Pages: . I realize that most people don't want to help with this because of liability reasons, but don't worry because we have a fail-safe button that the driver can press to cut power if anything goes wrong. I can currently working on having it controlled by a PID controller in a similar fashion as what I imagine a servo works. The throttle body has two TPS's that output an inverse voltage so that the difference can be taken to determine the position. I have almost everything working except the PID controller.
The throttle body bounces all over the place for a good minute or so before settling in. Since this is a throttle body the reaction time needs to be very fast. My code is below, any help is much appreciated as we need to have this vehicle moving under it's own power in two days. Code: [Select]. The art of getting good answers lies in asking good questions. Quote from: JohnLincoln on Apr 03,am. Quote from: PaulS on Apr 03,pm. PeterH Guest. Quote from: arbartz on Apr 03,pm.
Thank you for your suggestions! I have changed the code to have the correct safety features and have looked up PID tuning. I have tried the manual tuning method described on Wikipedia with some success.
It no-longer jitters, but it takes a while to reach the set point sometimes. Here is my code so far: Code: [Select]. Why in the heck would you want to use a PID for controlling a throttle body?
PID are fairly slow algorithms by nature, they are designed for systems where there is lots of lag and overshoot, noise, or ripples. Furthermore, your servo will have a PID algo built into its controller for the purpose of maintaining a set position against any disturbances.
Finally, what you want out of a throttle control is speed and a direct, linear relationship to the loud pedal. Don't muck it up more than you absolutely have to.
The reason that carmakers these days use electronic throttle bodies is because it gives them the ability to "get in the way" of the driver for the purpose of fuel economy and safety traction control.I am testing my new setup for drive by wire and have wired in the Bosch electronic throttle body and also a pedal sensor, all is configured fine and the throttle body opens and closes by the throttle pedal sensor.
There is a noise coming from the throttle body which I think is from the pulse width modulation on the open and close signals, is this normal for this type of throttle body? I have attached a short clip of the throttle body, I guess that when the engine is running this would not be noticeable. Attachments may only be downloaded by paid Gold members.
Read more about becoming a Gold member here. What frequency is your PWM? DBW throttle do often make noise like that, but you might try playing with the frequency if your system allows you to configure that. Noise from the throttle body is quite normal. Many ECUs will disable dbw control when the engine isn't running and the throttle pedal isn't moving in order to eliminate the noise.
You do need to ensure that your dbw settings are configured correctly for the particular throttle body you're using though. Don't have an account? Register here. Please enter your details below to register for an account.
This email is already in use. Sign in here. Already have an account? Discuss all things tuning in this section. News, products, problems and results. Posts that are unanswered. Page 1. EddieC Eddie Coxon.
Attached Files IMG August 14, at PM at PM. David Ferguson David Ferguson. August 15, at AM at AM. Simon Andre Simon. August 16, at AM at AM.
Close Member Sign in Please enter your details below to sign into your account. Register here I've lost my password. Close Step 1 of 2: Register Please enter your details below to register for an account. Email This email is already in use. I have read and accept the terms and conditions.General Motors introduced electronic throttle, or drive-by-wire, with the LS1 engine in the Corvette.
Electronic throttle was released before cable throttle for the LS-series engine family. Inthe Camaro and Firebird received a cable throttle LS1 engine. Navigating through the various electronic throttle equipment may be intimidating, but look carefully at the components to ensure success.
The Corvette received the same electronic throttle equipment from — Other than a few GM part number updates, the equipment remained the same and electronic throttle equipment can be interchanged. The LS1 and LS6 engines received the same equipment. Everything changed throttle body, pedal assembly, and TAC when the LS2 engine was introduced in With so many different throttle bodies, pedals, and TAC modules, you must take caution to choose the correct combination of components.
Choosing the wrong components could result in no throttle response and an illuminated MIL lamp. The Corvette throttle body is fitted with a TPS to monitor throttle blade angle. It is also fitted with a motor, operated by the TAC module, to open and close the throttle blade. The TPS housing contains two individual sensors with separate signals, low reference, and 5V circuits.
As the throttle blade is opened, TPS sensor 1 voltage sweeps toward 5V reference, and TPS sensor 2 voltage sweeps toward low reference. This wiring diagram represents the — Corvette electronic throttle control system. The larger mm throttle opening and four-bolt pattern requires an intake manifold upgrade or an adapter plate. Aftermarket wire harness adapters are available for a plug-and-play installation.
The throttle position sensor is mounted on the bank 2 side of the engine and the throttle shaft motor is mounted on the bank 1 side of the engine. The blade on this throttle body measures approximately 75 mm in diameter. The blade on this throttle body measures approximately 90 mm in diameter.
Because the bore is larger and the four-bolt pattern is different than the three-bolt pattern of the LS1 intake manifold, the use of this throttle body requires a different intake manifold or adapter plate. This wiring diagram represents the — Corvette electronic throttle control system with LS2 throttle body. This bench test of the LS2 throttle body demonstrates the electronic compatibility with the — Corvette electronic throttle system. The Corvette PCM and TAC monitor values from the three accelerator position signals to identify proper operation of the accelerator pedal assembly.
APP sensor 1 signals voltage increases as the pedal is depressed. APP sensor 2 and sensor 3 signal voltage decreases as the pedal is depressed. The C5 Corvette — used only one accelerator pedal assembly.
It is very popular because of its size and mounting configuration. Although these vehicles use a different accelerator pedal assembly and TAC-to-pedal wire harness, electronic throttle equipment can be used interchangeably among these vehicles. Be careful to use a matching accelerator pedal and TAC-to-pedal wire harness. In general, trucks with a Gen III engine have two different electronic throttle configurations: — and — However, a careful look at the Gen III electronic throttle systems used in GM trucks from — reveals four specific configurations.
Throttle Body: The truck throttle body is fitted with a TPS to monitor throttle blade angle and a motor, operated by the TAC module, to open and close the throttle blade. The TPS housing contains two individual sensors with separate signal, low reference, and 5V circuits.
The GM truck throttle body looks much like the — Corvette throttle body but with the TPS and throttle shaft motor on opposite sides. The truck and Corvette share the same throttle shaft motor which is not serviceable separately but with opposing polarity. The blade on this throttle body measures approximate 75 mm in diameter.
The GM truck pedal introduced in was used through Chevy Drive-by-Wire systems up. The drive by wire system first appeared on the Corvette with the introduction of the LS1 engine. There are e few such as the 6. The F-bodies were all cable actuated. Drive by wire systems allows for a faster throttle response, better control over throttle application when combined with traction control and ABS and eliminates the need for a separate cruise control module. The APP sensor actually has three position sensors, 1 sensor sends an increasing voltage, while 2 and 3 sends a decreasing voltage but at a different rate.
The program in the TAC has built in parameters to make sure the sensors are in agreement with each other to smoothly actuate the servo motor on the throttle body.
The built in redundancy of the system allows for safe operation of the system in case of minor failures, and will reduce power and even completely shut down the engine in case of a hard failure. The TAC module also is in continuous communication with the pcm. Failure of two sensors will result in reduced power, while an unlikely failure of all systems, may command a complete engine shut down.
The TAC module and pcm communicate through a dedicated redundant serial data circuit. These means that these data line's are used for no other purpose. The TAC module works only with truck. See pcm chart for years listed. The charts above explain the voltage changes on the sensors as seen by the TAC module and this data is also monitored by the pcm. This is the throttle body used on the through Corvette. The TP sensor connector is a 6 pin, while the servomotor uses a 2 pin connector.
This is the throttle body used on the and later trucks and Corvette.
Bosch Accelerator Pedal Position Sensor
The TP sensors and the servo motor are packaged in one unit and this uses a special 8 pin connector. This is the accelerator pedal used on the Corvette and the Trucks equipped with DBW. This is a ten pin connector, that uses only 9 pins. The and later trucks used a different style connector see picture below. TAC Controller.
This is the TAC module controller that is used on the Corvettes and trucks. The next picture shows connector ends on the TACS controller. The ten pin connector goes to the APPS, the 16 pin connector goes to the throttle body, pcm, power and ground connections. The and later systems use a 6 pin APP sensor that only has two sensors.
The above chart is for the accelerator pedal end. Top of page. The above chart is the connector end of the TAC module. These charts are for the throttle body electrical connectors for the Corvette and trucks if equipped. Compared to the earlier APP sensor, the later vehicles use a 6 pin two sensor system. This is essentially the same as the earlier modules, the difference is that only one connector is used for the TPS and the TAC motor control.
If any of this information needs to be updated or corrected, please email me at chevythunderman gmail.Forums New posts Search forums. What's new New posts New profile posts Latest activity. Members Registered members Current visitors New profile posts Search profile posts.
Piston Ring Compressors. Engine Assembly Tools. Oil Testing Kits. Transmission Tools. View All. Clearance - Unopened.
Lightly Used. Open Box Items. Air Filters. Catch Cans. Cold Air Kits. Intake Manifolds. Throttle Bodies. AN Hose. AN Hose Ends. Weld On Fittings.If you are an international customer who ships to a US address choose "United States delivery" and we will estimate your ship dates accordingly. If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. Image is a representation of this item. Actual item may vary. Change Currency.
Throttle Body, MPI, Loading Today Estimated International Date Check Fit. Bosch Motorsport Electronic Throttle Bodies. Brand: Bosch Automotive.
Drive By Wire Throttle bodies
Manufacturer's Part Number: Part Type: Throttle Bodies. Venturi Quantity: 1. Venturi Diameter mm : Gaskets Included: No. Hardware Included: No.
Injectors Included: No. Throttle Body Material: Cast aluminum. Throttle Body Finish: Natural. Quantity: Sold individually. Bosch Motorsport electronic throttle bodies ETBs are designed to control the fresh air delivery of spark ignition engines in combination with an electronic throttle control ETC system.
A typical ETC system includes the following components: electronic throttle body, accelerator pedal module, and electronic control unit.
Summit Racing Verified Purchase. Was this review helpful? Yes No. If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below. Date: February 21, Date: October 03, Date: September 15, I have a Customer Service question order, shipping, returns, etc. I would like to ask other customers a question about this Product. Answer This Question.