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Topic: Electronic throttle control

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	Electronic throttle control - Wikipedia, the free encyclopedia
		Electronic throttle control (ETC) is an automobile technology which severs the direct link between the accelerator pedal and the throttle.
		Most automobiles already use a throttle position sensor (TPS) to provide input to traction control, antilock brakes, fuel injection, and other systems, but use a long sheathed cable to directly connect the pedal with the throttle.
		It also makes it easier to integrate cruise control to the vehicle, since there is no need for a mechanical actuator on the throttle.
	en.wikipedia.org /wiki/Electronic_throttle_control (404 words)

	Foot pedal arrangement for electronic throttle control of truck engines - Patent 4958607
		The present invention relates to a foot pedal used for electronic throttle control in diesel engine powered trucks, and in particular it relates to a foot pedal that is mounted on the front wall of the truck cab in a manner that permits conventional foot pedal control.
		Controlling the rate of fuel dispensed to the cylinders, commonly referred to as throttle control, in diesel engines is accomplished by adjusting the output of the fuel pump.
		Throttle controls have evolved from a mechanical linkage directly connecting a foot pedal to the fuel pump, to an electronic linkage between the foot pedal and a computer, the computer then controlling the fuel pump.
	www.freepatentsonline.com /4958607.html (2768 words)

	Electronic throttle control system having operation monitor - US Patent 6816772 (Site not responding. Last check: 2007-11-04)
		In an electronic throttle control system for an internal combustion engine, the throttle control operation is monitored by determining whether an actual throttle angle (opening position) or a calculated throttle angle is within a predetermined range defined by an upper limit value and a lower limit value.
		A characteristic of the throttle control value or the monitor value data is that it is defined in a way that it logically causes the throttle angle to be controlled in a throttle closing direction, when a memory retention abnormality occurs.
		The target throttle angle, upper limit and lower limit data are stored in the memory 11a in an inverted magnitude logic (e.g., as the ones-complement) relative to the logically expected memory retention abnormality (abnormal change of data stored in a memory), so that the throttle angle is decreased when a memory retention abnormality occurs.
	www.patentstorm.us /patents/6816772.html (3758 words)

	Electronic Throttle Control - Spring Semester 2001
		Electronic control of engine throttle is quite important to the continued effort of automotive producers to build a drive-by-wire automobile.
		Electronic control of this plate offers improved fuel economy and emissions by maintaining optimal throttle conditions at all times, which is something human driver cannot do.
		To control the throttle we need to reproduce the input signal, which in this case is the resistance of a sensor on the pedal (PPS), with the voltage on the throttle position sensor (TPS) that corresponds to that pedal sensor value.
	www.egr.msu.edu /autoweb/Class/Proj_2001/throttle/project.htm (2157 words)

	Sensors Magazine Online - May 1999 - New Sensors Help Put Pedal to the Metal (Site not responding. Last check: 2007-11-04)
		Electronic throttle control sensors--pedal position sensors--essentially eliminate the obsolete cables used to connect the accelerator pedal to the throttle body.
		Electronic throttle control was originally designed for use in large trucks and has gradually been reconfigured for light trucks and sport utility vehicles.
		Electronic throttle control is a reliable and virtually failsafe technology that prevents malfunctions in high-performance vehicles from causing unexpected acceleration at full throttle.
	www.sensorsmag.com /articles/0599/0599_p66/main.shtml (1126 words)

	Recognition algorithm for electronic throttle control - Patent 5307776
		controlling the position of the air inlet valve according to a predetermined relationship between accelerator pedal position and air inlet valve position after sensing release of the accelerator pedal and depression of the brake pedal.
		controlling the degree of opening of the internal combustion engine air inlet according to a predetermined relationship between the throttle opening command and the degree of opening of the air inlet after determining that the sensed braking command exceeds the predetermined minimum braking command.
		The present invention addresses a control opportunity that arises with the application of electronic control of intake air metering by providing a vehicle operator a precise means of indicating vehicle motion intentions and by substantially restricting vehicle motion until such intentions are indicated.
	www.freepatentsonline.com /5307776.html (3623 words)

	Automotive technical Topics - Electronic Throttle Control
		There are several reasons why electronic throttle actuation is preferable to a conventional throttle cable.
		The throttle pedal has two potentiometers attached to it, achieving the accuracy required from the pedal's movement.
		The blue trace shows a conventional rising voltage as the throttle butterfly is opened, while the red trace is inverted.
	www.auto-solve.com /etc.htm (855 words)

	Return spring mechanism for an electronic throttle control assembly - US Patent 6375151 (Site not responding. Last check: 2007-11-04)
		The position controlling device accommodates situations where the electric motor assembly of the throttle control arrangement fails to operate as desired or does not receive proper power or command signals, for example.
		One challenge associated with an electronically controlled throttle assembly is addressing situations where the electric motor stops operating properly or there is some malfunction in communicating control signals or power to the motor.
		In general terms, this invention is an electronic throttle assembly for a vehicle with an automated, mechanical return mechanism to control the position of the throttle assembly components.
	www.patentstorm.us /patents/6375151.html (2198 words)

	Delphi Electronic Throttle Contr
		The electronic throttle body has 2 potentiometers for sensing throttle valve angle, a DC brush type actuator for positioning the throttle, 2 stage gear reduction, and a return spring mechanism which positions the valve slightly open when the actuator is not powered.
		Throttle actuation diagnostics are performed to evaluate the ETC throttle actuator and the throttle feedback mechanisms for performance faults.
		Throttle authority limiting ensures that the complicated processing to determine the throttle command is rational with respect to the pedal input.
	www.fastfieros.com /tech/delphi_etc.htm (4972 words)

	AutoSpeed - Electronic Throttle Control Advances
		Electronic throttle control (aka ETC, E-gas and throttle-by-wire) has been fitted to high specification vehicles for over 10 years.
		ETC's variable relationship between the accelerator position and throttle blade position is ideally suited to compensating for an assortment of factors, including smoothing the use of the throttle and taking into account factors such as cat converter warming.
		ETC is also a technology with major implications for modified performance cars, where sudden changes in torque development (eg an engine coming on cam or boost suddenly rising) can be compensated for, and where throttle response can be tailored to the driving conditions.
	www.autospeed.com /cms/A_1025/printArticle.html (219 words)

	CTS News Release
		The use of integrated electronic throttle control pedals in automobiles is rapidly increasing, with the annual market expected to be over $220 million by 2008.
		Electronic Throttle Control Systems are replacing conventional mechanical throttle control systems because they improve fuel economy, reduce emissions and enable the use of other innovative technologies such as adaptive cruise control and traction control systems.
		The ETC Pedal Assembly is mounted in place of the existing accelerator pedal and converts mechanical pedal movement into an electronic signal.
	www.ctscorp.com /CHN/publications/press_releases/nr030516.htm (559 words)

	Truck Owner Network Electronic Throttle Control (Site not responding. Last check: 2007-11-04)
		With Electronic Throttle Control there is only an electronic signal to control the throttle valve and the engine's air intake.
		ETC consists of an accelerator pedal module (a potentiometer) containing sensors that interpret driver-acceleration intent information and translates that into an electronic signal that is sent to the Powertrain Control Module.
		ETC is a much more sophisticated way of controlling throttle position.
	www.gmcanada.com /english/vehicles/gmc/ton/arti12pg1.html (266 words)

	Electronic throttle control linkage with limp home mechanism (Site not responding. Last check: 2007-11-04)
		A throttle control device is аttаched to a first shaft and rotаtes to control air intake.
		NormaIIy, the ETC саn prevail over the sрring and the stop braсket is forced in opposition to the cam suсh thаt stop braсket соntaсts the cam to describe a cIosed throttle роsitiоn.
		If the ETC becomes halted, here is nоt enough fоrсe to prevail over the sрring and go the sector gear to the cIosed throttle роsitiоn, insteаd the sector gear remаins at the subsequent stop роsitiоn to give the limp home engine idIe speed thаt lets a driver to adequately maneuver the car.
	www.patentalert.com /docs/530/z53013199.shtml (279 words)

	Throttle Commander Throttle Controls (Site not responding. Last check: 2007-11-04)
		Throttle Commander is one of the industry accepted component brands of the innovative Underhood VR70 Air Power System.
		These units control the engine idle speed on trucks with drive by wire mimicking the signal sent from the gas pedal so that the onboard truck computer receives the same signal as if someone was depressing the pedal.
		It prevents the Throttle Control from engaging unless the transmission is in Park.
	www.vmac.ca /throttle/index.htm (635 words)

	Electronic Throttle Control - Taylor Dynamometer
		The Electronic Engine Throttle interface module is designed for use on Detroit Diesel (DDEC II, III and IV) and Caterpillar (HEUI) electronically controlled engines.
		Taylor's Pneumatic Throttle Control allows for remote control of the engine throttle and is designed to work with any make or model of engine that uses a mechanical throttle.
		The Pneumatic Throttle Control can be directly actuated by either a mechanically operated hand-lever or through Taylor's DynPro data acquisition and control system.
	www.taylordyno.com /eng/throttlecontrol.php (172 words)

	Williams Controls Awarded Electronic Throttle Control Business For Corvette (Site not responding. Last check: 2007-11-04)
		This is the first automotive ETC contract that has been awarded to Williams Controls, the predominant supplier of ETCs to the heavy truck market for the past decade, as the company executes its strategy to penetrate the automotive market.
		Williams Controls created its ETC technology for the heavy truck and off- road markets in 1986 and has supplied ETC systems to General Motors heavy truck division in the past.
		It establishes Williams Controls as a major player in supplying automotive ETCs and enhances our ability to supply our traditional markets on a more effective basis." "We believe that Williams was awarded this business, in large part, due to our long and successful history in the heavy truck ETC market," stated Mr.
	www.theautochannel.com /news/press/date/19990519/press023602.html (623 words)

	Williams Controls
		Whether it is for commercial vehicle, off-road or recreational applications, Williams can design an electronic throttle control to meet the most demanding specifications.
		The firewall mounted WM540 electronic suspended pedal is designed to provide an electrical signal to an engine control module in response to the operator's demand for engine power.
		The WM531 is a mechanical-over-electronic control device that provides an electronic signal proportional to a mechanical input.
	www.wmco.com /products/index.cfm?fuseaction=throttle (292 words)

	DURA: Home - Products - Control Systems - Driver Control Systems (Site not responding. Last check: 2007-11-04)
		That's why control systems and driver controls are areas that automakers focus on with intensity.
		The DURA Electronic Parking Brake, for example, is an innovation using a console or dashboard pushbutton instead of the traditional hand or foot lever.
		With the latest technology in electronic control units, cable systems, and high technology driver controls, DURA is the logical choice for your next pedal system development.
	www.duraauto.com /include/template.cfm?ID=15 (641 words)

	Electronic Throttle Control (Drive By Wire or Fly By Wire)
		This was achieved by imputing minimal data into the vehicle's ECM via a serial link from the electronic throttle actuator's separate control unit, as illustrated below.
		The photograph on the left shows the throttle pedal assembly with the potentiometers attached to the side.
		The waveform shown in the example trace shows the throttle moving from idle to WOT (Wide Open Throttle) and back once again to idle.
	www.picotech.com /auto/applications/electronic_throttle_control.html (865 words)

	Autoparts Report: Hella To Produce Electronic Throttle-control Sy... @ HighBeam Research (Site not responding. Last check: 2007-11-04)
		Hella is Europe's leading producer of electronic throttle control systems with a 70 percent market share, the company said.
		"Electronic throttle control systems generally are considered to be safer, easier to assemble, more reliable and overall less costly to produce than the mechanical systems they are replacing," Miskovich said.
		Hella is a tier one supplier of lighting, electronic equipment, sensors and complete vehicle front-end modules to the auto industry.
	static.highbeam.com /a/autopartsreport/august172000/hellatoproduceelectronicthrottlecontrolsystemsinne/index.html (495 words)

	Century Performance Center's Tech and Support Forums - Electronic Throttle Control Throttle Body
		I'm told that the existing upper plenum on the 3.8L is only designed for ETC throttle bodies, and will not accept any cable throttle bodies.
		As far as throttle control, I'd keep the electronic throttle and add the APP (accelerator pedal position) sensor.
		If you must keep the cable operated throttle, most of the S2 3800's were cable operated throttle.
	www.centuryperformance.com /forum/topic.asp?TOPIC_ID=204 (461 words)

	3-line control systems (Site not responding. Last check: 2007-11-04)
		Such deficiencies are usually limited to a throttle that cannot be left 'unattended': a constant throttle setting must be maintained by the pilot by keeping a constant finger position, and this will be due to unbalanced residual forces within the system.
		Elevator control was independent of throttle control, throttle settings were able to be left at any position and all 3 control lines were kept under equal tension.
		An alternative to the vagaries of 3-line control is to use electronics, with electrical signals passed down the wires and a servo at the model end operating the throttle.
	www.cheffers.co.uk /3line.html (507 words)

	Kolbenschmidt Pierburg North America
		The ETC's unique design combines the functions of a mechanical throttle body, cruise control and idle air in a single, self-contained unit.
		Hradowy noted that the use of electronic throttle control is critical in advanced drive-by-wire systems, allowing automakers to take full advantage of the precise engine performance offered by computer-controlled, engine-management systems.
		The needle bearing and DC motor of the new ETC were designed to better the competition in durability.
	www.pierburginc.com /pn_022605_a.html (420 words)

	CDC-980642 (Site not responding. Last check: 2007-11-04)
		Abstract: Nonlinear control methods for automotive electronic throttle control system (ETC) are developed using the theory of sliding-mode servo control.
		The motivation for this research stems from the fact that the ETC shows highly nonlinear property due to two springs mounted for fail-safe, and that the rise time is required to be as small as possible without overshoot.
		It is shown that the sliding mode control is effective for such a situation.
	nt1.rsip.lsu.edu /cebopenweb/conferences/cdc98/program/Manuscripts/CDC-980642.htm (90 words)

	Electronic Throttle Control Encyclopedia Article, Description, History and Biography @ LocalColorArt.Encyclopedia.com (Site not responding. Last check: 2007-11-04)
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	encyclopedia.localcolorart.com /encyclopedia/Electronic_throttle_control (544 words)

	ETC, ETC . . . Delphi electronic throttle control packaged for LS1
		So when electronic throttle control became a viable option to allow for easier packaging as well as provide responsive acceleration, the engineers just had to have it.
		ETC, which is beginning to appear on high-end vehicles, replaces the cables connecting the throttle to the accelerator pedal.
		On the LS1, ETC also integrates cruise control, brake torque management and traction control into a single controller.
	waw.wardsauto.com /ar/auto_etc_etc_ (686 words)

	Teleflex Electronic Throttle Enhances Engine Management
		Electronic Throttle Control (ETC) pedal systems are a preferred technology because of their ability to enhance overall engine management while reducing the assembly costs of the accelerator pedal system.
		Teleflex says the benefits of electronic throttle control include: reduced vehicle emissions; enhanced fuel economy; elimination of costly complex mechanical linkages; improved vehicle packaging and serviceability; integrated cruise control and traction control.
		Teleflex ETC links the engine controls with two sources of electrical signals from the pedal assembly: an idle mode "go/no-go" limit switch provides a positive ideal mode signal whenever there is no driver foot pressure on the pedal.
	waw.wardsauto.com /ar/auto_teleflex_electronic_throttle (535 words)

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