Honda Mileage Device Regession Testing update.

The image above shows the Simulated Honda Dashboard connected to the VID as it undergoes bench testing. To the right is the MPH gauge showing 10 mph. To the left is the engine RPM gauge showing about 1400 rpms. In the center are two pointer style gauges showing 10 MPG for both trip and tank. Below, are the odometer style indicators showing miles traveled and gallons used for both tank and trip totals. Note the reset switches are currently cross wireed--so resetting trip-- reset tank instead.

Regression testing of the software changes is going well. The device has run for several days without a repeat of that issue I talked about in the last post. It now seems that the periodic upward variation in injector pulse width and therefore caused by an interrupt synchronization. g issue has been corrected by changing the order of certain instructions in the injector interrupt routine. These changes also resulted in minor code size reduction.

This test also demonstrates the system's reaction to having a Blue Tooth module broadcasting in close proximity to other circuits on the VID board. However, the operation of both the Blue Tooth and RS-232 communication channels is flawless at 57600 baud. I am currently receiving a steady stream of data from the device via the serial to USB device on this laptop and the program shown above. While a HP Pocket Pocket PC receives the same stream via the radio based Blue Tooth interface. I would have to rate the performance of the overall device (in the environment) as excellent.

Below are images of the Pocket PC VID interface program. When this program is involved, it requests the user select a Blue Tooth device from the list of available devices. It then connects and starts displaying data sent from the VID via the Blue Tooth connection. The data is updated each second and sent at about 7000 characters per second-- 57600 baud.

Note that the steady state GPH is about 1.054 gallons. While the speed is about 11 mph. Leading to a MPG of about 11.



This image shows the Pocket PC VID program main screen. The main screen shows RPM, MPH, GPH, and MPG. At the bottom of the main screen is the tab component selector bar. The user interacts with the tab control by simply clicking on the desired tab--- the screen the changes.
Below the tab control is the dialog menu which has three items. Exit, Connect, and Disconnect. Connect and Disconnect refer to the Blue Tooth Device. When the program first starts, the user is required to click on Connect-- this leads to a system screen for Blue Tooth device Selection. The user can click Disconnect or simply click Exit.

This image shows the Tank Screen: Tank Miles, Tank Gallons, Tank Seconds, and Tank MPG.

This image shows the RAW screen. Raw screen shows the current injector pulse and period width, along with the computed duty cycle percentage.

This image shows the Trip screen. Same items at the Tank Screen. Notice the crowding of
characters bug.

Finally, this images shows the Port setup screen. Blue tooth COM6 and 57600 baud rate are defaults here.