I want to know that how can we give inputs to ECU
we ,students are going to design a car,we have an event .So could u please tell me ,what are the inputs we should give to ECU and also how should we give , I mean on what base we should mention the specific value . our engine is KTM 390 cc ,so how can we give inputs to the ECu,as we decided to design ECu own.
ON what base we should decide the inputss ..pls give reply
Experienced mechanics share their insights in answering this question :
Considering that this answer is only based on reading your question and not based on any other knowledge I have as to what you are trying to do, typically inputs are given to ECUs by means of different types of sensors. These sensors will provide inputs in the form of a voltage to the ECU. The ECU then sends outputs to other components based on the inputs from the sensors.
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The ECU receives information from various sensors on the engine, compares that information to predetermined programming decided on by the manufacturer, and then sends outputs to the spark plugs, fuel injectors and other components to allow the engine to run as effectively as possible.
ECU may mean Electronic Control Unit w/c is a computer box controlling a specific part of the vehicle. Older vehicles usually controlls only the engine hence they call ECU as Engine Control Unit.
A computer box is also known as the car Engine Control Unit (ECU), is the brain of an automobile that is used to monitor and to a flexible extent, control certain parameters and features of a car engine.
The CAN bus system enables each ECU to communicate with all other ECUs – without complex dedicated wiring. Specifically, an ECU can prepare and broadcast information (e.g. sensor data) via the CAN bus (consisting of two wires, CAN low and CAN high).
The communication from sensor to the control unit ECU is realized by current modulation. Thereby a “logical 1” is represented by a falling edge and a “logical 0” is represented as a rising edge. For data transmission the manchester code is used. The sensor data are sent periodically to the ECU.
ECU coding refers to the process of configuring specific settings or options in the ECU software. This may include options such as the vehicle`s engine size, transmission type, or other specific parameters that the ECU needs to control.
ECUs control almost every part of a car, like an engine, brakes, transmission, and airbags, while automating these parts and increasing efficiency. ECUs consist of one or more microcontroller CPUs that are specialized chips adapting easily in a rugged operational environment, high temperature, and gravitational pull.
Voltage can range from 11 to 15 volts under normal conditions and from 8 to 24 volts under transient starting and running conditions.
Can a car run without ECU? No, Modern cars have to have the ECU as it controls everything the engine does hence Engine Control Module.
Each ECU (Fig. 1) is powered from the car battery through a front-end buck converter. Back-end point-of-load (POL) buck converters, in turn, power the ECU`s smart loads (MCU, CAN, I/Os) with the low voltages required by each.
Regulation of idle speed – The engine control unit makes use of sensors monitors that are located in a crankshaft position. This allows the ECU to regulate idle speed effectively. Valve timing – The same sensors which were just mentioned also allow the engine control unit to control and manage valve timing as well.
Cars use communication protocols such as Controller Area Network (CAN), Local Interconnect Network (LIN), FlexRay, Media Oriented Systems Transport (MOST), and Ethernet to communicate between different electronic control units (ECUs). For example, a body control module (BCM) communicates with a rain sensor using LIN.
The sensors used by the ECU include: accelerator pedal position sensor. camshaft position sensor. coolant temperature sensor.
While a modern car may be drivable with a faulty or defective ECU, it will be impossible to drive one without an ECU at all. For instance, as a car`s ECU will control the car`s electronic fuel injection system, the engine won`t be able to run if it`s missing this component.
Modified Stock ECU
Using a real time programmer in place of the eeprom chip on the ECU board, a custom tune can be performed. A modified stock ECU allows for direct control over all functions of the factory ECU, so excellent performance, fuel economy, and overall running can be achieved.
Regulation of idle speed – The engine control unit makes use of sensors monitors that are located in a crankshaft position. This allows the ECU to regulate idle speed effectively. Valve timing – The same sensors which were just mentioned also allow the engine control unit to control and manage valve timing as well.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I want to know that how can we give inputs to ECU
ANSWER : Considering that this answer is only based on reading your question and not based on any other knowledge I have as to what you are trying to do, typically inputs are given to ECUs by means of different types of sensors. These sensors will provide inputs in the form of a voltage to the ECU. The ECU then sends outputs to other components based on the inputs from the sensors.
My car want start and when it do it shut down and want start until 30 minute or so. Now it want do nothing
ANSWER : When a car turns and won’t start, it is called a "crank no start". When this occurs, the first thing you need to do is see what is missing. All internal combustion motors need spark, fuel, injector pulse and camshaft timing to run. If one of these is missing, you have a crank no start. Diagnose the car and see what is missing.
The GM 3.8l motor has been installed in Buicks, Pontiacs and Chevrolets for decades. Particularly during the 90’s and early 00’s, these motors have used an ignition module with three coils mounted to it. This module is prone to just this type of failure. When it gets too hot, it quits working. When it cools off, it starts again. It can also display intermittent no start conditions. This is a pattern failure on this particular motor. Before I would ever replace the module, I would check for spark and injector pulse. If it just lacks spark, I would check for a crank sensor signal and replace the ignition module.
Before we get too far ahead of ourselves, do a few tests first:
Check fuel pressure. If there is none, check the fuse and the relay.
Check for injector pulse with a noid light. If this is missing, I would suspect a crank sensor. It could be a bad Power Control Module (PCM). (PCM’s are very rare to fail. I have never changed a PCM on one of these cars.)
Check for spark with a spark tester. If it is lacking spark but has injector pulse, suspect the ignition module.
If all these are present, I would take a compression test of all the cylinders. If camshaft timing is off, several of the cylinders will have significantly lower compression. Also, camshaft timing won’t start sometimes then not others; it will either start and run bad or it won’t start at all. It may sound like it is trying to start, but it won’t start.
If all of this sounds to daunting, I recommend booking a car is not starting inspection with YourMechanic
Good luck!
im a first time driver and i got a rx8 i want to know everything that i need to know about my car
ANSWER : Well, I won’t be able to tell you everything you will need to know about your car. But I can give you some general advice and knowledge that will certainly come in handy no matter what kind of car you own.
The number one thing with any car is to check your fluids. Some people will do this every time they fill up their fuel tank. Others will do it every 1,000 miles or so. What’s important is you get into the habit of checking your fluids on a regular basis. Whatever works for you. Since you are first time driver, I would recommend checking all fluids with every tank of gas. This will give you a feel for what happens with each fluid and the system they are a part of. The general rule of thumb for all fluids is, if you don’t see a leak, the fluid level is probably good. This isn’t a foolproof method though. Once you get to know your car better, it is a useful method of knowing if any fluids need to be checked asap.
Always check the engine oil. Of any other fluid, aside from your brake fluid, this is the most important. Mainly, it is the most likely to become low quickly and damage your motor. There doesn’t have to be an engine oil leak for your motor to run out of oil. This is why it should be check more often than any other.
Your brake fluid level can usually be checked through the clear reservoir that contains the brake fluid. Unless there is a leak, or the brakes are almost gone, brake fluid level will be constant with little change for a long time. Since it is the primary safety device on any vehicle, a quick glance to make sure it has fluid is easy enough.
Coolant or antifreeze is very important as well. If the fluid is low, it can cause a lot of damage to your motor. It is especially important to know that your coolant should never be checked if the engine is hot. Checking your cooling system when it is hot is very dangerous. Just don’t do it.
Gear oil and transmission fluid are also important. These two often don’t have an easy method of checking them. If the transmission is an automatic, it might have a dipstick. Other than that, this is a good example of a system that only needs to be checked if there is signs of a leak. All fluid should be replaced on a maintenance schedule that the manufacturer specifies.
Power steering fluid is similar to gear oil and transmission fluid. It will likely have a reservoir to check it, but really only needs to be checked if there are signs of a leak.
Fluids aside, you may want to find out more information about maintenance schedules for your car. If you have the owners manual, this is a good place to find that information. If not, the most reliable source is to ask a dealer. Maintenance schedules are determined by mileage for each system.
I assume you know you have a rotary motor and it is very different that all other motors on the road. Getting into how this is significant and would take sometime. I recommend reading up on rotary motors for more information.
If you would like someone to inspect your entire vehicle for more advice about what exactly your car needs at this mileage, I would have a complete inspection done in person to make sure your car is kept in great shape.
Good luck with your first car!
I’m about buy a 2004 chevy imapla and I want to know how I can know how I can check for the mechanical things under the hood
ANSWER : You want to make sure that you can start the car with the engine cold – meaning the vehicle has not been warmed up or run for several hours before you take a test drive. Sometimes engines and/or external components like the water and power steering pumps can make noise when they are cold. That’s an indication that they may need replacement soon if not immediately. Listen for any unusual whining or "ticking" sounds. Before you start the engine, check fluid levels and conditions.Check the engine, transmission, and power steering fluid levels and condition. The engine oil should be clean (remove the oil filler cap as well) and the transmission fluid should be a reddish-pink color and have sort of a sweet odor. If it smells burnt or looks brown or black, the transmission may be overdue for a service and may have issues because of it. Take a test drive that allows you to drive some stop and go as well as some highway areas. The transmission should shift smoothly on both up-shifts as you accelerate and downshifts as you slow down. Listen for any "clunks" or knocking sounds over bumps. Any unusual sounds may indicate suspension issues. Also, check all the accessories. Make sure features like power windows, locks, cruise control, air conditioning, etc all work as they should. With the age and mileage on the vehicle, don’t be shocked to find items that may not be working properly. You can use anything that does not function or seem correct as a bargaining point for the price of the vehicle. Don’t buy it if anything makes you feel uncomfortable. There are plenty of vehicles on the market to look at. If you have any doubts, a pre-purchase inspection may save you money and headaches down the road.
I want to buy a used car of model 2001 Honda Civic lx. I want to know the basic problem with this type of model.
ANSWER : Hi there. To my knowledge, there really isn’t an "issue" with the 2001 Honda Civic that would place it in a risky purchase category. Like any other vehicle that is 15 years old, there are many things to consider when determining if a vehicle is a good one for purchase such as verifying service records, checking a Car Fax report to see if it’s been in an accident or having a professional mobile mechanic complete a pre-purchase car inspection. The inspection would allow a professional mechanic to check more than 50-individual components and systems that tend to wear out on a vehicle overtime. It will also give you an idea as to what major repairs are needed to be completed.
Truck starts. Idles fine. I give it a little gas and it wants to stall. I give half throttle or full throttle it runs fine.
ANSWER : Hi there. Since you’re going to clean the EGR in a few minutes, that might be where your problems are coming from; that or the throttle body being coated with carbon build-up on the inside of the throttle blades. Try cleaning both items and see if that helps to reduce your engine stalling out issue. If those two jobs don’t fix your issue, contact one of our local mechanics who can help you diagnose the problem.
my question is that i want to get a nissan sliva s14 which is the 240sx i guess but when i get it i want to convert it into a gtr
ANSWER : Hello. I have seen several s14/240sx’s with the RB26 motor installed in them. I do not believe that it is a direct swap however. There is most likely some fabrication involved. If you search around on the internet i’m sure there are "kits" available that may include motor mounts and other parts that will help in the swap. The bodies of the two cars are quite different so i do not believe it is possible to swap bumpers between the cars. Also, AWD is not possible to to space constraints due to the differences in the bodies and frames of the cars. I’m not saying that I’m an expert with these cars but from what I’ve seen over the years this is what I know. I will say that given enough time, skill and money anything is possible. Have you considered swapping in a LS1 corvette motor? That is another popular swap that is pretty straight forward.
Stop at stop sign, give it the gas, it want go, let up, push down agin it goes,the engine does not die.!!!!
ANSWER : What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about 800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.
