What if we say it's not like the others?
AFH55M-12 Nissan Frontier Mass Air Flow Sensor 2.4L 4Cyl 1998-2004, AFH55M-12 Nissan Pickup D21 Mass Air Flow Sensor 2.4L 4 Cylinder 1996-1997, New OEM Hitachi Air flow Meter / Mass Air Flow Sensor, One Year Warranty, For More Info Call 310 835 3100.
- Flowmeter problem? Try CARBON CLEANING! Don't forget to clean your engine every years or 10000 miles. Preventive engine cleaning enables you to restore engine parts rather than replacing them, thereby saving vehicle owners on costly parts, such as a new turbocharger ($ 1.350 - 3.100), catalytic converter ($ 600 - 2.000), DPF ($ 600 - 2.000) or EGR valve ($ 370 - 500).
- Mass Air Flow Sensors & Components. 1997; 1997 Jeep Wrangler Mass Air Flow Sensors & Components. Show items: 60; 90; 120; Sort. 2.5L; 4.0L; Original (OEM) Air Intake Parts. No matter the type of vehicle you own, its engine needs two basic things to function: fuel and oxygen. And it's the air intake system that supplies.
- 1996 - 1997 Nissan Pickup XE 4 Cyl 2.4L; 1997 Nissan Pickup Base 4 Cyl 2.4L Automatic Transmission, Probe Only; Product Details. P00BC Code: Mass Air Flow.
Airflow is different We're not cutting any corners. This is not yet another FFmpeg wrapper like you might have seen elsewhere. Don't get us wrong, we love FFmpeg and use many of its parts under the hood, but our custom built video processing pipeline goes way beyond wrapping FFmpeg and calling it a day. We've been working on it for years it and it lets us do things that other similar software simply can't.
It's a bold claim for sure, so here are just a few examples:
- AirPlay HEVC videos to Apple TV without transcoding
- Streaming to AirPlay 2 enabled TVs
- Adaptive audio volume, spatial headphone downmix
- Lossless audio transcoding when streaming to Apple TV (FLAC codec, requires tvOS 14)
- High quality audio transcoding when streaming to Chromecast (Opus codec)
- OCR (text recognition) for DVD/Bluray/Vobsub subtitles
..with a very particular set of skills..
Airflow is a razor sharp focused software. It supports specific set of devices and it will pull every trick in the book to get the best possible results on these devices. It may not stream video to your smart fridge, but it will gladly push your Chromecast, Apple TV and AirPlay 2 TVs to their limits.
And yes, Airflow can handle pretty much any video format and codec you throw at it.
Pixels, pixels everywhere!
Airflow can stream full 4K HDR HEVC files to Chromecast Ultra, Built-in, Apple TV 4K and AirPlay 2 enabled TVs. It will go out of its way not to touch the original video stream unless absolutely needed for compatibility reasons, ensuring best possible video quality with lowest CPU load (your computer fans will thank you). As far as we can tell, Airflow is still the only desktop software that can natively stream HEVC videos to Apple TV and AirPlay 2 TVs.
And for those pesky videos that are incompatible with your device - Airflow will handle that tranparently, with hardware accelerated transcoding if your computer supports it.
Audio pipeline that goes to eleven
Full multichannel support including DD+ passthrough with Dolby Atmos? Adobe cc collection 2017. Of course.
Advanced adaptive volume booster + limiter for late night watching when you don't want to disturb your neighbours with loud scenes but still want to hear the dialogue clearly? Check.
Spatial headphone downmix for surround sound videos? Also check.
Detailed A/V sync adjustment where you can compensate for the delay of individual devices like bluetooth headphones? Airflow has it.
And subtitle support to match it
For both embedded and external subtitles. It's a bit of a secret that pretty much every other streaming software needs to extract embedded subtitle tracks before playing the video. That involves reading the entire file upfront! Crazy, right? Airflow needs no such crude tricks. Embedded or external, for our playback pipeline it's all the same. All widely used subtitle formats are supported, now including vobsub. Integrated opensubtitles.org search is a cherry on top.
..with real time text recognition
Some subtitles (DVD, Vobsub, Bluray) are stored as pictures. This means that the only way to render them when streaming is to burn them in the video. That's inconvenient to say the least. It massively increases CPU load (think fan noise and heat) and it's completely infeasible to do for 4K videos.
Enter our new realtime subtitle text recognition (OCR). During playback Airflow will transparently extract the text from picture subtitles and render it on target device just like it would with regular text subtitles.
But wait, there's more!
The 'small' things, like the scrubbing preview, beautiful polished user interface, multiple playlists support, meticulous last position tracking, or the integrated Speed Test for Chromecast, which is invaluable when dealing with network connection issues. The list goes on. Persecond 1 2 1.
Did we mention the remote control companion app for Android and iPhone? No? Well, it's pretty cool. It lets you control all Airflow features from the comfort of your couch. And it's completely free!
Sensor information
Type: | Hot wire |
---|---|
Power supply: | 12 V from system relay and ground |
Signal type: | Amplitude variating |
Signal level: | 0.2 V to 4.0 V |
Workings of the hot wire air flow meter
The Mass Air Flow (MAF) sensor measures the amount of passing air going through the air intake system. The sensor measures the amount of passing air with a resistive platinum wire that is placed in the air stream of the air intake system. The resistive wire has a positive temperature coefficient: the higher the temperature the higher the resistance of the wire. Electronics in the air flow meter sends an amount of current through the wire to warm it up. The wire temperature is kept constant. When more air passes the wire, more current is needed to keep the wire at a constant temperature. The current that flows though the wire is a measure for the amount of passing air. The current is measured by the electronics in the sensor and converted to a voltage at the output of the sensor. The engine control unit (ECU) calculates the amount of air going into the combustion chambers from this voltage.
Connecting the lab scope
Correct functioning of the hot wire air flow sensor can be checked by measuring the following signal voltages, see figure 1: 1password 4 4 1 – powerful password manager.
Channel | Probe | Voltage | Range |
---|---|---|---|
1 | Sensor output signal | 8 V | |
Ground on battery | |||
2 | Positive side of sensor power supply | 20 V | |
Negative side of sensor power supply |
The lab scope is connected to the hot wire air flow sensor via a Measure lead TP-C1812B and Back Probe TP-BP85 and set to recorder mode. In recorder mode a streaming measurement is performed, continuously displaying the signals live on screen. Because the measured signals vary slowly, the Automotive Test Scope ATS5004D is set to a slow measuring speed.
Measuring
Figure 3 shows a waveform of a hot wire air flow sensor of a car with running engine. The signals are measured under the following conditions: key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle. This signal can be downloaded and used to correctly set up the lab scope or as reference signal.
Channel 1 (red) shows the signal of the hot wire air flow sensor and channel 2 (yellow) the power supply of the sensor. At the beginning of the measurement the key is turned on, which is followed by a short pulse in the signal voltage. The short pulse shows the warming up of the wire until it reaches a certain temperature. Shortly after that, the engine is started and some time elapses before the engine speed stabilizes at idle RPM. During the measurement the throttle is opened twice to increase the engine speed and therefore the amount of air passing. With the increase in passing air the signal voltage increases. Nearly at the end of the measurement the throttle is released and the signal voltage drops until the engine speed is at idle again. The power supply has some fluctuation but this has no affect on the performance of the sensor because the electronics in the sensor stabilizes the power supply. The signal from the hot wire air flow sensor shows a low amount of noise and spikes but have no affect on the performance of the engine management system because the ECU filters the input signal voltage.
Diagnosis
Signal values may differ on different types of engine control units and hot wire air flow sensors. Consult ATIS for information on specific engine control units and hot wire air flow sensors.
Airflow 2 4 1997 Fleer
The following signal deviations can indicate a problem:
- No signal:
Cause: back probes have no connection (perform a connection test), no power supply, sensor defective - Signal voltage to high:
Cause: poor or no ground on power supply, sensor defective - Signal shows more noise than example signal:
Cause: wiring of signal wire or power supply damaged, poor connection in connector terminals, sensor defective - Signal shows an offset in relation of the example signal:
Cause: scope is not set to DC coupling: , poor power supply to air flow meter, false air leaking into the air intake system, sensor defective
- Manifold Absolute Pressure (MAP) sensor
- With a lab scope a Manifold Absolute Pressure (MAP) sensor is measured under the following conditions:key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature.The signal from the sensor is shown and can be downloaded.To help determining whether a MAP sensor is functioning correctly,different possible deviations from the example signal are mentioned along with probable causes.
- Mass Air Flow (MAF) vane sensor
- With a lab scope an air flow sensor is measured under the following conditions:key on, cranking, idle, 2000 RPM, 3000 RPM and back to idle with an engine at operating temperature.The signal from the sensor is shown and can be downloaded.To help determining whether an air flow sensor is functioning correctly,different deviations from the example signal are mentioned along with possible causes.
- Troublesome Volvo XC70
- A Volvo XC70 had serious engine related drivability problems.The engine lacked power, would hold back and even stall.Error codes indicated problems in two different areas.Replacing components did not improve things.Proper measuring with an automotive diagnostic oscilloscope revealed two independent problems.Fixing these solved all problems.
2/4 Fraction Symbol
This document is subject to changes without notification. All rights reserved.
The information in this application note is carefully checked and is considered to be reliable, however TiePie engineering assumes no responsibility for any inaccuracies.
Airflow 2 4 1997 Mustang
Safety warning:
Airflow 2 4 1997 Monte Carlo
- Before measuring, check that sources of dangerously high voltages are switched off or shielded from contact. Voltages considered to be dangerous are voltages over 30 V AC RMS, 42 V AC peak or 60 V DC.
- Keep a clean working environment when doing measurements.
- This measurement and procedures are a examples / measuring suggestions and are no prescribed protocols.
- TiePie engineering can not anticipate the safety actions that need to be taken to protect persons and appliances. Before starting a measurement, check which safety measures need to be applied.