CN110145402A

CN110145402A - Engine exhaust throttle system

Info

Publication number: CN110145402A
Application number: CN201810160390.7A
Authority: CN
Inventors: 罗敏贤; 莫嘉林
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-02-13
Filing date: 2018-02-13
Publication date: 2019-08-20

Abstract

The present invention is a kind of engine exhaust throttle system, the system connects installation electric control exhaust throttler valve on the tailpipe of silencer, control system can be according to engine rotational speed signal, reed time controll throttle motor works to adjust the aperture of air throttle, so that the exhaust passage sectional area of electric control exhaust throttler valve can increase as the revolving speed of engine increases, exhaust back pressure can reduce as the revolving speed of engine increases, reduce loss power when engine forced exhaust so as to mention, promotes the output power of engine.

Description

Engine exhaust throttle system

Technical field

The present invention relates to a kind of engine exhaust air throttles that can lead to sectional area with the high low adjustment exhaust pipe of engine speed System.

Background technique

It is well known that cylinder capacity be with revolving speed increases and time for increasing, and being vented every time also with The reduction of the raising of revolving speed, this requires exhaust back pressures to reduce with the raising of revolving speed, in favor of reduce forced exhaust Consumed power.

Currently, well known engine exhaust system back pressure is set with following two；

1. using constant exhaust pipe ventilation sectional area technology, torque when which needs to take into account low engine speed is set Output the phenomenon that raising there is exhaust back pressure with engine load increase, thus inhibits engine in big load The defect that torque output is promoted.

2. using two-stage adjust exhaust pipe sectional area technology, the technology be by the way that relief valve is arranged in exhaust pipe, Exhaust back pressure opens bypass air flue when being higher than setting value, increase exhaust pipe air passage sectional area；Because needing to take into account low engine speed When torque output, have biggish ventilation sectional area when admittedly needing to meet using relief valve the big load of engine, there is because Relief valve generates additional exhaust resistance, causes engine that can't sufficiently promote the defect of output torque in big load.

3. using two-stage adjust exhaust pipe sectional area technology, the technology be by the way that solenoid valve is arranged in exhaust pipe, When the big load of engine, second exhaust tail pipe is opened by solenoid valve, increases the exhaust sectional area of exhaust passage, by exhaust system Generated exhaust back pressure minimizes, thus output torque when sufficiently promoting the big load of engine.Although the technology is far excellent In the exhaust pipe ventilation sectional area technology that setting is constant, but there are still when engine idling, exhaust back pressure is too low；Solenoid valve will When nearly opening second exhaust pipe, exhaust back pressure is excessively high；When solenoid valve has just opened second exhaust pipe, exhaust back pressure is too low；Engine Busy hour, the excessively high defect of exhaust back pressure.

Summary of the invention

The promotion of output torque when in order to not only be conducive to low engine speeds, but also can increase and reduce with engine speed Exhaust back pressure, to be conducive to increase output torque, the present invention provides a kind of engine exhaust throttle system, which can be with Engine speed variation, speed variation, accelerator pedal position variation, control system ECU pass through engine speed sensor, speed Sensor, accelerator pedal position sensor by after engine speed, speed, accelerator pedal position information to electric control exhaust air throttle Motor issues instruction, and throttle motor works immediately, air throttle is adjusted to corresponding position, and pass through throttle position sensor Throttle position information is transmitted to control system ECU, so as to adjust the sectional area of exhaust passage, to meet the exhaust need of engine It asks.

The technical solution adopted by the present invention to solve the technical problems is saved by the tailpipe of exhaust silencer, exhaust Air valve, control system ECU, engine speed sensor, vehicle speed sensor, accelerator pedal position sensor composition.Exhaust section Air valve contains throttle valve body, air throttle, throttle position sensor, throttle motor；The tailpipe of silencer goes out Installation connection electric control exhaust throttler valve at port；Air throttle is located on the exhaust passage of exhaust throttle valve, and air throttle is by saving Valve motor driven, throttle motor are controlled by control system ECU, and the shaft of air throttle connects throttle position sensor, section Throttle position information is transmitted to control system ECU by valve position sensor, and control system ECU is transmitted according to throttle position In place whether information determine driving motor working condition；Air throttle is equipped with basic venthole, substantially logical even if closed throttle Stomata is still able to satisfy the requirement of the exhaust of engine idling；When closed throttle, the sectional area of the air passage of exhaust throttle valve It is minimum；When exhaust throttle standard-sized sheet, the sectional area of the air passage of exhaust throttle valve is maximum.

It is an advantage of the invention that making the exhaust back pressure of engine can reduce with the raising of revolving speed, can both make in idling It is not discharged outside cylinder with exhaust gas with the live gas for entering cylinder when low speed, and can be increased with revolving speed and exclude the exhaust gas in cylinder More thoroughly, air inlet it is more abundant, not only improve and reduce exhaust advance angle not only to increase the effective working stroke of piston, but also be conducive to subtract Power consumed by few forced exhaust.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples.

Fig. 1 is schematic diagram of the invention.

1. engine in figure, 2. engine speed sensors, 3. vehicle speed sensor, 4. tailpipes, 5. throttle positions Sensor, 6. basic ventholes, 7. air throttles, 8. throttle motors, 9. control system ECU, 10. exhaust silencers, 11. is automatically controlled Exhaust throttle valve body, 12. accelerator pedal position sensors.

Specific embodiment

In Fig. 1, installation electric control exhaust throttler valve, electric control exhaust section are connect on the tailpipe (4) of silencer (10) The structure & working mechanism of the automatically controlled throttle gate valve of the structure of air valve, working principle and gasoline engine is essentially identical；It is automatically controlled Exhaust throttle valve is by electric control exhaust throttle valve body (11), air throttle (7), throttle position sensor (5), air throttle electricity Machine (8) composition；The air inlet of electric control exhaust throttle valve body (11) is communicated with tailpipe (4), electric control exhaust throttle valve body (11) gas outlet leads directly to atmosphere, and air throttle (7), throttle position sensing are equipped on electric control exhaust throttle valve body (11) Device (5), throttle motor (8)；Air throttle (7) is equipped with basic venthole (6)；Throttle motor (8) is by control system ECU (9) it controls, throttle position sensor (5), engine speed sensor (2), vehicle speed sensor (3), accelerator pedal position pass Sensor (12) is respectively by throttle position information, engine speed information, vehicle speed information, accelerator pedal position information conveyance to control System ECU (9) processed.

1. when engine start, since revolving speed is low, discharge amount of exhaust gas is small, basic venthole (6) can satisfy exhaust requirements.

2. when engine is in idling, since the exhaust valve opening time of cylinder is longer, at this point, control system ECU (9) Receive throttle position information, the hair that throttle position sensor (5), engine speed sensor (2), vehicle speed sensor transmit After motivation rotary speed information, vehicle speed information, throttle motor (8) work is instructed immediately, air throttle (7) are opened and arrive corresponding position It sets, to improve exhaust back pressure, the live gas into cylinder be discharged will not with exhaust gas.

3. the revolving speed with engine increases, the exhaust valve opening time of cylinder shortens, exhausted air quantity increases in discharge cylinder, At this point, control system ECU (9) receive throttle position sensor (5), engine speed sensor (2), vehicle speed sensor (3), Throttle position information that accelerator pedal position sensor (12) transmits, engine speed information, vehicle speed information, gas pedal position After confidence breath, throttle motor (8) work is instructed immediately, air throttle (7) are opened and arrive corresponding position, and as engine turns Speed is higher, and the aperture of air throttle (7) is bigger.The present invention is compared with the changeless exhaust system of exhaust passage sectional area: hair The exhaust resistance of motivation exhaust throttle valve system can be increased with the revolving speed of engine and it is opposite reduce, exhaust back pressure can be with The revolving speed of engine increases and reduces relatively, to make the free exhaust amount of cylinder can be opposite with the raising of the revolving speed of engine Increase, forced exhaust amount can reduce relatively as engine speed increases, and power is also with hair consumed by forced exhaust Motivation revolving speed increases and reduces relatively, and relatively more thoroughly, the air inlet of cylinder is opposite for exhaust gas discharge of the cylinder under each load condition More sufficiently.

Claims

1. a kind of engine exhaust throttle system, the system is by the tailpipe of silencer, electric control exhaust throttler valve, control System ECU, engine speed sensor, vehicle speed sensor, accelerator pedal position sensor composition；It is characterized in that: tailpipe Gas outlet at installation connection electric control exhaust throttler valve；Electric control exhaust throttler valve contains throttle valve body, in throttler valve Air throttle is housed in intracorporal exhaust steam passage, throttle motor, throttle position pressure difference transmitter are housed outside throttle valve body；Solar term The intracorporal exhaust steam passage air inlet of gate valve is communicated with tailpipe, and the exhaust steam passage gas outlet in throttler valve body leads directly to atmosphere； Air throttle is equipped with basic venthole；Throttle motor can drive air throttle to rotate under the control of control system ECU；Air throttle The drive position information of air throttle is fed back to control system ECU by position sensor；When engine stop, closed throttle, hair Motivation idling subject throttle aperture is minimum, and engine peak speed subject throttle aperture is maximum.