CN1153007C - Microcomputer gasoline injection control system for motor cycle - Google Patents

Abstract

The present invention provides a microcomputer gasoline injection control system for motor cycles, which is widely suitable for gasoline injection control systems of motor cycle engines. The system adopts the cooperation of a microcomputer program and corresponding hardware; fuel supply quantity needed by each working cycle of a motor cycle engine, and ignition time are accurately computed and controlled by collecting and sampling various working conditions and working environments of the motor cycle engine; a sensor signal is used for carrying out closed loop control to make tail gas of the motor cycle engine achieve discharge standards prescribed by China ordinances and legislations; power performance, economy, use reliability and response characteristic achieve the optimal state.

Description

MIcrocomputer gasoline injection control system for motor cycle

Technical field

The present invention relates to a kind of MIcrocomputer gasoline injection control system for motor cycle, it is widely used in motorcycle engine gasoline injection control system.

Background technique

Existing carburetor type oil supply system belongs to backward passive fuel system.It utilizes the work of sprayer principle, under the big situation of motorcycle rotation speed change, can't provide accurately and optimum oil feeding, and its fuel feeding depends on oily level, intake depression and metering-orifice precision and the characteristic in the float chamber.Because the excessive characteristic between metering-orifice and the metering-orifice is difficult to control, Carburetor is very responsive to the variation of atmospheric temperature and engine operating condition, so control accuracy is not high.

Summary of the invention

The objective of the invention is to provide a kind of MIcrocomputer gasoline injection control system for motor cycle, and it can provide initiatively fuel system, so control accuracy is high.

The present invention adopts micro computer that various running environment of motorcycle engine and working condition are carried out quick sampling.Analyze and calculate, accurately control the fuel injection quantity and the supply time of each work cycle of engine fuel system, and adopt constant charge oil pressure, provide initiatively fuel system, so control accuracy is high.The present invention also adopts the advanced algorithm controls solid-state ignition system advance angle of engine ignition of unifying, and controls exhaust emissions with Closed loop Control, and the harmful gas that motorcycle engine is discharged is reduced to minimum, meets the requirement of national engine exhaust emission standard.

The present invention adopts unique computer programming algorithm and hardware design, makes program short and small concise, and software failure rate is extremely low, and hardware is simple and reliable, and is with low cost.Because the accurate and firing time of engine oil control is punctual, makes that the burning of motorcycle engine is complete, power character and response characteristic are all good than existing carburetor engine.Microcomputer control system of the present invention can be saved gasoline than existing carburetor oil-supply system and reach 15% to 20%.

Description of drawings

The present invention is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the microcomputer control system structured flowchart.

Fig. 2 is the microcomputer control system electrical schematic diagram.

Fig. 3 is microcomputer control system planning figure.

Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d are the microcomputer control system main program flow charts.

Fig. 5 a, Fig. 5 b, Fig. 5 c, Fig. 5 d, Fig. 5 e are microcomputer control system subroutine flow chart collection

Table 1 is element model and encapsulation pattern table.

Table 2 is constant, variable, address ram, BIT position definition list.

Embodiment

With reference to Fig. 2, microcomputer control system electrical schematic diagram of the present invention is made up of central processing unit (CPU), signal input collecting treatment circuit, output circuit and power supply power pack.Central processing unit (CPU) U1 adopts 8XC552 series 8 bit cpu chips, is operated in frequency 12MHz and the start situation that automatically resets.0,1,2,3 pin of the P1 mouth of this CPU are as the signal output pin, and P1.0, P1.2 pin are as the fuel injection pulse signal output pin, and the P1.1 pin is as oil pump signal output pin, and the P1.3 pin is as the ignition pulse signal output pin, and the P1.4 pin is as the oxygen sensor signal input pin.0,1,2,3 pin of P5 mouth are as the analog-digital conversion a/d input pin, the P5.0 pin is used for the input of throttle opening analog-to-digital conversion signal, the P5.1 pin is used for the input of engine temperature analog-to-digital conversion signal, the P5.2 pin is used for the input of intake temperature analog-to-digital conversion signal, and the P5.3 pin is used for the input of voltage functuation monitoring analog-to-digital conversion signal.The P4.7 pin is used for the input of A/D analog-to-digital conversion actuating signal.P3.3 pin INT1 is used for the CRANK PULSES signal input after the shaping, and P3.2 pin INT0 is used for the input of starting motor signal.34,35 pin cooperate crystal oscillator X1, and capacitor C 14, C15 produce the central processor CPU clock, and 15 pin are system reset pin.Indicate X person among the figure and be empty pin entirely.Signal input collecting treatment circuit mainly is made up of elements such as operational amplifier U2 (LM224), D type socket DB15, transistor Q4, adjustable resistance WR1, diode D3, logical circuit U3B and U3C.The throttle opening signal is imported after capacitor C 11 filtering enter the P5 mouth ADC0 pin of CPU by D type socket DB15 the 1st hole, engine temperature signal is imported after capacitor C 12 filtering by D type socket DB15 the 8th hole, operational amplifier U2B carries out entering after the window amplification is isolated the P5 mouth ADC1 pin of CPU, intake air temperature signals is imported after capacitor C 9 filtering by D type socket DB15 the 6th hole, operational amplifier U2A carries out entering after the window amplification is isolated the P5 mouth ADC2 pin of CPU, oxygen sensor signal is imported after capacitor C 10 filtering by P5 mouth DB15 the 7th hole of CPU, operational amplifier U2C carries out entering after the window amplification is isolated the P4 mouth P1.4 pin of CPU, the mains ripple monitor signal is obtained by adjustable resistance WR1 and resistance R 4, enter the P5 mouth ADC3 pin of CPU after operational amplifier U2D isolates, the engine crankshaft pulse signal is imported after diode D3 detection by D type socket DB15 the 5th hole, triode Q4 amplitude limit, enter CPU after the operational amplifier U3C shaping paraphase and interrupt pin INT1.The output circuit that contains time base circuit is mainly by logical circuit U3D, U3A, time base circuit U6 (NE555), relay K 1, transistor Q1 and Q3, and control signal accessory power outlet JP1, elements such as diode D1, D2 are formed.After isolating, logical circuit U3D paraphase gives 5 pin that power combination switch pipe Q3 outputs to control signal accessory power outlet JP1 from the fuel injection pulse signal of P1 mouth P1.0, the P1.2 of CPU output by resistance R 13; the supply engine nozzle is with pulsed voltage; resistance R 11 is used to improve output pulse waveform, and the self-induced e.m.f that diode D2 is used to absorb engine fuel injector comes protective transistor Q3.Deliver to transistor Q1 from the electronics oil pump control signal of the P1.1 of CPU output through resistance R 12; adhesive electronics FP Fuel Pump Relay K1; send 3 pin of 12V operating voltage to control signal accessory power outlet JP1; oil pump is started working, and diode D1 is used to absorb the self-induced e.m.f of relay K 1 and protects transistor Q1.After after logical circuit U3A, capacitor C 16 paraphase are isolated, delivering to U6 (NE555) time base circuit broadening from the ignition pulse signal of the P1.3 of CPU output by the 1 pin output of control signal accessory power outlet JP1, supply engine CDI igniter electrical fire signal, adjustable resistance W4 is used to adjust the firing pulse width.The P3.1 of central processing unit (CPU) (CPU), P3.0 pin are used to cooperate dedicated serial intergrated circuit U7 (MAX232) as serial input/output circuit, and it is made up of serial intergrated circuit U7, capacitor C21, C22, C23, C24, C25 and socket JP4.Serial intergrated circuit U7 is by the inlet opening of socket JP4 as delivery outlet and the suction pressure signal of error signal ERR, and input/output signal is handled and controlled by central processor CPU (U1).The peripheral capacitor C 21-C25 of serial intergrated circuit U7 is as its voltage transformation element, and indicating that the pin of X is empty need not.Power supply stabilization circuit is mainly by three terminal regulator U4 (78L06) and U5 (78L05), and inductor L2, L3 and capacitor C1-C8 form.From control signal accessory power outlet JP1 come in+the 12V power supply supplies with the voltage stabilizing of U4 (78L06) circuit of three-terminal voltage-stabilizing integrated through capacitor C1, C2 filtering, through capacitor C7, operational amplifier U2, U6 are supplied with in C8 filtering required+6V voltage.The voltage stabilizing of U5 (78L05) circuit of three-terminal voltage-stabilizing integrated is supplied with on another road after capacitor C1, C2 filtering, through capacitor C3, C4 filtering supply with central processor CPU (U1), intergrated circuit U7 required+5V voltage.Supply with the AVDD pin simulation power supply voltage and the VDD pin numeral power supply voltage of central processor CPU (U1) again after inductor L2, L3 and capacitor C5, C6 filtering, contact JP2 is the analog circut common ground point.Core of the present invention is a microcomputer program.With reference to Fig. 4 and Fig. 5, this program is made up of system's main program, revolution speed calculating subroutine, basic fuel injection amount counting subroutine, operating mode judgment processing subroutine, startup enriching subroutine, operating mode fuel injection quantity subroutine, firing pulse subroutine, interruption subroutine, fault executive routine and limping program.It is solidificated in the program memory ROM of central processor CPU (U1) of micro computer after AES and optimization process.

Table one element model and encapsulation pattern table

Part Type	Desig nator	Footprint
				JP2	SIP2
0.01	C12	SIP2
			0.01	C10	sip2
0.01	C11	SIP2
			0.01	C9	sip2
0.1	C5	RAD-0.2
			0.1	C8	rad-0.2
0.1	C24	RAD0.1
			0.1	C2	rad-0.2
0.1	C4	rad-0.2
			0.1	G6	rad-0.2
1000P	C16	SIP2
			100K	W1	VR-5
100K	R15	AXIAL0.3
			100K	W3	VR-5
100K	R1	AXIAL0.3
			100n	C18	SIP2
100U/16V	C7	RB.2/4
			10K	R3	AXIAL0.3
10K	R2	AXIAL0.3
			10K	R17	AXIAL0.3
10K	R13	AXIAL0.3
			10K	R6	AXIAL0.3
10K	R11	AXIAL0.3
			10K	R12	AXIAL0.3
10n	C20	SIP2
			10n	C17	SIP2
10U/16V	C22	RAD0.1
			10U/16V	C21	RAD0.1
10U/16V	C23	RAD0.1
			10U/16V	C25	RAD0.1
10V	WD1	SIP2
			12MHZ	X1	XTAL1
1N4007	D3	AXIAL0.3

1N4007	D1	AXIAL0.3
			1N4007	D2	A×IAL0.3
22U/16V	C13	RB.2/.4
			20K	R5	AXIAL0.3
20K	R16	AXIAL0.3
			20K	W2	VR-5
220U/25V	C19	RAD-0.2
			22K	R7	AXIAL0.3
2k	R10	AXIAL0.3
			30P	C14	SIP2
30P	C15	SIP2
			470u/16v	C3	RB.2/.4
470u/25v	C1	RB.2/.4
			5.6k	R9	AXIAL0.3
50K	W4	VR-5
			5K6	R14	AXIAL0.3
5K6	R4	AXIAL0.3
			5UH	L2	AXIAL0.3
5uH	L3	AXIAL0.3
			78L05	U5	TO220H
78L06	U4	TO220H
			8XC552	U1	LCC-68
9012	Q4	VR-4
			9012	Q1	VR-4
CD4011	U3	DIP-14
			ERR I/O	JP4	SIP4
INPUT SIGNAL	DB15	DB-15/M
			LM224	U2	DIP-14
MAX232	U7	DIP16
			NE555	U6	DIP8
POWER/I SIGN/O	JP1	POWER6
			PUMP RELAY	K1	NMAXX_DIL
SPRAY HEAD	JP3	SIP4
			T142	Q3	TO220H

Table two constant, variable, RAM, BIT position definition list

OILCTRL BIT P1.0; The oil sprayer control bit

p1.2 BIT P1.2

KINDLE EQU P1.3; The firing pulse position

OILPOMP BIT P1.1; The pump switch position

TXD EQU P3.1; RS232 sends out

RXD EQU P3.0; RS232 receives

MOTOR EQU P3.2; The starting motor position

CRANK EQU P3.3; The CRANK PULSES input

COMMP02 BIT P1.4; The comparator input

REST data ' 15 '; The external reset position

0SC_X1 data ' 35 '; Outside vibration 1

0SC_X2 data ' 36 '; Outside vibration 2

AD_0 EQU P5.0; Analog-to-digital conversion 0

AD_1 EQU P5.1; Analog-to-digital conversion 1

AD_2 EQU P5.2; Analog-to-digital conversion 2

AD_3 EQU P5.3; Analog-to-digital conversion 3

VSS DATA ' P58 '; Grounding leg

AVDD DATA ' P59 '; Analog power+5V

PTOAD DATA OF6H; The analog-to-digital conversion control register

POM2 DATA 85H; The delivery outlet definition is provided with

POM1 DATA 84H; The delivery outlet definition is provided with

OIL_BUF EQU 30H; The accelerator open degree buffer register

；

AIR_T EQU 31H; The intake temperature buffer register

MACH_BF EQU 32H; The machine temperature buffer register

VOL_BUF EQU 33H; The voltage compensation buffer register

AIR_BUF EQU 34H; The air quantity buffer register

FIRST_ EQU 35H; The revolution register

BASICH EQU 36H; Basic fuel injection amount register H

BASICL EQU 37H; Basic fuel injection amount register L

M_i EQU 38H; Data sheet subscript (i)

M_j EQU 39H; Data sheet subscript (j)

ADC_N EQU 3AH; The analog-digital converter numbering

COUNTH EQU 3BH; Spin counter high eight-bit RAM

COUNTL EQU 3CH; Spin counter hangs down eight RAM

Tv EQU 3DH; Voltage compensation fuel injection quantity register

TM EQU 3EH; Temperature correction fuel injection quantity RAM

COOL_ EQU 3FH; Cold start fuel injector amount register

；

SPEED_S EQU 20H; Speed cone fixed point 0-12KRPM/min

0IL_S EQU 21H; Closure A/D conversion amount

Oangle EQU 22H; Throttle opening 0,6 ..., 84,90 degree

NOT_O EQU 23H; Closure A/D conversion amount is negated

Pump_T EQU 28H; Oil pump timer cycle values

COOL_X EQU 2DH; Cold start-up enriching time number register

STA_X EQU 2EH; Start enriching time number register

ON_OFF EQU 2FH; The switching value flag register

OIL BIT 127; The oil sprayer switch bit

QUICK BIT 126; Quicken sign

WEAK BIT 125; Reduce-speed sign

HIGH_ BIT 124; The hypervelocity sign

SLOW BIT 123; The low speed sign

HIGH BIT 124; The hypervelocity sign

SLOW BIT 123; The low speed sign

FIRSTB BIT 122; The 200RPM sign

SENSOR BIT 121; Lambda sensor overrich sign

COOL_M BIT 120; Motor low temperature sign

FFX EQU 40H; Interpolation point X coordinate

FX1 EQU 41H; Interpolation point X1 coordinate

FX2 EQU 42H; Interpolation point X2 coordinate

FX3 EQU 43H; Interpolation point X3 coordinate

FY EQU 44H; Interpolation point Y coordinate

FY1 EQD 45H; Interpolation point Y1 coordinate

FY2 EQU 46H; Interpolation point Y2 coordinate

FY3 EQU 47H; Interpolation point Y3 coordinate

FZX_H EQU 4CH; Point X interpolation high eight-bit

FZX_L EQU 4DH; Low eight of some X interpolation

FZ_Yh EQU 4EH; Point Y interpolation high eight-bit

FZ_YL EQU 4FH; Low eight of some Y interpolation

SPEEDL EQU 50H; Low eight of sixteen bit rotating speed

SPEEDH EQU 51H; Sixteen bit rotating speed high eight-bit

TABEL EQU OaO0H; The heading address

Claims (4)

1, a kind of MIcrocomputer gasoline injection control system for motor cycle is characterized in that:

A, microcomputer program are solidificated in the program memory ROM of micro computer central processor CPU after AES and optimization process;

B, the central processing unit (CPU) U1 that is solidified with microcomputer program adopt 8 * C552 series, 8 bit CPU singlechip chips, are operated in frequency 12Mhz and the start situation that automatically resets;

C, microcomputer control system match with the output circuit that contains time base circuit by signal input collecting treatment circuit, realize collecting sampling and accurately control.

2, microcomputer control system according to claim 1, it is characterized in that microcomputer program by system's main program, revolution speed calculating subroutine, basic fuel injection amount counting subroutine, operating mode judgment processing subroutine, start enriching subroutine, operating mode fuel injection quantity subroutine, firing pulse subroutine, interruption subroutine, fault execution subroutine and limping program and form.

3, microcomputer control system according to claim 1 is characterized in that signal input collecting treatment circuit is made up of LM224 operational amplifier U2, D type socket DB15, transistor Q4, adjustable resistance WR1, diode D3, logical circuit U3B and U3C.

4, microcomputer control system according to claim 1 is characterized in that output circuit is made up of logical circuit U3D and U3A, NE555 time base circuit U6, relay K 1, transistor Q1 and Q3, control signal accessory power outlet JP1, diode D1 and D2.

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