CN210118220U

CN210118220U - Intelligent ignition driving module, circuit and control system

Info

Publication number: CN210118220U
Application number: CN201920820975.7U
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: 2020-02-28
Anticipated expiration: 2029-06-03

Abstract

The utility model provides an intelligent ignition driving module with stable performance and reliable function, which comprises a module signal input end and a module signal output end, and comprises a comparator connected with the module signal input end, a maximum dwell time timing module connected with the comparator, a logic judgment module connected with the comparator, and an insulated gate bipolar transistor 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 insulated gate bipolar transistor is started or not, the output end of the insulated gate bipolar transistor is connected with the signal output end of the module, the signal input end of the module comprises a high-voltage input end and a low-voltage input end, the high-voltage input end and the low-voltage input end are respectively connected with the comparator, and the comparator is further connected with a comparison resistor in parallel.

Description

Intelligent ignition driving module, circuit and control system

Technical Field

The utility model relates to an intelligence 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 intelligent ignition driving module with stable performance and reliable function.

In order to achieve the above object, the utility model provides an intelligent ignition driving module, which comprises a module signal input end and a module signal output end, and comprises a comparator connected with the module signal input end, a maximum dwell time timing module connected with the comparator, a logic judgment module connected with the comparator, and an insulated gate bipolar transistor 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 insulated gate bipolar transistor is started or not, the output end of the insulated gate bipolar transistor is connected with the signal output end of the module, the signal input end of the module comprises a high-voltage input end and a low-voltage input end, the high-voltage input end and the low-voltage input end are respectively connected with the comparator, and the comparator is further connected with a comparison resistor in parallel.

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 insulated gate bipolar transistor, and when the hard closing switch is turned on, the insulated gate bipolar transistor is turned off.

According to another aspect of the present invention, an intelligent ignition driving circuit is provided, which comprises the above-mentioned intelligent 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 intelligent 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 the utility model discloses an on the other hand provides an intelligence ignition drive system, including ECU, including as above intelligence ignition drive circuit, ECU form two way output signal and respectively with intelligence ignition drive module's high voltage input and low voltage input be connected.

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

Drawings

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

FIG. 2 is a schematic diagram of a typical application of the intelligent ignition driving circuit;

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

FIG. 4 is a schematic diagram of the relationship between the residence time and the Soft Shutdown (SSD) of the intelligent ignition driving circuit;

fig. 5 is a diagram of the CSSD capacitor of the smart 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 intelligent ignition driving module, and fig. 2 is a schematic diagram of a typical application of the intelligent ignition driving module. The ignition control system comprises an ECU (electronic control unit) and an intelligent ignition driving circuit, wherein the ECU forms two paths of output signals and is respectively connected with a high-voltage input end and a low-voltage input end of an intelligent ignition driving module.

The intelligent ignition driving circuit comprises an intelligent ignition driving module and a triode connected with a module signal output end, wherein the base of the triode is connected with the module signal output end, and the collector of the triode is connected with an ignition coil. The emitter of triode passes through sensing resistance ground connection, and intelligent ignition drive module is provided with the sensing voltage input end, and the sensing voltage input end is connected in the emitter of 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 intelligent ignition driving module (CIM 2002) comprises a module signal input end, a voltage input end, a module signal output end, a comparator 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 insulated gate bipolar transistor 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 insulated gate bipolar transistor is started or not, the output end of the insulated gate bipolar transistor is connected with the signal output end of the module, the signal input end of the module comprises a high-voltage input end and a low-voltage input end, the high-voltage input end and the low-voltage input end are respectively connected with the comparator, and the comparator is further connected with a comparison resistor in parallel.

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

The intelligent 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 insulated gate bipolar transistor, and when the hard closing switch is turned on, the insulated gate bipolar transistor is turned off.

CIM2002 is designed to directly drive the firing IGBT, control the current and spark events of the coil. The coil current is controlled via an input pin. When the differential input is driven high, the output of the CIM2002 is enabled to turn on the IGBT and start charging the coil. CIM2002 is specific to differential input design solutions. The method is characterized by comprising the following steps: differential or single-ended input is supported to suppress ground mobile interference; a signal line input buffer; an input peak filter; from ignition or battery line operation; ground offset tolerance: -5V to 18V; programmable maximum dwell time; controlling IGBT current limiting through a Vsense pin; hard shutdown after the maximum dwell time is over; meets the requirements of SOP-8 package and RoHS.

The CIM2002 contains a maximum dwell time 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. CIM2002 will also limit the IGBT's 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.

Referring to fig. 3, fig. 3 is a schematic diagram of the intelligent ignition driver module. CIM2002 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 differential input signal

When the differential input signal voltage between the INH and INL pins reaches VINHD, the IGBT will be turned on to charge the coil. When the differential input voltage is lower than VINLD, 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 and 5, fig. 4 is a schematic diagram of a relationship between a residence time and a Soft Shutdown (SSD) of the intelligent ignition driving circuit, and fig. 5 is a schematic diagram of a relationship between a CSSD capacitor of the intelligent ignition driving circuit and a maximum residence time. When the IGBT is turned on, a 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.

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. The utility model provides an intelligence ignition drive module, includes module signal input part and module signal output part, its characterized in that: the device comprises a comparator connected with a module signal input end, a maximum retention time timing module connected with the comparator, a logic judgment module connected with the comparator, and an insulated gate bipolar transistor 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 insulated gate bipolar transistor is started or not, the output end of the insulated gate bipolar transistor is connected with the signal output end of the module, the signal input end of the module comprises a high-voltage input end and a low-voltage input end, the high-voltage input end and the low-voltage input end are respectively connected with the comparator, and the comparator is further connected with a comparison resistor in parallel.

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

5. The smart ignition driver module of claim 3, wherein: and 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 insulated gate bipolar transistor, and when the hard closing switch is opened, the insulated gate bipolar transistor is closed.

6. An intelligent ignition drive circuit, characterized by: the intelligent ignition driving module comprises the intelligent ignition driving module as claimed in any one of claims 1 to 5, and a triode connected with a module signal output end; 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.

7. The intelligent ignition drive circuit of claim 6, wherein: the emitting stage of the triode is grounded through a sensing resistor, the intelligent 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.

8. The intelligent ignition drive circuit of claim 6, wherein: 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.

9. An intelligent ignition driving system, comprising an ECU, characterized in that: the intelligent ignition driving circuit comprises the intelligent ignition driving circuit as claimed in any one of claims 6 to 8, wherein the ECU forms two output signals and is respectively connected with a high voltage input end and a low voltage input end of the intelligent ignition driving module.