CN101498597A - Method for displaying automobile oil consumption - Google Patents
Method for displaying automobile oil consumption Download PDFInfo
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- CN101498597A CN101498597A CNA2009100612030A CN200910061203A CN101498597A CN 101498597 A CN101498597 A CN 101498597A CN A2009100612030 A CNA2009100612030 A CN A2009100612030A CN 200910061203 A CN200910061203 A CN 200910061203A CN 101498597 A CN101498597 A CN 101498597A
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Abstract
The invention discloses a method for displaying automobile oil consumption, which belongs to the technical field of automobile design and comprises the following steps: the ECU calculates instantaneous oil consumption information through sampling information of a sensor, the ECU transmits the calculated instantaneous oil consumption information to the instrument single chip microcomputer through a controller area network CAN bus, the instrument single chip microcomputer calculates the received instantaneous oil consumption information according to a preset formula to obtain a small oil consumption value and a statistical oil consumption value, and the instrument single chip microcomputer stores and instructs an LCD display screen to display the calculated small oil consumption value and the statistical oil consumption value. By applying the technical scheme of the invention, the subtotal oil consumption value and the statistical oil consumption value can be stored and accurately displayed under the condition of not increasing the cost and changing hardware.
Description
Technical field
The present invention relates to automobile technical field, particularly relate to a kind of method of vehicle oil wear indication.
Background technology
Referring to the patent No. in the prior art be 02212750, name is called the disclosed technical scheme of patent of " a kind of automobile fuel consumption table ": engine electric-controlled unit ECU and logical circuit is the whole and composite pulse signal that obtains directly passes to consumption indicator with lead and controls consumption indicator and rotate, and there is following defective in this mode:
1) signal is disturbed easily, and pointing accuracy is poor;
2) can only show fuel consumption information, can not store fuel consumption information;
3) the consumption indicator design is complicated, and cost is improved;
4) take cab space, the bad layout of consumption indicator;
5) She Ji instrument is determined once design, and content displayed is just fixing, and hardware can not be changed.
Summary of the invention
The objective of the invention is provides a kind of method of vehicle oil wear indication in order to overcome the deficiency of above-mentioned background technology, is not increasing under the situation that cost do not change hardware, can preserve and accurately shows subtotal fuel consumption values and statistics fuel consumption values.
The method of a kind of vehicle oil wear indication provided by the invention, may further comprise the steps: engine electric-controlled unit ECU calculates instantaneous fuel consumption information by the sample information of sensor, the instantaneous fuel consumption information that ECU will calculate is given the instrument single-chip microcomputer by the CAN of controller local area network bus transfer, the instrument single-chip microcomputer calculates subtotal fuel consumption values and statistics fuel consumption values according to predefined formula to the instantaneous fuel consumption information of receiving, the instrument single-chip microcomputer is preserved and the indication LCD display shows subtotal fuel consumption values and the statistics fuel consumption values that calculates.
In technique scheme, the sample information of described sensor comprises accelerator pedal position, engine speed, moment of torsion, charge flow rate, air-distributor pressure.
In technique scheme, the instantaneous fuel consumption information that ECU will calculate periodically sends on the CAN bus with the message form.
In technique scheme, the formula of described predefined calculating subtotal fuel consumption values is: will add up from the fuel consume numerical value in zero clearing time last time to the unit interval the Information Monitoring time and obtain the subtotal fuel consumption values.
In technique scheme, the formula of described predefined counting statistics fuel consumption values is: will add up from the fuel consume numerical value of instrument in the unit interval conduction time to Information Monitoring time first and obtain adding up fuel consumption values.
Do not increase any hardware in the technical scheme of the present invention, on the basis of existing equipment, carried out function expansion, do not increase cost; Adopt CAN bus transfer fuel consumption information, avoided the distortion in the information transfer process, instability, untimely; Utilize LCDs accurately to show subtotal fuel consumption values and statistics fuel consumption values, come into plain view; The instrument single-chip microcomputer is preserved subtotal fuel consumption values and the statistics fuel consumption values that calculates; help the record and the management of fuel cost; satisfy the demand that the driver grasps and controls the accurate distributive value of engine; make things convenient for the driver to monitor the regularly fuel consumption of spacing of automobile at any time; form economic custom of driving, the maintenance of vehicle, the saving of operation cost, the protection of environment are had positive role.
Description of drawings
Fig. 1 is the method step process flow diagram of the embodiment of the invention.
Embodiment
The hardware that the embodiment of the invention relates to comprises: field bus instrument, CAN-BUS bus, engine electric-controlled unit ECU.Utilize the instantaneous oil consumption of CAN bus transfer engine, utilize field bus instrument to calculate and the storage fuel consumption information, and utilize the lattice liquid crystal display screen on the field bus instrument to show fuel consumption values.The method of a kind of vehicle oil wear indication that the embodiment of the invention provides referring to shown in Figure 1, may further comprise the steps:
Step 101: engine electric-controlled unit ECU calculates instantaneous fuel consumption information by the sample information of sensor, and is concrete, and the sample information of sensor comprises accelerator pedal position, engine speed, moment of torsion, charge flow rate, air-distributor pressure etc.;
The instantaneous fuel consumption information that step 102:ECU will calculate is given the instrument single-chip microcomputer by the CAN of controller local area network bus transfer, and concrete, the instantaneous fuel consumption information that ECU will calculate periodically sends on the CAN bus with the message form;
Step 103: the instrument single-chip microcomputer calculates subtotal fuel consumption values and statistics fuel consumption values according to predefined formula to the instantaneous fuel consumption information of receiving, concrete, the formula of predefined calculating subtotal fuel consumption values is: will add up from the fuel consume numerical value in zero clearing time last time to the unit interval the Information Monitoring time and obtain the subtotal fuel consumption values; The formula of predefined counting statistics fuel consumption values is: will add up from the fuel consume numerical value of instrument in the unit interval conduction time to Information Monitoring time first and obtain adding up fuel consumption values;
Step 104: the instrument single-chip microcomputer is preserved and the indication LCD display shows subtotal fuel consumption values and the statistics fuel consumption values that calculates.
Specifically describe the principle of the embodiment of the invention below.
(1) determining of the instantaneous oil consumption of engine: engine electric-controlled unit ECU calculates instantaneous fuel consumption information by decision injection advance angle, oil spout step and fuel injection pulsewidths such as monitoring accelerator pedal position, engine speed, moment of torsion, charge flow rate, air-distributor pressures.Owing to select for use engine A, present embodiment to select the engine electric-controlled unit ECU of A company for use in actual production process, this engine electric-controlled unit ECU is a common-rail injection system, and sends instantaneous fuel consumption information according to agreement to instrument.Concrete, it is as shown in table 1 that instantaneous fuel consumption information is carried out parameter-definition.
| PGN | The transmission cycle | Byte | Technical parameter | Information |
| 65282 | 200ms | Byte3～byte4 | Factor：1/10240ml Offset：0 Range：0～6.2749ml | Instantaneous oil consumption |
Table 1
(2) transmission of fuel consumption information: the embodiment of the invention utilizes the CAN-BUS bus that connects between engine electric-controlled unit ECU and the field bus instrument to transmit instantaneous fuel consumption information.The instantaneous fuel consumption information that engine electric-controlled unit ECU comes out aforementioned calculation periodically is dealt on the CAN bus with the message form.CAN-BUS transmits instantaneous fuel consumption information to instrument CAN transceiver in the mode of differential signal.The design of CAN-BUS must meet the regulation of J1939 agreement.According to various CAN transceivers being carried out performance test and price compares, the embodiment of the invention is selected high-speed CAN transceiver TJA1050 for use, and the concrete interface definition of TJA1050 is as shown in table 2.
Table 2
The TJA1050 working temperature is-40 ℃～+ 125 ℃, supports differential transmission and received signal, peak transfer rate 1Mb/S.CAN transceiver TJA1050 optionally receives the differential signal on the CAN bus and converts it into the TTL signal according to the setting of CAN controller.Agreement during according to design, the instantaneous fuel consumption information that ECU transmits are the signals that instrument CAN controller needs, and enter ECU so instantaneous fuel consumption information is received and is converted into the TTL signal by instrument CAN transceiver, and the CAN controller is integrated among the instrument ECU.
(3) reception of fuel consumption information and calculating: instrument receives the message information of instantaneous oil consumption, according to the different instantaneous fuel consumption information that different engine electric-controlled systems provide, utilizes predefined computing formula to carry out the calculating of oil consumption.The chip of selecting for use in the embodiment of the invention instrument single-chip microcomputer is MB90F428GB, and this chip is according to predefined computing formula:
The instantaneous fuel consumption information that receives is calculated, drawn subtotal fuel consumption values and statistics fuel consumption values.For example the information of certain controller transmission is: the oil consumption total amount of every 200ms is ai, and then the subtotal fuel consumption values computing formula in a certain moment is:
In the following formula, Fconta is statistics fuel consumption values (unit is L), and ai is the fuel consume numerical value of gathering from bus in a certain moment, and t is the time (unit is ms) when beginning to the collection fuel consumption information from last zero clearing.
It should be noted that: t can zero clearing when calculating the subtotal fuel consumption values, begins to calculate from the last zero clearing time; T can not zero clearing during the counting statistics fuel consumption values, and switching on first from instrument begins to calculate.
(4) storage of subtotal fuel consumption values and statistics fuel consumption values: field bus instrument single-chip microcomputer chips MB90F428GB is in the process of calculating subtotal fuel consumption values and statistics fuel consumption values, and MB90F428GB in time is sent to the subtotal fuel consumption values of calculating among 8 bit shift register/latch HEF4094BT with the statistics fuel consumption values and stores.
(5) demonstration of subtotal fuel consumption values and statistics fuel consumption values: instrument ECU sends to the liquid crystal display driving circuit with subtotal fuel consumption values and the statistics fuel consumption values that calculates, and the liquid crystal display driving circuit drives liquid crystal display and shows subtotal fuel consumption values and statistics fuel consumption values.The embodiment of the invention selects dot lcd to shield to show subtotal fuel consumption values and statistics fuel consumption values for use, and it is as shown in table 3 that this dot lcd shields concrete parameter.
| Project | Technical parameter |
| Liquid crystal display viewable portion size | 108mm×26.5mm |
| Number of picture elements | 256×64 |
| Pixel size | 0.35mm×0.35mm |
Table 3
When the driver need understand fuel consumption information, forward car key to the ON shelves, weak point clicks the turn-knob that the instrument LCDs is kept right below then, what this moment, LCDs showed is the subtotal fuel consumption values and adds up fuel consumption values, the subtotal fuel consumption values is shown as five integers and adds a decimal, unit pins above-mentioned turn-knob of keeping right and surpasses 2s, the zero clearing of subtotal fuel consumption values for rising; The statistics fuel consumption values is shown as six integers, and unit is for rising, and the statistics fuel consumption values can not zero clearing.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (5)
1, a kind of method of vehicle oil wear indication, it is characterized in that, may further comprise the steps: engine electric-controlled unit ECU calculates instantaneous fuel consumption information by the sample information of sensor, the instantaneous fuel consumption information that ECU will calculate is given the instrument single-chip microcomputer by the CAN of controller local area network bus transfer, the instrument single-chip microcomputer calculates subtotal fuel consumption values and statistics fuel consumption values according to predefined formula to the instantaneous fuel consumption information of receiving, the instrument single-chip microcomputer is preserved and the indication LCD display shows subtotal fuel consumption values and the statistics fuel consumption values that calculates.
2, the method for vehicle oil wear indication as claimed in claim 1 is characterized in that, the sample information of described sensor comprises accelerator pedal position, engine speed, moment of torsion, charge flow rate, air-distributor pressure.
3, the method for vehicle oil wear indication as claimed in claim 1 is characterized in that, the instantaneous fuel consumption information that ECU will calculate periodically sends on the CAN bus with the message form.
4, the method for vehicle oil wear indication as claimed in claim 1, it is characterized in that the formula of described predefined calculating subtotal fuel consumption values is: will add up from the fuel consume numerical value in zero clearing time last time to the unit interval the Information Monitoring time and obtain the subtotal fuel consumption values.
5, the method for vehicle oil wear indication as claimed in claim 1, it is characterized in that the formula of described predefined counting statistics fuel consumption values is: will add up from the fuel consume numerical value of instrument in the unit interval conduction time to Information Monitoring time first and obtain adding up fuel consumption values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100612030A CN101498597A (en) | 2009-03-20 | 2009-03-20 | Method for displaying automobile oil consumption |
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| CNA2009100612030A CN101498597A (en) | 2009-03-20 | 2009-03-20 | Method for displaying automobile oil consumption |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852183A (en) * | 2012-09-07 | 2013-01-02 | 三一重机有限公司 | Excavator oil consumption display control system, control method thereof, and excavator |
| CN108917868A (en) * | 2018-07-21 | 2018-11-30 | 江苏恩达通用设备有限公司 | A kind of fuel consumption remote monitoring system of engine |
| CN111660807A (en) * | 2019-03-06 | 2020-09-15 | 上海欧菲智能车联科技有限公司 | Oil mass data processing method, processing device, medium and vehicle |
| CN112507518A (en) * | 2020-11-09 | 2021-03-16 | 东风汽车集团有限公司 | User comprehensive oil consumption calculation method and device |
-
2009
- 2009-03-20 CN CNA2009100612030A patent/CN101498597A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852183A (en) * | 2012-09-07 | 2013-01-02 | 三一重机有限公司 | Excavator oil consumption display control system, control method thereof, and excavator |
| CN102852183B (en) * | 2012-09-07 | 2016-01-20 | 三一重机有限公司 | A kind of excavator oil consumption display control program and control method thereof and excavator |
| CN108917868A (en) * | 2018-07-21 | 2018-11-30 | 江苏恩达通用设备有限公司 | A kind of fuel consumption remote monitoring system of engine |
| CN111660807A (en) * | 2019-03-06 | 2020-09-15 | 上海欧菲智能车联科技有限公司 | Oil mass data processing method, processing device, medium and vehicle |
| CN112507518A (en) * | 2020-11-09 | 2021-03-16 | 东风汽车集团有限公司 | User comprehensive oil consumption calculation method and device |
| CN112507518B (en) * | 2020-11-09 | 2022-07-01 | 东风汽车集团有限公司 | User comprehensive oil consumption calculation method and device |
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