CN202656801U

CN202656801U - External tire pressure control device

Info

Publication number: CN202656801U
Application number: CN 201220331735
Authority: CN
Inventors: 谭志刚; 简晓春; 鲁娇娇; 黄程程
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2013-01-09
Anticipated expiration: 2022-07-10

Abstract

The utility model discloses an external tire pressure control device. The device comprises an inner tire and a hub and is characterized in that a micro air pump is arranged outside the hub; the inner tire is provided with an air inflation port and an air deflation port; the air discharging end of the micro air pump is communicated with the air inflation port through a first pipeline; the first pipeline is provided with a first electronic control one-way air valve; the air deflation port is provided with a second electronic control one-way air valve; the air deflation port is communicated with external environment through the second electronic control one-way air valve; a temperature sensor and an air pressure sensor are arranged in the inner tire; the temperature sensor, the air pressure sensor, the first electronic control one-way air valve, the second electronic control one-way air valve and the micro air pump are electrically connected with a singlechip; and the singlechip communicates with a vehicle-mounted electronic control unit (ECU). The external tire pressure control device has the advantages that the tire pressure of the inner tire of an automobile can be adjusted dynamically according to the change of the external temperature and air pressure, the accident of tire burst can be effectively avoided, the road holding performance of the tire of the automobile is improved, and the running safety of the automobile is guaranteed.

Description

The external tyre pressure control setup

Technical field

The utility model relates to a kind of car-mounted device, relates in particular to a kind of external tyre pressure control setup.

Background technology

The tire pressure of automobile inner tube has material impact to the adherence properties of motor tire, the wear intensity of tire, the road-holding property of automobile and the load-carrying ability of vehicle; Cause the factor of inner tube of a tyre tire pressure varies varied, the factors such as carload lot, ambient temperature, air pressure, road conditions, inner tube of a tyre air-tightness all can cause the inner-tube pressure to change, sometimes or even fluctuation of pressure occurs, these factors all can cause negative effect to the driving safety of automobile; Desirable inner tube of a tyre tire pressure should carry out dynamic adjustments according to factors such as carload lot, ambient temperature, road conditions, so just can make automobile obtain preferably road-holding property.

The utility model content

For the problem in the background technology, the utility model proposes a kind of external tyre pressure control setup, comprise the inner tube of a tyre and wheel hub, its improvement is: the lateral surface at wheel hub is provided with micro air pump; Be provided with inflation inlet and relief port on the inner tube of a tyre; By the first pipeline communication, be provided with the first automatically controlled Non-return air valve on the first pipeline between the outlet side of micro air pump and the inflation inlet; The relief port place is provided with the second automatically controlled Non-return air valve, and relief port is communicated with external environment by the second automatically controlled Non-return air valve; Inner tube of a tyre inside is provided with temperature sensor and baroceptor; Temperature sensor, baroceptor, the first automatically controlled Non-return air valve, the second automatically controlled Non-return air valve and micro air pump all are electrically connected with a micro controller system; Micro controller system and vehicle-mounted ECU communication connection.

Enter in the inner tube of a tyre for fear of dust or impurity, the utility model has also been done following improvement: also be provided with gas-filtering device on the first pipeline.

Useful technique effect of the present utility model is: can be according to the variation of external temperature, air pressure, and the inner tube of a tyre tire pressure of dynamic adjustments automobile is effectively avoided the accident of blowing out, and improves the adherence properties of motor tire, guarantees the safety of Vehicle Driving Cycle.

Description of drawings

Fig. 1, structural representation of the present utility model.

The specific embodiment

A kind of external tyre pressure control setup comprises the inner tube of a tyre 1 and wheel hub 2, and its improvement is: the lateral surface at wheel hub 2 is provided with micro air pump 3; Be provided with inflation inlet and relief port on the inner tube of a tyre 1; By the first pipeline communication, be provided with the first automatically controlled Non-return air valve 4 on the first pipeline between the outlet side of micro air pump 3 and the inflation inlet; The relief port place is provided with the second automatically controlled Non-return air valve 5, and relief port is communicated with external environment by the second automatically controlled Non-return air valve 5; The inner tube of a tyre 1 inside is provided with temperature sensor 6 and baroceptor 7; Temperature sensor 6, baroceptor 7, the first automatically controlled Non-return air valve 4, the second automatically controlled Non-return air valve 5 and micro air pump 3 five all are electrically connected with a micro controller system 8; Micro controller system 8 and vehicle-mounted ECU 9 communication connections.

Working process of the present utility model is: when the utility model was failure to actuate, the first automatically controlled Non-return air valve 4 and the second automatically controlled Non-return air valve 5 all were in off state; When Vehicle Driving Cycle comparatively hot when regional, because temperature is higher, gas in the inner tube of a tyre 1 is under the effect of the effect of expanding with heat and contract with cold, the inner tube of a tyre 1 tire pressure is raise, at this moment, micro controller system 8 collects temperature, barometric information (temperature in the inner tube of a tyre 1, barometric information are hereinafter to be referred as data in the tire) in the inner tube of a tyre 1 by temperature sensor 6 and baroceptor 7; Simultaneously, micro controller system 8 also communicates with vehicle-mounted ECU 9, call the ambient temperature and the barometric information (ambient temperature and barometric information are hereinafter to be referred as environmental data) that are collected by other onboard sensors among the ECU 9, micro controller system 8 determines whether that according to data in the tire needs carry out reduced pressure operation (during concrete operations to the inner tube of a tyre 1, can be in advance in the micro controller system 8 interior threshold values that arrange, namely try to achieve desirable tire pressure under the various temperature conditions according to experiment, and set up the mapping table of temperature conditions and desirable tire pressure, table look-up and determine whether tire pressure exceeds standard, exceed standard if there is tire pressure and then to carry out reduced pressure operation, if tire pressure is below standard, then carry out boost operations), after confirming to carry out reduced pressure operation, micro controller system 8 calculates the gas flow that needs are emitted according to data in the tire and environmental data from the inner tube of a tyre 1, the gas flowmeter of then emitting is as required calculated the unlatching duration (the mistake tolerance of the first automatically controlled Non-return air valve 4 and the second automatically controlled Non-return air valve 5 and the output of micro air pump 3 are known definite value) of the second automatically controlled Non-return air valve 5, last micro controller system 8 operations the second automatically controlled Non-return air valve 5 is opened, the inner tube of a tyre 1 is carried out step-down, after the opening time of the second automatically controlled Non-return air valve 5 reaches requirement, close the second automatically controlled Non-return air valve 5; When Vehicle Driving Cycle comparatively cold when regional, because temperature is lower, gas in the inner tube of a tyre 1 is under the effect of the effect of expanding with heat and contract with cold, the situation that the inner tube of a tyre 1 tire pressure deficiency can occur again, at this moment just need to carry out boost operations to the inner tube of a tyre 1, at this moment, micro controller system 8 determines that according to data in the tire needs are filled with the gas flow in the inner tube of a tyre 1, and calculate the unlatching duration (also can regulate according to atmospheric pressure value the work duration of micro air pump 3) of micro air pump 3, at last, micro controller system 8 control micro air pumps 3 start, open simultaneously the first automatically controlled Non-return air valve 4, micro air pump 3 is inflated in the inner tube of a tyre 1, after the starting duration of micro air pump 3 meets the demands, closes micro air pump 3 and the first automatically controlled Non-return air valve 4;

Because micro air pump 3 is to get gas from the outside, dust and impurity in environment enter in the inner tube of a tyre 1, and the utility model also is provided with gas-filtering device at the first pipeline, in order to blocks dust and impurity.

For device is shielded, the utility model also corresponding position on wheel hub 2 is provided with screened housing, and micro air pump 3, the first automatically controlled Non-return air valve 4 and the second automatically controlled Non-return air valve 5 all place in the space between wheel hub 2 and the screened housing.

Claims

1. an external tyre pressure control setup comprises the inner tube of a tyre (1) and wheel hub (2), it is characterized in that: the lateral surface at wheel hub (2) is provided with micro air pump (3); The inner tube of a tyre is provided with inflation inlet and relief port on (1); By the first pipeline communication, be provided with the first automatically controlled Non-return air valve (4) on the first pipeline between the outlet side of micro air pump (3) and the inflation inlet; The relief port place is provided with the second automatically controlled Non-return air valve (5), and relief port is communicated with external environment by the second automatically controlled Non-return air valve (5); The inner tube of a tyre (1) inside is provided with temperature sensor (6) and baroceptor (7); Temperature sensor (6), baroceptor (7), the first automatically controlled Non-return air valve (4), the second automatically controlled Non-return air valve (5) and micro air pump (3) five all are electrically connected with a micro controller system (8); Micro controller system (8) and vehicle-mounted ECU (9) communication connection.

2. external tyre pressure control setup according to claim 1 is characterized in that: also be provided with gas-filtering device on the first pipeline.