CN201321897Y - Floor-type electronic throttle assembly for diesel engine - Google Patents

Abstract

The utility model pertains to a throttle control device for a diesel engine and provides a floor-type electronic throttle assembly for a diesel engine. A position sensor assembly 4 is arranged; a movable arm 9 which is connected with a rotating body 12 in a sensor by a sensor rotating shaft 3 drives the rotating body 12 to rotate along with the movable arm 9; the other end of the movable arm 9 is articulated with a guide pulley 10 and causes the guide pulley 10 to be positioned on the inclined surface at one end of a motherboard; an electric brush 12 internally arranged in the sensor is connected with the rotating body 12 and rotates along with the rotating body; an output signal of the sensor is connected with an electric control unit (ECU) of the diesel engine; a throttle opening degree identifying mechanism is arranged on the corresponding motherboard of the sensor; a locating pin 21 in the throttle opening degree identifying mechanism can be moved up and down under the effect of a step and automatically restore under the effect of a restoring spring. The floor-type electronic throttle assembly has the advantages of improving the power and economical performance of the engine, reducing the discharge of nitrogen oxides and smoke intensity, effectively lowering the working noise of the diesel engine and improving low-temperature start ability.

Description

Floor electronic throttle assembly for diesel motor

Technical field

The utility model belongs to the diesel engine accelerator control device of electronically controlled unit pump formula injection system, is specifically related to floor electronic throttle assembly for diesel motor.

Background technique

At present, what utilize on the ordinary diesel oil motor at home is that traditional mechanical high-voltage oil pump aperture controlling method is the acceleration cable control mode, and it controls mixed gas by adjusting oil pump output terminal flow.Because the ordinary diesel oil machine is to be driven by engine cam, by means of high pressure oil pump diesel oil is transported to each cylinder fuel oil chamber, this fuel system will change with the variation of engine speed, do not accomplish the optimum oil feeding under the various rotating speeds, can't accurately control proportions of ingredients, thereby fuel can not perfect combustion, causes toxic emission to exceed standard, environmental pollution.And the fuel-injected system of electronic controlled diesel that has more and more generally adopted now can better address this problem.

Along with The development in society and economy, more and more higher to environmental protection requirement, the application of diesel electric-controlled system on automobile is also more and more extensive, such as electric-controlled co-rail system and the electronically controlled unit pump system application on multi-cylinder diesel engine showed increased.The electronically controlled unit pump injection system is a kind of novel fuel ejecting system of can freedom and flexibility adjusting fuel injection quantity and injection timing, having high injection pressure, and its fuel injection processes for diesel engine provides more flexible control technique; And increased substantially injection pressure, cooperated efficient burning control effectively with accurate injection process.Monoblock pump is the single cylinder high pressure pump system of a kind of modularization, time control, general parts as a whole are contained on the cylinder block of diesel engine, directly driven through roller tapper by the injection cam on the engine cam, closed electromagnetic valve constantly determines beginning of injection and fuel injection quantity respectively with the endurance of closing.

Problem to be solved by this invention is: how the ECU unit for electronic fuel injection engine provides the necessary control signal, receive and analyze from the throttle position switch data by ECU, judge engine working conditions, by final controlling element motor is controlled accurately wherein most important control command again: fuel injection quantity and injection timing pulse.

The same with conventional mechanical formula diesel engine, Electronic Unit Pump Diesel Engine also is by throttle motor to be controlled, and what different just automatical control systems adopted is efp.E-Gas is by the driving intention of control wire harness with the driver, be that power and speed of a motor vehicle demand are converted into accelerator open degree and feed back to ECU, calculate the oil mass of demand then according to accelerator open degree and current diesel engine speed by the fuel-flow control module, thereby realize the adjusting of the power and the speed of a motor vehicle, provide best oil gas mixing ratio to motor thus, guarantee that motor provides best combustion efficiency, discharge best power output, reduced fuel consumption, improve the working power and the moment of torsion of motor, satisfied the national environmental protection laws and regulations requirement of increasingly stringent effectively.

Summary of the invention

The purpose of this utility model is in order to adapt to the development of electric-control diesel engine, especially at electric-control diesel engine monoblock pump type injection system, to propose a kind of floor electronic throttle assembly for diesel motor.

The technological scheme that the utility model adopted is: a kind of floor electronic throttle assembly for diesel motor, one position transducer assembly is installed in the pedal side, setting is connected with the sensor inner rotary body by the sensor rotatingshaft and makes the swing arm of solid of rotation with its rotation, the other end of swing arm is hinged on the guide wheel and guide wheel is positioned on the inclined-plane of base plate one end, constitutes pedal and drives the structure that the sensor inner rotary body rotates around its rotating shaft rotation, guide wheel along the rolling of base plate inclined-plane, swing arm; The brush that is provided with in the sensor is connected with solid of rotation and rotates with solid of rotation; The signal output of sensor is connected with the ECU ECU (Electrical Control Unit) of diesel engine, calculates the oil mass of demand by the fuel-flow control module according to accelerator open degree and current diesel engine speed, thereby realizes the adjusting of the power and the speed of a motor vehicle; On sensor respective base position, the accelerator open degree identification mechanism is installed, the alignment pin in the accelerator open degree identification mechanism for can move up and down under the pedal effect, automatically reset structure under action of reset spring; Reach at 100% o'clock at accelerator open degree, alignment pin in the pedal contact accelerator open degree identification mechanism, make its accelerator open degree of driver's perception reach 100%, when the anxious acceleration of needs, pushing down on the pedal fully, (relative its body under the pedal effect of the alignment pin in the accelerator open degree identification mechanism moves down at this moment, end in contact base plate is spacing to pedal down for it), sensor output signal strengthens, make the ECU unit of motor receive the start signal of E-Gas 130%, motor will be adjusted discharge time and emitted dose in 15s, make motor send the power bigger, guarantee the needs of short-term overload than nominal power.

The effect of described accelerator open degree identification mechanism is mainly finished by the action of alignment pin; Alignment pin is positioned at the step hole of its body of accelerator open degree identification mechanism, and the front and back boss that alignment pin had cooperates with the step hole of body, constitutes to alignment pin structure spacing and that under spring action alignment pin is resetted; And the locking ball that makes the alignment pin radial location is set, locking ball can be positioned at the locating slot of alignment pin under spring action.

The voltage signal parameter of described sensor output comprises: 1, throttle signal voltage 4, the all-range output voltage at initial position output voltage 2, Idle Switch state signal voltage jump value 3, place, intelligent power switch contact.

Concrete analysis: pedal rotary middle spindle, guide wheel and fixing bottom-plate are reserved triangle of the approximate formation of these three points of tie point of inclined-plane point of contact, movement arm and pedal, in the process that pedal is operated, because the tie point of pedal rotary middle spindle, movement arm and pedal is fixed, and the slip that guide wheel and base plate are reserved between the swash plate face constantly changes this subtriangular angle, finally causes forming between movement arm and pedal a corner that is not less than 60 °.The variation of this corner, make the sensing rotatingshaft pass motion to sensor, drive solid of rotation motion in the sensor, promptly driving brush is that rotate on the PCB real estate in the center of circle with the center sensor, and this substrate is to be made by the novel super wear-resistant conductive plastics that have the constant resistance rate.By changing the position of brush, cause the change in resistance that is printed on resistive layer on the PCB substrate, promptly constantly change the resistance value of output terminal and power cathode linkage section.After applying voltage between positive source and negative pole, because current constant, resistance variations causes the variation of output voltage, and output terminal and power-have just formed the voltage output signal of a variation between extremely like this, and this output voltage is directly proportional with the size of resistance.

The advantage that the utlity model has is:

(1) power character and the Economy of raising motor.The machine oil fuel consumption rate is low to moderate 0.45 ‰.

(2) discharging of reduction nitrogen oxide and smoke intensity.Adopt the E-Gas technology, can accurately fuel injection quantity be controlled in the proper range that is no more than the boundary of smoldering, regulate oil spout constantly according to engine operating condition simultaneously, thereby suppress smoke evacuation effectively.

(3) reduced noise.The conventional engines noise is big, but adopts the E-Gas technology, and the operational noise of diesel engine is effectively reduced.

(4) improve cold cranking capacity.Electronic control system can substitute the driver and carry out the start-up function of this trouble with the program of the best, make the diesel engine cold-starting easier.

(5) improve engine running stability.Adopt the diesel engine electronic throttle system, how no matter load increases and decreases, and can both guarantee under the engine idling condition with minimum stabilization of speed running, simultaneously for preventing tooth bar stuck " driving ", subtracting the oil simultaneously rapid cutoff high pump oil that resets, closes gas-entered passageway.This product is used on the diesel engine that is fitted with electronic fuel injection system, can be applied on motorbus, engineering machinery and the commercial car, is mainly used in the rotating speed of control motor.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the main body outline drawing of sensor unit among Fig. 1.

Fig. 3 is a PCB substrate cut-away view in the sensor unit among Fig. 1.

Fig. 4 is the structural representation of accelerator open degree identification mechanism among Fig. 1.

Among the figure: 1. pedal, 2. master reset torsion spring, 3. sensor rotatingshaft, 4. position transducer assembly, 5. pedal shaft, 6. controller base plate, 7. accelerator open degree identification mechanism, 8. motor connects connector assembly, 9. swing arm, 10. guide wheel, 11.PCB substrate, 12. solid of rotation, 13, brush, 14, boss, 15, back-up ring, 16, retaining spring, 17, locking ball, 18, accelerator open degree identification mechanism overcoat, 19, accelerator open degree identification mechanism body, 20, return spring, 21, alignment pin.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1, and with reference to Fig. 2,3, pedal 1 one ends are hinged on the base plate 6 through pedal shaft 5, sensor rotatingshaft 3 passes sensor unit 4, two swing arms 9 connect firmly with sensor rotatingshaft 3, in sensor unit 4, has the solid of rotation 12 that connects firmly with sensor rotatingshaft 3, and brush 13 connected with solid of rotation 12, has the elevation angle on the controller device base plate 6 and is 32 ± 2 inclined-plane, being hinged on two motion guide wheels 10 between the swing arm 9 is positioned on the inclined-plane of base plate 6, sensing rotatingshaft 3 is provided with master reset torsion spring 2, can automatically reset after being depressed by its pedal.When pedal 1 was stepped on, swing arm 9 rotated and makes motion guide wheel 10 produce slip on the inclined-plane of base plate 6.On sensor respective base position, accelerator open degree identification mechanism 7 is installed, reach at 100% o'clock at accelerator open degree, the shell of sensor 4 is run into the alignment pin of accelerator open degree identification mechanism 7, make its accelerator open degree of driver's perception reach 100%, when the anxious acceleration of needs, pushing down on the pedal fully, (relative its body under the pedal effect of the alignment pin in the accelerator open degree identification mechanism moves down at this moment, end in contact base plate is spacing to pedal down for it), sensor output signal strengthens, make the ECU unit of motor receive the start signal of E-Gas 130%, motor will be adjusted discharge time and emitted dose in 15s, make motor send the power bigger, guarantee the needs of short-term overload than nominal power.And on the vehicle of coupling automatic transmission case, can cooperate the overgear co-operation.

The utility model floor electronic throttle device, initial installing and locating is convenient, and the pedal operation mode is constant, versatility and interchangeability are good, owing to adopt macromolecule resin material to replace metallic material to manufacture pedal, improve pedal toughness, alleviate overall weight, manufacture cost is lower.

Among Fig. 2: A, B, C, D, E, F represent the interface definition of different output signals respectively.

Contact pin (PIN)	Functional definition (FUNCTION)	Colour of insulated conductor
			?A	Throttle signal output-OUT	Black-Black
?B	Signal power source ground wire-GND	White-White
			?C	The positive VCC of signal power source (5V)	Redness-Red
?D	Idling connection-IVSVNO	Green-Green
			?E	Idling is closed-N/A (sky)	Blueness-Blue
?F	The idling power supply just-IVSCOM	Yellow-Yellow

The contact pin each point is corresponding one by one among A, B among Fig. 3, C, D, E, F each point and Fig. 2, the spinning movement of sensing solid of rotation 12 drives the rotation of brush 13 on PCB substrate 1, its each point is in the corresponding different resistance value of diverse location, thereby make A, B, C, D, the different voltage signal of E, F output be delivered to the interface end of Fig. 2, final wire harness connects the ECU unit that connector assembly 8 feeds back to motor with signal by motor.Sensor PCB substrate 11 adopts super wear-resistant conductive plastics to replace fixed carbon resister, improves the wear-resisting property that becomes the resistance substrate.

Among Fig. 4, alignment pin 21 is fixed in the step hole of accelerator open degree identification mechanism body 19 by boss 14, before stationary positioned bearing pin 21, earlier return spring 20 is worn thereon, fixing then, because switch accelerator open degree identification mechanism body 19 inside have a step and bearing pin to top bar, and so just limit the position of return spring 20.Accelerator open degree identification mechanism body 19 is fixing by back-up ring 15 with overcoat 18.Accelerator open degree identification mechanism overcoat 18 is mainly used to limit 3 retaining springs 16 can not come off it from main body.Near the back-up ring place one locating slot is arranged in alignment pin 21 bottoms, it can position alignment pin 21.Be subjected to the compression of alignment pin at return spring 20,3 3mm locking balls 17 skid off in locating slot by the compressive force of retaining spring 16.When return spring 20 was compressed to limit position, this moment, the E-Gas aperture reached 130%.

Claims (2)

1, a kind of floor electronic throttle assembly for diesel motor, it is characterized in that: one position transducer assembly (4) is installed in pedal (1) side, be provided with by sensor rotatingshaft (3) and be connected with sensor inner rotary body (12) and make the swing arm (9) of solid of rotation (12) with its rotation, the other end of swing arm (9) is hinged on the guide wheel (10) and guide wheel (10) is positioned on the inclined-plane of base plate one end, formation is rotated around its rotating shaft (5) with pedal (1), and guide wheel (10) rolls along the base plate inclined-plane, swing arm (9) drives the structure that sensor inner rotary body (12) rotates; The brush (13) that is provided with in the sensor is connected with solid of rotation (12) and rotates with solid of rotation (12), and the signal output of sensor is connected with the ECU ECU (Electrical Control Unit) of diesel engine; Accelerator open degree identification mechanism (7) is installed on sensor respective base position, the alignment pin in the accelerator open degree identification mechanism (21) for can move up and down under the pedal effect, automatically reset structure under action of reset spring.

2, according to the described floor electronic throttle assembly for diesel motor of claim 1, it is characterized in that: the alignment pin (21) of described accelerator open degree identification mechanism (7) is positioned at the step hole of its body of accelerator open degree identification mechanism (19), the front and back boss that alignment pin (21) is had cooperates with the step hole of body, constitutes the structure spacing and that under return spring (20) effect alignment pin is resetted to alignment pin (21); And the locking ball (17) that makes the alignment pin radial location is set, locking ball (17) can be positioned at the locating slot of alignment pin under return spring (20) effect.

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