGBT module, and when the hard closing switch is turned on, the IGBT module is turned off.

Preferably, the resistance value of the comparison resistor R is 450 ohms.

According to another aspect of the present invention, there is provided an ignition driving circuit, comprising the above ignition driving module, and a triode connected to the module signal output terminal; the base of the triode is connected with the signal output end of the module, and the collector of the triode is connected with an ignition coil.

Preferably, the emitter of the triode is grounded through a sensing resistor, the ignition driving module is provided with a sensing voltage input end, and the sensing voltage input end is connected to the emitter of the triode.

Preferably, the ignition coil comprises a primary coil and a secondary coil, one end of the primary coil is connected with the base of the triode, and the other end of the primary coil is connected with the voltage input end.

According to another aspect of the present invention, there is provided an ignition control system, comprising an ECU, including the ignition driving circuit as described above, wherein one port of the ECU is connected to the module signal input terminal, and the collector current of the IGBT module is connected to the other port of the ECU.

Owing to adopted above technical scheme, the utility model relates to a stable performance, the ignition drive module of reliable function.

Drawings

FIG. 1 is a block diagram of a circuit configuration of an ignition driver module;

FIG. 2 is a schematic diagram of a typical application of an ignition driver circuit;

FIG. 3 is a schematic diagram of an ignition driver module;

FIG. 4 is a schematic diagram of the relationship between dwell time and soft-off (SSD) of the ignition driver circuit;

FIG. 5 is a schematic diagram of the current signature output of the ignition driver circuit;

fig. 6 is a diagram of the CSSD capacitor of the ignition driver circuit versus maximum dwell time.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make more clear and definite definitions of the scope of the present invention.

Referring to fig. 1 and fig. 2, fig. 1 is a block diagram of a circuit structure of an ignition driver module, and fig. 2 is a schematic diagram of a typical application of the ignition driver circuit. An ignition control system with stable performance and reliable function comprises an ECU and an ignition driving circuit, wherein one port of the ECU is connected with a module signal input end, and a collector current of an IGBT module is connected with the other port of the ECU.

The ignition driving circuit comprises an ignition driving module and a triode connected with the signal output end of the module, the base of the triode is connected with the signal output end of the module, and the collector of the triode is connected with an ignition coil. The emitting stage of the triode is grounded through the sensing resistor, the ignition driving module is provided with a sensing voltage input end, and the sensing voltage input end is connected to the emitting stage of the triode. The ignition coil comprises a primary coil and a secondary coil, wherein one end of the primary coil is connected with the base electrode of the triode, and the other end of the primary coil is connected with the voltage input end.

The ignition driving module (CIM 2001) comprises a module signal input end, a voltage input end, a module signal output end, a comparator with one end connected with the module signal input end, a maximum retention time timing module connected with the comparator, a logic judgment module connected with the comparator and an IGBT module connected with the logic judgment module; the logic judgment module receives signals of the maximum residence time timing module and the comparator to judge whether the IGBT module is started, the output end of the IGBT module is connected with the signal output end of the module, the other end of the comparator is connected with a comparison resistor R, and the other end of the comparison resistor R is grounded.

The ignition driving module further comprises a peak value filter connected with the output end of the comparator, and the input with positive and negative peak values smaller than the preset time Ts is filtered by the peak value filter.

The ignition driving module further comprises a residence time input end, the residence time input end is connected with the maximum residence time timing module, the maximum residence time can be changed through setting of a residence time capacitor, the residence time input end is the residence time capacitor, a hard closing switch is arranged between the maximum residence time timing module and the residence time input end, one end of the hard closing switch is connected with the IGBT module, and when the hard closing switch is turned on, the IGBT module is turned off.

The ignition driver module (CIM 2001) is designed to directly drive the ignition IGBTs and control the current and spark events of the coils. The coil current is controlled via an input pin. When the single-ended input is driven high, the output of CIM2001 is enabled to turn on the IGBT and start charging the coil. The CIM2001 input pin is an internal pull down 450 ohms to ground. The method is characterized by comprising the following steps: single-ended input supporting ground mobile interference suppression; a signal line input buffer; an input peak filter; from ignition or battery line operation; ground offset tolerance: -1.5V to 16V; programmable maximum dwell time; outputting a current signal; controlling IGBT current limiting through a Vsense pin; maximum time to close after hard shutdown; meets the requirements of SOP-8 package and RoHS.

CIM2001 includes a maximum dwell timer that will turn off the IGBT if the input keep-alive time exceeds the programmed time. The input peak filter rejects single-ended input signals having a duration of less than 7 microseconds. This time interval can be modified by an external capacitor. When the maximum dwell time is exceeded, CIM2001 will enter Hard Shutdown (HSD) mode, immediately turning off the firing IGBT. CIM2001 will also limit the IGBT collector current to ic (lim) during charging. This is again accomplished by firing a sense resistor in the IGBT emitter lead that inputs a signal to the Vsense pin of CIM 2001. The collector current level is relayed to the ECU by a current signal output.

Referring to fig. 3, fig. 3 is a schematic diagram of an ignition driver module. CIM2001 is an advanced ignition IGBT control IC that can be used in SOP8 packaging or die sales. This fully functional intelligent ignition IGBT driver is particularly advantageous in "energized coil" applications where ignition driver size and system performance are important.

TABLE 1

Type remarks for PIN:

"P" represents a power pin;

"G" represents a ground pin. All the pins of the vehicle speed sensor are short-circuited through internal resistors;

"O", "I/O", "A" denote output only, input/output and analog types;

"PU" or "PD" denotes an internal pull-up or pull-down PIN leg.

Description of functions

1. Input and peak filter for single-ended input signal

When the input signal voltage reaches VInh, the IGBT will be turned on to charge the coil. When the input voltage is lower than VINL, the coil current through the IGBT will be turned off. Positive and negative peaks on the input line that are less than the tspike duration will be filtered out and will not turn the IGBT on/off.

2. Maximum dwell time and Hard Shutdown (HSD)

Referring to fig. 4, fig. 4 is a schematic diagram of the relationship between the dwell time and the soft-off (SSD) of the ignition driver circuit, when the IGBT is turned on, the delay timer is started according to the value of the external CSSD capacitor. If no valid falling edge is received after time tdmax, the IGBT will turn off immediately.

3. Current flag output

Referring to fig. 5 and 6, fig. 5 is a schematic diagram of the current signature output of the ignition driver circuit, and fig. 6 is a schematic diagram of the CSSD capacitor of the ignition driver circuit as a function of maximum dwell time. CIM2001 provides a flag feedback signal when the input signal is active. This is shown in the waveform example below. IGFH and IGFL are internally disposed at 5.8A and 2.6A sense resistances 18MOhm, respectively.

Electrical characteristics

1. Absolute maximum rating

Stresses that exceed the absolute maximum rating may damage the equipment. The device may not be able to operate or operate under the recommended operating conditions and it is not recommended to stress the part to these levels. Furthermore, prolonged exposure to stresses above the recommended operating conditions may affect the reliability of the device. The absolute maximum rating is only the stress rating.

TABLE 2

2. Electrical characteristics

TABLE 3

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to make the person skilled in the art understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention are covered in the protection scope of the present invention.

Claims

1. An ignition driver module comprising a module signal input, a voltage input and a module signal output, characterized in that: the module comprises a comparator, one end of the comparator is connected with the signal input end of the module, the other end of the comparator is connected with a comparison resistor R, and the other end of the comparison resistor R is grounded; the device also comprises a maximum residence time timing module connected with the comparator, a logic judgment module connected with the comparator and an IGBT module connected with the logic judgment module; the logic judgment module receives the signals of the maximum dwell time timing module and the comparator to judge whether to start the IGBT module, and the output end of the IGBT module is connected with the signal output end of the module.

2. The ignition driver module of claim 1, wherein: comprises a peak filter connected with the output end of the comparator, and the input with positive and negative peak values less than the preset time Ts is filtered by the peak filter.

3. The ignition driver module of claim 1, wherein: the system comprises a stay time input end, wherein the stay time input end is connected with the maximum stay time timing module, and the maximum stay time can be changed by setting a stay time capacitor.

4. The ignition driver module of claim 3, wherein: the input end of the staying time is a staying time capacitor.

5. The ignition driver module of claim 3, wherein: a hard closing switch is arranged between the maximum staying time timing module and the staying time input end, one end of the hard closing switch is connected with the IGBT module, and when the hard closing switch is turned on, the IGBT module is turned off.

6. The ignition driver module of claim 1, wherein: the resistance value of the comparison resistor R is 450 ohms.

7. An ignition drive circuit characterized by: comprising an ignition driver module according to any one of claims 1-6, a transistor connected to a signal output of said module; the base of the triode is connected with the signal output end of the module, and the collector of the triode is connected with an ignition coil.

8. The ignition drive circuit according to claim 7, characterized in that: the emitting stage of the triode is grounded through a sensing resistor, the ignition driving module is provided with a sensing voltage input end, and the sensing voltage input end is connected to the emitting stage of the triode.

9. The ignition drive circuit according to claim 7, characterized in that: the ignition coil comprises a primary coil and a secondary coil, wherein one end of the primary coil is connected with the base electrode of the triode, and the other end of the primary coil is connected with the voltage input end.

10. An ignition control system comprising an ECU, characterized in that: comprising an ignition driver circuit according to any one of claims 7-9, one of the ports of the ECU being connected to the module signal input, the collector current of the IGBT module being connected to the other port of the ECU.