CN2462370Y

CN2462370Y - Digit module controlled gasoline engine operating mode device

Info

Publication number: CN2462370Y
Application number: CN01201544U
Authority: CN
Inventors: 高世伦; 李金生; 熊志刚; 夏金辉
Original assignee: SHENFENG ENGINE CO Ltd YINGCHENG CITY
Current assignee: SHENFENG ENGINE CO Ltd YINGCHENG CITY
Priority date: 2001-01-18
Filing date: 2001-01-18
Publication date: 2001-11-28
Anticipated expiration: 2011-01-18
Also published as: WO2002064962A1

Abstract

The utility model belongs to a digit module controlling gasoline engine operating mode device, which relates to the control technique of a gasoline engine operating mode. Three kinds of operating modes of the opening position of a throttle, the rotating speed of an engine and the temperature of a cylinder end are used as input signals of the utility model, and two signals for controlling the engine operating mode, namely, a control signal of a variable admission device and a control signal of an advance angle of ignition are exported by the comparison and the calculation of a fixed program in a CPU to cause the advance angle of ignition to be optimized to be most suitable for operating mode of the time and to cause variable admission quantity to be optimized to optimum lean mixture operating state. The utility model causes the gasoline engine to achieve the optimum advance angle of ignition and the optimum air-fuel ratio to obtain easily starting the gasoline engine, when the gasoline engine works, the gasoline engine can be the operating mode of optimization, and the precondition that the normal power performance of the gasoline engine can be assured is realized; the target is realized in that the oil consumption of the gasoline engine is reduced, and the economic index of the gasoline engine is enhanced.

Description

A kind of device of digital module control petrol engine operating mode

The utility model relates to petrol engine operating mode control technology.Specifically a kind of variable air inlet regulating device of controlling under the various working conditions of motorcycle engine.

In the prior art, petrol engine air, fuel oil supply system also adopt Manufacturing Technology for Carburetors in a large number, but two weak points of main existence on the performance, the one, air-fuel ratio can not the adaptive engine working conditions change, the 2nd, the variation that ignition advance angle can not the adaptive engine operating mode and changing, thereby engine consumption and other performance lag behind the electric-controlled injection technology.In order to improve the performance of carburetor air feed, oil supply system, some improvement technology to carburetor air feed, fuel feeding technology have appearred in the carburetor lean mixture limit control theory based on later 1970s proposes.For example notification number is 1018228 patented technology.This technology with the tach signal of the load signal of throttle position switch and firing system as input signal, regulate the Numerical control valve of additional-air inlet by system controlled by computer, realization is done self-adapting closed loop control to residing different operating environment of engine and the deviation that causes of processing abrasion, makes engine often be in the optimization operation conditions of lean mixture work.This technology has only been done control to air-fuel ratio, ignition advance angle during not to different air-fuel ratio is controlled, ignition advance angle is the important parameter that influences the engine economical operation, lack the control that ignition advance angle and air-fuel ratio adapt, its as a result engine consumption can only reach the level of average reduction 5%-8%, the advance of this technology and applicability are a greater impact.The input control of this technology only is provided with two parameters, and promptly two parameters in engine speed and valve position are comprehensive inadequately to the reflection of engine operating condition.The throttle position signal of this technology is divided into eight sections and picks, and the precision of input signal is not high, and the control signal of the required precision of ignition advance angle can not be provided.The additional-air inlet Numerical control valve of this technology is the multichannel solenoid valve, and air inflow is that discontinuous 16 sections rank become.Based on above problem, this The Application of Technology is restricted.In the prior art, on motorcycle engine, it obtains Engine Inlet Temperature by 5 sensors, the duty parameter of the crank phase of rotating speed, cylinder head temperature, throttle valve position and the environmental parameter of atmospheric pressure, by two control signals of output after the microcomputer computing, the unlatching moment and the opening time of control gasoline ejector, thereby the optimal air-fuel ratio of acquisition engine, reduce oil consumption, reduce discharge capacity.But manufacturing cost is higher, the one, and the cost of sensor device, the 2nd, the fuel injector cost, the higher ratio of performance to price that reduces this technology of cost is the main reason of this technology widespread use of overslaugh.This technology has begun to use on the petrol engine of multi-cylinder, big discharge capacity at present, because cost is difficult for the problem of reduction, is particularly also seldom using on the motorcycle on the engine of single cylinder, little discharge capacity.

The purpose of this utility model is at the drawback of prior art, proposes a kind ofly to reach the discharging that cuts down the consumption of energy, to be easy to the engine transformation with the variable air inlet regulating device of digital module control engine under various working conditions, and purpose with low cost.

Realize that concrete technical measures of the present utility model are devices of this digital module control petrol engine operating mode, at least comprise digital control module, the variable air inlet control device, petrol engine, autobicycle gasoline throttle grip, load sensing apparatus, carburetor, air cleaner etc.; Its autobicycle gasoline throttle grip passes apparatus by load and is connected with the A end of digital control module CPU, engine rotational speed signal is connected with the B end of digital control module CPU, the cylinder head temperature signal is connected with the C end of digital control module CPU, the output terminal E of digital control module CPU is connected in the servomotor of variable air inlet control device, and be transmitted to connecing between gas seat and the air cleaner of carburetor two ends by variable air intake device, be communicated with engine inlets; Above-mentioned described load sensor passes to be put, its throttle drag-line is filled out the line potentiometer by pull bar and precision and is connected, the original state of accelerator open degree is regulated fixing by the position adjustments bolt, the output terminal of accurate linear potentiometer is connected with the A of digital control module CPU end, and pull bar in the load sensing apparatus and accurate linear potentiometer are fixed on the vehicle frame with support; Above-mentioned described variable air inlet control device is a guiding valve, and its spool is connected with the servomotor rotating shaft, and the channel interface at valve body two ends is connected on the gas outlet of offering the air cleaner lower end, and the other end is connected engine and connects on the inlet channel of gas seat.

The utility model has demonstrated superiority fully in bench test:

The effect that 1, remarkable reduction oil consumption is arranged

Through a large number of experiments show that oil consumption can on average reduce by 25%.Significantly reducing oil consumption mainly is to have adopted more comprehensive control system, the particularly dynamic change of control ignition angle of advance.

The effect that 2, tangible reduction engine emission is arranged.

According to carburetor lean mixture limit control theory, adopted the ignition advance angle control that adapts with air-fuel ratio, make the mixture combustion in the cylinder more complete, obviously reduced the exhaust emissions of engine.

3, easily to existing engine, particularly motorcycle engine is transformed.

The throttle opening position signalling of continuous stepless is searched device and is very easily transformed on motorcycle; Ignition and CPU are solidificated on the same module simultaneously, and the variable air intake device volume is little, do not increase installing space substantially.

4, with low cost

Manufacturing cost is very low in force, does not influence former engine price substantially, and after improving the ratio of performance to price of engine is improved greatly.

Further use description of drawings structure of the present utility model below.

Accompanying drawing 1 is a logic diagram of the present utility model;

Accompanying drawing 2 is the load sensor apparatus structure synoptic diagram in the accompanying drawing 1;

Accompanying drawing 3 is variable air inlet control structure synoptic diagram in the accompanying drawing 1.

Three duty parameter input of the utility model engine, be load sensing apparatus letter 5, engine rotational speed signal 6, cylinder head temperature signal 7, all carry out computing by digital control module CPU1, and output ignition advance angle signal 11 and variable air inlet control device signal 2.Obtaining of the signal parameter of (seeing accompanying drawing 1) load sensing apparatus 5, rotation by autobicycle gasoline throttle grip 4, drive throttle drag-line 18, spur smart linear potentiometer 20 synchronously with pull bar, produce continuous electric signal, and be input to the A end of digital control module CPU1, the initial adjustment of accelerator open degree by extension line 21, fixing by 19 adjustings of position adjustments bolt, whole load sensor is fixed on the vehicle frame by support 22 (sees accompanying drawing 2); The parameter acquiring of engine speed 6 is the triggering ignition signals that utilize the magneto generator on the engine 3 to produce, and the B end of input column of figure control module CPU1; Obtaining of cylinder head temperature signal 7 is to utilize to embed near the temperature sensor of cylinder head spark plug, and is input to the C end of digital molded module CPU1.Three engine that obtains 3

duty parameter signals

5,6,7, through digital control module CPU1 comparison operation after D end and E end output

ignition advance angle

11 and 2 two control signals of variable air intake device.Ignition system and digital control module CPU1 that the utility model relates to solidify on same chip.Simultaneously, variable air inlet control device 2 in the setting of carburetor 9 one ends, by a servomotor 14, a slide valve 12 is formed, (seeing accompanying drawing 3) valve rod 13 is by position transducer 15 and servomotor 14 actions, and the

interface

16,17 at valve body 12 two ends is connected to the gas outlet of air cleaner 8 lower ends and engine 3 and connects on the inlet channel on the gas seat 10.

The utility model should be set up digital model and be solidified in CPU according to the optimal operating parameter of petrol engine under different working conditions in force, and the variable air inlet control device adopts the alumina based material casting.

Claims

1, a kind of device of digital module control petrol engine operating mode, which comprises at least digital control module, the variable air inlet control device, petrol engine, the autobicycle gasoline throttle grip, the load sensing apparatus, carburetor, air cleaner, it is characterized in that the motorcyclist handle is connected with the A end of digital control module CPU by the load sensing apparatus, engine rotational speed signal is connected with the B end of digital control module CPU, the cylinder head temperature signal is connected with the C end of digital control module CPU, the output terminal D of digital control module CPU is connected with the engine ignition head by ignition, the output terminal E of digital control module CPU is connected in the servomotor input end of variable air inlet control device, and connects on the inlet channel of gas seat by air cleaner and the engine that the variable air inlet control device is transmitted to the carburetor two ends.

2, the device of a kind of digital module control petrol engine operating mode according to claim 1, it is characterized in that the throttle drag-line on the load sensing apparatus is connected with accurate linear potentiometer by pull bar, the original state of accelerator open degree is regulated fixing by the position adjustments bolt.Pull bar in the load sensing apparatus and accurate linear potentiometer are fixed on the vehicle frame with support.

3, the device of a kind of digital module control petrol engine operating mode according to claim 1, it is characterized in that the variable air inlet control device comprises a guiding valve and a servomotor, its spool is connected with the servomotor rotating shaft, the channel interface at valve body two ends is connected on the gas outlet of offering the air cleaner lower end, and the other end is connected engine and connects on the inlet channel of gas seat.