CN203420815U - Prototype controller for high pressure common rail diesel engine - Google Patents
Prototype controller for high pressure common rail diesel engine Download PDFInfo
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- CN203420815U CN203420815U CN201320448912.6U CN201320448912U CN203420815U CN 203420815 U CN203420815 U CN 203420815U CN 201320448912 U CN201320448912 U CN 201320448912U CN 203420815 U CN203420815 U CN 203420815U
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- 239000000446 fuel Substances 0.000 claims description 17
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- 238000003745 diagnosis Methods 0.000 claims description 11
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Abstract
The utility model discloses a prototype controller for a high pressure common rail diesel engine. The prototype controller comprises a main control chip, a power module, a switching quantity processing module, an analog quantity processing module, a Hall signal processing module, a magneto-electric signal processing module, a communication module, a high end switch driver module, a relay low end switch driver module, a low end switch driver module and an oil injection control module. The main control chip is connected with the power module, the switching quantity processing module, the analog quantity processing module, the Hall signal processing module, the magneto-electric signal processing module, the communication module, the high end switch driver module, the relay low end switch driver module, the low end switch driver module and the oil injection control module respectively. The prototype controller for the high pressure common rail diesel engine has the advantages of being high in universality, extensible and the like, and can be used for developing a high pressure common rail electric control system, supporting hardware in a loopback test, a bench testing and a field test, and shortening the distance from the prototype controller to a controller of products developed by a finished automobile plant.
Description
Technical Field
The utility model relates to an automobile control field especially relates to a prototype controller for high pressure common rail diesel engine.
Background
With the global energy crisis becoming the focus of internal combustion engine industry worldwide, diesel engines are becoming more and more popular with users. Diesel engines have many advantages over gasoline engines: the exhaust emission of CO2 can be reduced by 20-25%, the acceleration performance is more advantageous when the vehicle speed is lower, the average fuel consumption is reduced by 25-30%, and more driving pleasure can be provided. However, noise and emission control have been two of the dominant factors in diesel engines as compared to gasoline engines. In order to meet emission standards and reduce noise, the advanced fuel injection system of diesel engines, i.e., high pressure common rail technology, is the focus of attention of those in the art.
At present, the application of the Common Rail (Common Rail) electronic injection technology is very Common, and partial universities, research institutes and enterprises in China also obtain distinctive research results through cooperative or independent research and development. In the development process of a control device of an electric control high-pressure common rail system, a V-mode development process is generally used, a mature prototype controller is generally used for verifying a control algorithm of a user, and the control algorithm verified by the prototype controller is transplanted to a product controller in the later stage of project development, so that batch production is realized.
The prototype controller in the prior art has an MCU with very strong processing capability and very abundant hardware interface resources, can meet the requirements of most controllers in the field of automobiles, but has very obvious defects, such as no driving capability and the like, and must be used together with a matched driving device; the processing capacity of the MCU of the prototype controller is greatly different from that of the MCU used in the automobile product controller, and no way is provided for checking the load capacity and the real-time performance of the final product controller on the control algorithms in the prototype stage; due to wide universality, a driving circuit of the original controller is not designed in a targeted manner aiming at the field of the high-voltage common rail, and has a great difference with a final product controller; although the functions of the software and the hardware are complete, the configuration is relatively complex, and the software and the hardware are not suitable for general users.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prototype controller for high pressure common rail diesel engine just can pay close attention to and examine ultimate product controller to control algorithm's load capacity at prototype control phase.
In order to achieve the above object, the utility model provides a following scheme:
a prototype controller for a high pressure common rail diesel engine, comprising: the device comprises a main control chip, a power supply module, a switching value processing module, an analog value processing module, a Hall signal processing module, a magnetoelectric signal processing module, a communication module, a high-end switch driving module, a relay low-end switch driving module, a low-end switch driving module and an oil injection control module; the main control chip is respectively connected with the power supply module, the switching value processing module, the analog value processing module, the Hall signal processing module, the magnetoelectric signal processing module, the communication module, the high-end switch driving module, the relay low-end switch driving module, the low-end switch driving module and the oil injection control module.
Further, the master control chip is an MPC 5554.
Further, the power supply module includes: and 4-path 5-volt output sensor power supply.
Further, the analog input module comprises: the system comprises 1 controller on-chip temperature detection channel, 8 power supply voltage acquisition channels, 5 driving diagnosis channels and 26 resistance type sensors or voltage type sensor input channels.
Further, the hall signal processing module includes: 8 Hall signal measurement channels.
Further, the magnetoelectric signal processing module includes: 2 magnetic sensor signal conditioning circuit.
Further, the low-side switch driving module includes: and 6 low-end switch channels with short-circuit protection, over-temperature protection and overvoltage protection functions.
Further, the relay low-side switch driving module includes: 16-way low-end relay switch.
Further, the high-side switch driving module includes: 6 high-end switch channels with overcurrent and overtemperature protection functions.
Furthermore, the oil injection control module comprises a main control chip, and a first high-end driving circuit, a second high-end driving circuit, a low-end driving circuit, an acquisition circuit, a diode and an oil injection valve which are respectively connected with the main control chip; wherein,
the first high-end driving circuit comprises a first high-end Mosfet driving module and a first high-end Mosfet, wherein one end of the first high-end Mosfet driving module is connected with a first output end of the main control chip, the other end of the first high-end Mosfet driving module is connected with one end of the first high-end Mosfet, and the other end of the first high-end Mosfet is connected with the anode of the diode;
the second high-end driving circuit comprises a second high-end Mosfet driving module and a second high-end Mosfet, wherein one end of the second high-end Mosfet driving module is connected with the second output end of the main control chip, the other end of the second high-end Mosfet driving module is connected with one end of the second high-end Mosfet, and the other end of the second high-end Mosfet is connected with the cathode of the diode and one end of the control end of the oil injection valve respectively;
the low-end driving circuit comprises a low-end Mosfet driving module and a low-end Mosfet, wherein one end of the low-end Mosfet driving module is connected with the third output end of the main control chip, the other end of the low-end Mosfet driving module is connected with one end of the low-end Mosfet, and the other end of the low-end Mosfet is connected with the other end of the control end of the oil injection valve;
the acquisition circuit comprises a voltage comparison module, a current sampling module and a DAC module, wherein the output end of the voltage comparison module is connected with the input end of the main control chip, the first comparison end of the voltage comparison module is connected with the output end of the current sampling module, and the second comparison end of the voltage comparison module is connected with the output end of the DAC module; the sampling end of the current sampling module is connected with the third end of the low-end mosfet, and the grounding end of the current sampling module is grounded; and the input end of the DAC module is connected with the SPI port of the main control chip.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the main control chip of prototype controller of this application adopts MPC5554 type chip, dispose power module in main control chip periphery, switching value processing module, analog quantity processing module, hall signal processing module, magnetoelectric signal processing module, communication module, high-end switch drive module, relay low side switch drive module, low side switch drive module and oil spout control module, strong commonality has, the extensible advantage, can be used for the development of high pressure common rail electrical system controller, support hardware is at the return circuit test, rack test and real car test, the distance between the product controller of having shortened from prototype controller to whole car factory self development has been shortened.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of a prototype controller for a high pressure common rail diesel engine according to the present invention;
fig. 2 is a control schematic diagram of the fuel injection module in the prototype controller of the high-pressure common rail diesel engine of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a diagram of a prototype controller structure for a high-pressure common rail diesel engine according to the present invention. As shown in fig. 1, the prototype controller includes: the fuel injection control system comprises a main control chip 101, a power supply module 102, a switching value processing module 103, an analog quantity processing module 104, a Hall signal processing module 105, a magnetoelectric signal processing module 106, a communication module 107, a high-end switch driving module 108, a relay low-end switch driving module 109, a low-end switch driving module 110 and a fuel injection control module 111.
The main control chip 101 is respectively connected to the power supply module 102, the switching value processing module 103, the analog value processing module 104, the hall signal processing module 105, the magnetoelectric signal processing module 106, the communication module 107, the high-side switch driving module 108, the relay low-side switch driving module 109, the low-side switch driving module 110, and the oil injection control module 111.
Specifically, the main control chip 101 adopts an MPC5554 type chip, the main frequency is 80MHz, the main frequency is 2MB of FLASH, and 64KB of SRAM, so as to meet the requirements of high-performance processing speed and memory size of the diesel engine electric control system. The main control chip has 3-channel high-performance CAN, meets CAN2.0 and ISO11898 standards, and meets the communication and diagnosis requirements of the control unit.
The power supply part of the original controller can bear 9-32V of power supply voltage and can be compatible with 12V and 24V systems. The power supply part simultaneously provides 4 paths of sensor power supplies with 5V output, wherein the two paths can control whether the sensors output or not through software.
In practical applications, the switching value processing module 103 may have 14 input channels, and each input channel may be configured as an input pull-up or an input pull-down.
In practical application, the analog quantity processing module 104 has 40 channels, wherein 1 channel is used for collecting the temperature on the board of the prototype controller, and 8 channels are used for collecting various voltages on the system, including the system voltage, the voltage of the oil injection control booster circuit, and the power supply output of 4 sensors; 5 channels are used for driving diagnosis, and the current of the driving circuit is recovered into the system, so that the diagnosis result of hardware can be conveniently read; the other 26 channels have open interfaces. Each channel may be selectively configured as either a resistive sensor input or a voltage sensor input.
In practical applications, the hall signal processing module 105 may have 8 hall-type signal measurement channels, each of which supports a voltage-type hall signal. The module can support frequency signal input in the range of 10Hz to 5 KHz.
The magnetoelectric signal processing module 106 includes 2 magnetoelectric sensor signal conditioning circuits, and can condition the magnetoelectric sensor signal into a square wave signal of TTL level for the MCU to recognize. The module can identify the signal amplitude to 282V, and the identifiable signal frequency range is 10 Hz-5 KHz.
And the low-side switch driving module 110 provides 6 low-side switch channels with short-circuit protection, over-temperature protection and overvoltage protection functions. The control mode of the driving chip can be parallel IO control, and can also be realized by sending a control command through an SPI bus. The 4 paths of driving signals are compatible with a PWM mode and an ON/OFF mode, and the maximum driving current of a single channel reaches 6A.
Relay low side switch driver module 109 is a 16-way low side relay switch module controlled by the SPI bus. The module can complete the control of 16 low-end relay switch channels and the diagnosis of load faults through an SPI bus, and can also control the switches of 8 channels through general IO. Meanwhile, the module has complete diagnosis and protection functions, including short circuit diagnosis and protection, over-current diagnosis and protection, over-temperature diagnosis and protection and the like.
The high-side switch driving module 108 includes two types, one high-side switch driving module provides 2 high-side drivers with different driving capabilities, and has overcurrent and overtemperature protection functions. A pin SENSE of a high-end switch driving circuit of the module can feed back a driving current, the driving current is collected through an AD module, and the driving current and an input IN and an output state OUT of the channel can judge fault states of the driving output, such as short circuit to the ground, short circuit to a power supply, over-temperature, open circuit and the like. And the other high-end switch driving module provides 4 paths of high-end switch channels with overcurrent and overtemperature protection functions. The drive circuit of the module provides a pin ST to feed back the level state of internal diagnosis, and the level state of the pin, the IN state and the OUT state can judge the fault states of the drive output, such as short circuit to the ground, short circuit to the power supply, over-temperature, open circuit and the like.
The fuel injection control module 111 supports at most 8 fuel injection drives, and the fuel injection control module 111 adopts an Enhanced Time Processing Unit (eTPU) module of the main MCU to complete sequential logic output of fuel injection control. As shown in fig. 2, the fuel injection control module 111 is connected to the first high-side driver circuit 1111, the second high-side driver circuit 1114, the low-side driver circuit 1112, and the current collector circuit 1113 by using pins of the tpu module of the main MCU. The first high-side driving circuit 1111 comprises a first high-side Mosfet driving module and a first high-side Mosfet, one end of the first high-side Mosfet driving module is connected with a first output end CH1_ PIN _ OUT of the main control chip, the other end of the first high-side Mosfet driving module is connected with one end of the first high-side Mosfet, and the other end of the first high-side Mosfet is connected with the anode of the diode; the second high-side driving circuit 1114 comprises a second high-side Mosfet driving module and a second high-side Mosfet, one end of the second high-side Mosfet driving module is connected with a second output end CH2_ PIN _ OUT of the main control chip, the other end of the second high-side Mosfet driving module is connected with one end of the second high-side Mosfet, the other end of the second high-side Mosfet is connected with a negative electrode of the diode, and the second high-side Mosfet driving circuit is further connected with one end of a control end of the oil injection valve 2. The first high-side driving circuit 1111 and the second high-side driving circuit 1114 control the current of the fuel injection valve through the PWM chopping signal output by the tpu module.
The low-end driving circuit 1112 comprises a low-end Mosfet driving module and a low-end Mosfet, wherein one end of the low-end Mosfet driving module is connected with the third output end CH3_ PIN _ OUT of the main control chip, the other end of the low-end Mosfet driving module is connected with one end of the low-end Mosfet, and the other end of the low-end Mosfet is connected with the other end of the control end of the fuel injection valve 2. The low side driver circuit 1112 controls the return current to ground of the fuel injection valve current from the edpu module.
The acquisition circuit 1113 comprises a current sampling module, a voltage comparison module and a DAC module, wherein the output end of the voltage comparison module is respectively connected with the input ends CH1_ PIN _ IN and CH2_ PIN _ IN of the main control chip, the first comparison end of the voltage comparison module is connected with the output end of the current sampling module, and the second comparison end is connected with the output end of the DAC module; the sampling end of the current sampling module is connected with the third end of the low-end mosfet, and the grounding end of the current sampling module is grounded; and the input end of the DAC module is connected with the SPI port of the main control chip. The acquisition circuit 1113 is responsible for sampling and comparing the current of the fuel injection valve, and simultaneously transmits the comparison result to the eTPU module to be used as a feedback signal for current closed-loop control, so that the accurate control of the output current of the fuel injector is realized.
It should be noted that, the utility model discloses a prototype controller for high pressure common rail diesel engine adopts the more general control chip in automotive filed as main control chip, and compatible 12V and 24V's system possesses basic CAN, K and LIN communication function. The input part of the control device comprises digital input, analog input, frequency input, magnetoelectric signal input and the like, the output part of the control device has the functions of a high-side switch, a low-side switch and the like with different driving capacities, the control of a switching valve and a proportional valve is supported, meanwhile, the control device also supports the control of a Peak-Hold type oil injector with at most 8 channels, and the maximum driving current can reach 29A. The same hardware platform can be used in different occasions through configuration.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. A prototype controller for a high pressure common rail diesel engine, comprising: the device comprises a main control chip, a power supply module, a switching value processing module, an analog value processing module, a Hall signal processing module, a magnetoelectric signal processing module, a communication module, a high-end switch driving module, a relay low-end switch driving module, a low-end switch driving module and an oil injection control module; the main control chip is respectively connected with the power supply module, the switching value processing module, the analog value processing module, the Hall signal processing module, the magnetoelectric signal processing module, the communication module, the high-end switch driving module, the relay low-end switch driving module, the low-end switch driving module and the oil injection control module.
2. The prototype controller according to claim 1, wherein the master control chip is an MPC 5554.
3. The prototype controller of claim 1, wherein the power module comprises: and 4-path 5-volt output sensor power supply.
4. The prototype controller according to claim 1, wherein the analog input module comprises: the system comprises 1 controller on-chip temperature detection channel, 8 power supply voltage acquisition channels, 5 driving diagnosis channels and 26 resistance type sensors or voltage type sensor input channels.
5. The prototype controller according to claim 1, wherein the hall signal processing module comprises: 8 Hall signal measurement channels.
6. The prototype controller according to claim 1, wherein the magnetoelectric signal processing module comprises: 2 magnetic sensor signal conditioning circuit.
7. The prototype controller according to claim 1, wherein the low-side switch driver module comprises: and 6 low-end switch channels with short-circuit protection, over-temperature protection and overvoltage protection functions.
8. The prototype controller according to claim 1, wherein the relay low-side switch driving module comprises: 16-way low-end relay switch.
9. The prototype controller according to claim 1, wherein the high-side switch driving module comprises: 6 high-end switch channels with overcurrent and overtemperature protection functions.
10. The prototype controller according to claim 1, wherein the fuel injection control module comprises a main control chip, and a first high-end driving circuit, a second high-end driving circuit, a low-end driving circuit, an acquisition circuit, a diode and a fuel injection valve which are respectively connected with the main control chip; wherein,
the first high-end driving circuit comprises a first high-end Mosfet driving module and a first high-end Mosfet, wherein one end of the first high-end Mosfet driving module is connected with a first output end of the main control chip, the other end of the first high-end Mosfet driving module is connected with one end of the first high-end Mosfet, and the other end of the first high-end Mosfet is connected with the anode of the diode;
the second high-end driving circuit comprises a second high-end Mosfet driving module and a second high-end Mosfet, wherein one end of the second high-end Mosfet driving module is connected with the second output end of the main control chip, the other end of the second high-end Mosfet driving module is connected with one end of the second high-end Mosfet, and the other end of the second high-end Mosfet is connected with the cathode of the diode and one end of the control end of the oil injection valve respectively;
the low-end driving circuit comprises a low-end Mosfet driving module and a low-end Mosfet, wherein one end of the low-end Mosfet driving module is connected with the third output end of the main control chip, the other end of the low-end Mosfet driving module is connected with one end of the low-end Mosfet, and the other end of the low-end Mosfet is connected with the other end of the control end of the oil injection valve;
the acquisition circuit comprises a voltage comparison module, a current sampling module and a DAC module, wherein the output end of the voltage comparison module is connected with the input end of the main control chip, the first comparison end of the voltage comparison module is connected with the output end of the current sampling module, and the second comparison end of the voltage comparison module is connected with the output end of the DAC module; the sampling end of the current sampling module is connected with the third end of the low-end mosfet, and the grounding end of the current sampling module is grounded; and the input end of the DAC module is connected with the SPI port of the main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320448912.6U CN203420815U (en) | 2013-07-25 | 2013-07-25 | Prototype controller for high pressure common rail diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320448912.6U CN203420815U (en) | 2013-07-25 | 2013-07-25 | Prototype controller for high pressure common rail diesel engine |
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| CN203420815U true CN203420815U (en) | 2014-02-05 |
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| CN201320448912.6U Expired - Lifetime CN203420815U (en) | 2013-07-25 | 2013-07-25 | Prototype controller for high pressure common rail diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763548A (en) * | 2015-03-04 | 2015-07-08 | 北京经纬恒润科技有限公司 | Oil injection current control system and method |
| CN105545513A (en) * | 2016-02-05 | 2016-05-04 | 天津大学 | Embedded common rail diesel engine electronic control system based on MPC5554 and method |
-
2013
- 2013-07-25 CN CN201320448912.6U patent/CN203420815U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763548A (en) * | 2015-03-04 | 2015-07-08 | 北京经纬恒润科技有限公司 | Oil injection current control system and method |
| CN105545513A (en) * | 2016-02-05 | 2016-05-04 | 天津大学 | Embedded common rail diesel engine electronic control system based on MPC5554 and method |
| CN105545513B (en) * | 2016-02-05 | 2018-03-30 | 天津大学 | Based on the Embedded common rail diesel engine electric-control systems of MPC5554 and method |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hirain Technologies Co.,Inc. Address before: B1 / F, Northern Territory, Dongsheng Science Park, 66 xixiaokou Road, Haidian District, Beijing 100192 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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