CN202431379U

CN202431379U - Control device for electric control diesel engine supercharger

Info

Publication number: CN202431379U
Application number: CN2011204852591U
Authority: CN
Inventors: 郎明华; 简林莎; 牛振乾; 孙文明; 吉跟昌; 阎景波
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2012-09-12
Anticipated expiration: 2021-11-29

Abstract

The utility model discloses a control device for an electric control diesel engine supercharger. The device comprises a singlechip, a speed sensor, an inlet air temperature sensor, an inlet air pressure sensor, an air flow sensor and an air throttle sensor, wherein the speed sensor is arranged at a crankshaft; the inlet air temperature sensor is arranged at an air inlet pipe of an air filter; the inlet air pressure sensor is arranged at the front section of an air inlet branch pipe; the air flow sensor is arranged at the air inlet pipe at the back of the air filter; the air throttle sensor is arranged at an air throttle; and the speed sensor, the inlet air temperature sensor, the inlet air pressure sensor, the air flow sensor and the air throttle sensor are respectively connected with the singlechip. By using the device provided by the utility model, the supercharge pressure of a diesel engine can be adjusted in real time, so that the combustion conditions of the diesel engine can be improved, oil consumption can be reduced, and simultaneously supercharging pressure is limited and the diesel engine and the supercharger are protected; and moreover, the supercharging pressure is established quickly, pressure characteristics are stabilized, and an accelerator pedal position in an overall diesel engine rotating speed range has high-efficiency torque output.

Description

A kind of control gear of electronic controlled diesel pressurized machine

Technical field

The utility model relates to the automatic control technology field, is specifically related to a kind of control gear of electronic controlled diesel pressurized machine.

Background technique

Generation and development along with supercharging technology; The combustion position of motor obtains very big improvement; For the diesel engine using supercharging technology; Can improve the density of air inlet and the quality of burning to a great extent; Can improve the power character and the Economy of diesel engine so greatly, but also exist many shortcomings about the control technique aspect of pressurized machine: the first, handle the efficient district of gas compressor relation narrower and rotating speed and flow under the operating mode that changes for present can not good treatment aspect automatically controlled; The second, when improving mean effective pressure, to improve its boost pressure, so just receive the restriction of bursting pressure and maximum temperature; The 3rd; Because the imperfection owing to control unit in pressurization system makes that the deferred reaction to the oil sudden change causes diesel oil to postpone and reduce the shortcomings such as power of output under the impeller effect of inertia; These pressurized machine control deficiencys make the application of controller on diesel engine receive very big restriction, and novel electronic controlled diesel supercharging device will effectively address these problems.

Summary of the invention

Defective or deficiency to existing technology; The purpose of the utility model is to provide a kind of control gear of electronic controlled diesel pressurized machine; With when guaranteeing Economy and reliability, improve the specific power and the output power of diesel engine, avoid occurring delay phenomenon simultaneously.

For realizing above-mentioned technical assignment, the utility model is taked following technical solution:

A kind of control gear of electronic controlled diesel pressurized machine; It is characterized in that, comprise single-chip microcomputer, be installed on the bent axle place speed probe, be installed on the air-cleaner snorkel place intake air temperature sensor, be installed on air intake branch leading portion place air inlet pressure sensor, be installed in the air flow sensor at the suction tude place behind the air-strainer and be installed in the throttle sensor at closure place; Said speed probe, intake air temperature sensor, air inlet pressure sensor, air flow sensor and throttle sensor are connected with single-chip microcomputer respectively.

Said single-chip microcomputer adopts the MC9S12DG128B single-chip microcomputer.

Described pressure transducer adopts QBE9000-P16 type pressure transducer.

Described intake air temperature sensor adopts BJYYL100 type intake air temperature sensor.

The device of the utility model can be real-time adjusting diesel engine supercharging pressure; Thereby improve the combustion case of diesel engine; Can reduce oil consumption again; Limited simultaneously supercharging pressure protect diesel engine and pressurized machine, and can make that boost pressure is set up fast, high efficiency torque output arranged on steady pressure characteristic and the accelerator pedal position in whole diesel engine speed scope.The more important thing is can be real-time for diesel engine provides suitable boost pressure, reduce oil consumption and the specific power that improves diesel engine.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the workflow schematic representation of the single-chip microcomputer of the utility model;

Fig. 3 is the pretreatment control module workflow diagram of the utility model;

Fig. 4 is the theoretical value computing module workflow diagram of the utility model:

Fig. 5 is the utility model parameter adaptive module workflow diagram;

Fig. 6 is that the utility model detects and the closing module workflow diagram.

The following explanation of according to accompanying drawing the utility model being done to pass in and out a step.

Embodiment

As shown in Figure 1, the control gear of the electronic controlled diesel pressurized machine that this embodiment provides comprises the MC9S12DG128B single-chip microcomputer, be installed on the speed probe at bent axle place, be installed on the air-cleaner snorkel place intake air temperature sensor, be installed on air intake branch leading portion place air inlet pressure sensor, be placed in the air flow sensor at suction tude place behind the air-strainer and be installed in the throttle sensor at closure place; Said speed probe, intake air temperature sensor, air inlet pressure sensor, air flow sensor and throttle sensor are connected with single-chip microcomputer respectively, and the pressurized machine that device is controlled is connected with single-chip microcomputer.

As shown in Figure 2; Pretreatment control module, expected value computing module, parameter adaptive unit and detection/closing module are the main work links in the single-chip microcomputer; Various sensors are connected with the expected value computing module with the pretreatment control module; These two modules are connected with the parameter adaptive module then; Detection/closing module wherein also is connected with the parameter adaptive module, and the final parameter adaptation module to pressurized machine, makes final information transmission pressurized machine obtain suitable supercharging numerical value and carries out pressurized treatment.

The speed probe that is installed in the bent axle place is used to measure the rotating speed of motor, and its rotating speed that records is transferred to the pretreatment control module in the control unit;

The intake air temperature sensor that is installed in the air-cleaner snorkel place is used to measure the temperature of air inlet, its temperature information that records is transferred to the pretreatment control module of control unit;

The air inlet pressure sensor that is installed in air intake branch leading portion place is used to measure the pressure of air inlet, with the parameter adaptive module of its information transmission to control unit;

The air flow sensor of the position after being placed in air-strainer, before the closure mainly is to convert the inhaled air flow to electrical signal to deliver to ECU (ECU), as the baseband signal of decision oil spout;

The throttle sensor that is installed in the closure place converts throttle opening to voltage signal, the control fuel injection quantity;

The control information of pressurized machine receiving control device transmission, and will make the response of whether supercharging or supercharging value for what.

The used MC9S12DG128B single-chip microcomputer of the utility model is a kind of in 16 single-chip microcomputers of the M68HC12 of motorola inc series; Its internal structure mainly contains the single-chip microcomputer substantial section and the CAN function block is partly formed, and basic structure comprises: a central processor unit HCS12 (CPU), 2 asynchronous serial communication mouth SCI; 2 synchronous serial communication mouth SPI; 8 passages input capture/output is timer relatively, and 18 passage pwm unit and 49 independent digit I/O mouths (wherein 20 have external interrupt and arousal function) also have the Flash ROM of 128KB in sheet; The RAM of 8KB, the EEPROM of 2KB; The CAN function block comprises the msCAN controller composition of two compatible CAN2.0A/B agreements; Internal resource that these are abundant and external interface resource can satisfy ECU to the processing of various data, the transmission and the reception requirement of CAN network data; The gateway node function of high low speed CAN network can be realized in chip is integrated two msCAN12 unit.Concrete single-chip microcomputer MC9S12DG128 pin figure is shown in accompanying drawing 6.

The pretreatment control module is utilized the given fast boost pressure empirical value of interpolation function through motor mean speed and the fuel injection quantity that speed probe, air flow sensor and throttle sensor send; Cooperate injection system and air system to give aim parameter of oil sprayer fast with this; Thereby drive the expected value computing module calculate diesel engine the size of the force value that will increase; And the parameter adaptive module is carried out the control operation of closed loop through pretreatment unit and boost pressure expected value; Thereby draw the boost pressure value size under current working more accurately; If but the force value of supercharging will be utilized the function of monitoring/closing module so not in the scope of regulation, come this system is replenished diesel engine supercharging and the normal work smoothly of guaranteeing with this.

Pretreatment control module part in the single-chip microcomputer all is connected with pressure transducer, intake air temperature sensor, Air flow meter, throttle sensor with the expected value computing module.The working procedure of its pretreatment control module and expected value computing module is referring to accompanying drawing 3 and accompanying drawing 4; Atmospheric pressure signal, intake air temperature signals and fuel injection quantity information through each sensor input are directly carried out the MAP interpolation operation; And then obtain the pressure basic experience value of supercharging, if thereby the proper reaction time that will make system of handling becomes improves the speed of response of system rapidly, in addition; When confirming the force value of supercharging, confirm through two paths; Wherein the pressure of supercharging is next predetermined by the pretreatment control module, and then passes to the expected value computing module and further calculate and study, and finally obtains the accurate pressure value; And then the parameter that obtains carried out static calculation; Dynamically revise according to gas handling system temperature and engine temperature field temperature, at last static calculation is carried out comprehensively also revising with dynamically revising, the correction value that finally is met condition is exactly the calculated value of boost pressure.

Follow the detected information of adaptive mode bonded pressure transducer of the parameter in the single-chip microcomputer and the computing result of above-mentioned two modules; Carry out the Comprehensive Control of closed loop; Concrete working procedure is seen accompanying drawing 5; A PID controller is arranged in single-chip microcomputer, and this control section just has the PID controller in the main control unit to realize.Here the force value of the pressurized air that obtains of the supercharging value at first the theoretical calculation unit calculated of this control module part and real sensor is subtracted each other and has been obtained deviate; And deviate is input to the PID controller; Do further processing afterwards again; Carry out closed-loop process control and adjusting then; Output value through closed loop control switch and pretreatment control module obtain is revised each other, if but the boost pressure value of the adaptation module of parameter output will be carried out threshold process when exceeding the value of actual qualification, so passing threshold is handled and can the regulated value that processing obtains be exported.

Monitoring in the last single-chip microcomputer and closing unit are to confirm boost pressure is carried out open loop control or closed loop control according to the runnability of diesel engine and operating range; Concrete control flow sees attached list 5; If the scope of pressurized machine is determined; Then corresponding state can feed back to the parameter adaptive module, carries out comprehensive analysis at last, thereby exports final boost pressure regulated value.

Electronic parts and components in the control gear of the electronic controlled diesel pressurized machine of the utility model all are commercially available known product, and those skilled in the art can realize the connection of each electronic parts and components according to the technique effect of the utility model.

Claims

1. the control gear of an electronic controlled diesel pressurized machine; It is characterized in that, comprise single-chip microcomputer, be installed on the bent axle place speed probe, be installed on the air-cleaner snorkel place intake air temperature sensor, be installed on air intake branch leading portion place air inlet pressure sensor, be installed in the air flow sensor at the suction tude place behind the air-strainer and be installed in the throttle sensor at closure place; Said speed probe, intake air temperature sensor, air inlet pressure sensor, air flow sensor and throttle sensor are connected with single-chip microcomputer respectively.

2. the control gear of electronic controlled diesel pressurized machine as claimed in claim 1 is characterized in that, said single-chip microcomputer adopts the MC9S12DG128B single-chip microcomputer.

3. the control gear of electronic controlled diesel pressurized machine as claimed in claim 1 is characterized in that, described pressure transducer adopts QBE9000-P16 type pressure transducer.

4. the control gear of electronic controlled diesel pressurized machine as claimed in claim 1 is characterized in that, described intake air temperature sensor adopts BJYYL100 type intake air temperature sensor.