OBDII Car MPG Demo (Gasoline)

Version 1.1.2

Tool for every car (Gasoline or Gasohol engine)

Runs on Android Mobile and Tablet devices

Requirement:

1. The car must be OBD-II compliant to use the tool

2. A Bluetooth Adapter ELM327 or compatible

3. The minimum Android OS is : 4.0.3 (IceCreamSandwich)

4. The built-in bluetooth device on the phone(Tablet) must be enabled and paired with the bluetooth OBD-II adapter

OBD-|| protocol:

* The functionality of Auto detect the OBD-II protocol let's the app to be very easy to use

* Displaying the description of the protocol used in the car

SAE J1850 PWM (Ford)

SAE J1850 VPW (GM)

ISO 9141-2 (Chrysler, European, Asian)

ISO 14320 KWP-2000

ISO CAN 15765 - 11bit, 29 bit, 250Kbaud, 500Kbaud (most models after 2008)

Features:

* The MAF or MAP, IAT (OBDII PIDs) must be supported by the car

* Fuel consumption can be calculated, if a vehicle supports Pid 0x0D Vehicle Speed (Vss) and Pid 0x10 Mass Air Flow (MAF). All vehicles support vehicle speed and nearly all vehicles support MAF.

* As for other ways of doing this, especially if your car does not have a MAFsensor, by knowing the displacement of the engine (ED), and the "volumetric efficiency" (VE) of the engine, MAF can be calculated from RPM, MAP and IAT. With VE, one can use the following formulas to calculate a synthetic "mass air-flow" (MAF) in grams per second , all without a MAF sensor, using the "Ideal Gas Law", as follows:

IMAP = RPM * MAP / IAT

MAF = (IMAP/120)*(VE/100)*(ED)*(MM)/(R)

Notice:

* The DEMO version shows example and detects that if your car supports MAF pid or MAP pid, or you can not use this app for your car.

New feature on the Pro version:

* Use SqLite database for data storage .

* Feature Review your route on Google Map with data of MPG(OBDII), speed(OBDII), time and GPS.The app will store data into SQLite database and then can review on Google map. The data stored in database is the integration between GPS location data and OBDII data together

Use with real car :

Once you have the bluetooth OBD-II adapter plugged into the car's OBD-II ports and powered on, you need to connect to the car's system computer via that bluetooth adapter, by pulling down the option menu and select item "Connect to OBD-II Adapter", a dialog window will appears and shows a list of paired devices (one or more devices in the list), each paired device has two information as following:

Name of paired bluetooth device (for example: obdii)

Max address (for example: 77:A6:43:E4:67:F2)

The Max address is used to distinguish two or more bluetooth adapters have the same name.

You must choose your bluetooth OBDII device by select the correct it's name (or it's max address) in the list and click on the item, then the app starts connecting process and autodetects the OBD-II protocol.

Use with "ECU Engine Pro" app from Google Play Store (Simulation only):

The "ECU Engine Pro" app is installed into an other device and act as a car engine ECU simulation. The connection to this device is the same as above with a real car

Screen arrangement

* 4 small analog gauge for IAT, MAF, MAP, VSS, RPM realtime data reading, 1 big analog gauge for showing instant MPG value and a table used to display the average (AVG) MPG, L/100Km, amount fuel consumed in Gallons and in liters

* 2 Odometers calculated in Miles and in Kilometers. 1 tripmeter for time since engine start

* A logo indicates Fuel type (Gasoline or Exx) , a logo indicate either US Gallon or Imperial (UK) Gallon

Setting...

For example the VE of 1999 7.4L Chevy Suburban is about 65%. Smaller, higher performance engines can have VE's of 85% or higher. (By convention : We set VE = 0.65 for 65% ...)

The ED we set ED = 1.6 for engine 1.6 liters ...

Set the Fuel type as Gasoline or Exx , set Gallon US or Gallon UK

The result of last work is stored and will be reloaded for next time you run the app. these data will be overwritten automatically when the app stops (finish)

版本1.1.2

适用于每辆汽车的工具（汽油或汽油发动机）

在Android移动设备和平板电脑设备上运行

需求：

1.汽车必须符合OBD-II规范才能使用该工具

2.蓝牙适配器ELM327或兼容

3.最低Android操作系统为：4.0.3（IceCreamSandwich）

4.必须启用手机（平板电脑）上的内置蓝牙设备，并与蓝牙OBD-II适配器配对

OBD- ||协议：

*自动检测OBD-II协议的功能使我们的应用程序非常易于使用

*显示汽车所用协议的描述

    SAE J1850 PWM（福特）

    SAE J1850 VPW（通用）

    ISO 9141-2（克莱斯勒，欧洲，亚洲）

    ISO 14320 KWP-2000

    ISO CAN 15765-11位，29位，250Kbaud，500Kbaud（2008年之后的大多数型号）

特征：

 *汽车必须支持MAF或MAP，IAT（OBDII PID）

 *如果车辆支持Pid 0x0D车速（Vss）和Pid 0x10质量空气流量（MAF），则可以计算燃油消耗。所有车辆都支持车速，几乎所有车辆都支持MAF。

 *至于其他方法，尤其是在您的汽车没有MAF传感器的情况下，通过了解发动机的排量（ED）和发动机的“容积效率”（VE），可以从RPM计算MAF， MAP和IAT。借助VE，可以使用以下“理想气体定律”，使用以下公式来计算合成的“质量空气流量”（MAF），单位为克/秒，而所有这些均不具有MAF传感器：

IMAP = RPM * MAP / IAT

MAF =（IMAP / 120）*（VE / 100）*（ED）*（MM）/（R）

注意：

  * DEMO版本显示示例，并检测您的汽车是否支持MAF pid或MAP pid，或者您无法将该应用程序用于汽车。

专业版的新功能：

 *使用SqLite数据库进行数据存储。

 *功能在MPG（OBDII），速度（OBDII），时间和GPS数据上查看您在Google Map上的路线。该应用会将数据存储到SQLite数据库中，然后可以在Google Map上查看。数据库中存储的数据是GPS位置数据和OBDII数据之间的集成

与真车一起使用：

将蓝牙OBD-II适配器插入汽车的OBD-II端口并打开电源后，您需要通过该蓝牙适配器连接汽车的系统计算机，方法是下拉选项菜单，然后选择“连接到OBD-II”适配器”，将出现一个对话框，并显示已配对设备的列表（列表中一个或多个设备），每个已配对设备具有以下两个信息：

    配对的蓝牙设备的名称（例如：obdii）

    最大地址（例如：77：A6：43：E4：67：F2）

    最大地址用于区分两个或多个具有相同名称的蓝牙适配器。

您必须通过在列表中选择正确的蓝牙名称（或最大地址）来选择您的蓝牙OBDII设备，然后单击该项目，然后该应用开始连接过程并自动检测OBD-II协议。

与Google Play商店中的“ ECU Engine Pro”应用一起使用（仅模拟）：

“ ECU Engine Pro”应用程序已安装到其他设备中，并用作汽车发动机ECU仿真。该设备的连接与上面的真实汽车相同

屏幕布置

  * 4个用于IAT，MAF，MAP，VSS，RPM实时数据读取的小型模拟仪表，一个用于显示即时MPG值的大型模拟仪表，以及一个用于显示平均（AVG）MPG，L / 100Km，加仑油耗的表格和升

  * 2里程表以英里和公里为单位计算。自发动机启动以来的时间为1个里程表

  *徽标指示燃料类型（汽油或Exx），徽标指示美国加仑或英制（英国）加仑

设置...

   例如，1999年7.4升雪佛兰Suburban的VE约为65％。较小，性能更高的引擎可以具有85％或更高的VE。 （按照惯例：我们将VE = 0.65设置为65％...）

   我们将1.6升发动机的ED设置为ED = 1.6 ...

    将燃料类型设置为汽油或Exx，将加仑美国或英国加仑

上次工作的结果将被存储，并将在下次运行该应用程序时重新加载。当应用停止运行（完成）时，这些数据将被自动覆盖