"Delay Box" is a general slang term used in drag races to describe the timer on the board which is the Transmission Output Brake Delay. A transbrake forces the race car to remain stationary at the start line, in the gear, regardless of how much machine power is applied. When a visual signal is given to start the race, the driver triggers a snooze box to start timing (precisely counting down). If the driver does not interfere with the device at this time, the car is launched to a race track when the timing expires (calculated to zero). The use of the snooze box was highly controversial in the 1980s and 1990s, as it erased some of the benefits that experienced riders had. There are times when technologists add and hide the homemade circuitry in the snooze box that violates some rules of the racing association. The racing association has imposed strict limits on today's delay boxes, with manufacturers having to file an approval process, which has drastically reduced the number of makers of this device.
Video Delay box
Mekanisme
The delay box serves as an on-board timer for transmission brakes (commonly referred to as "trans-brake"). Transbrake is part of the automatic racing transmission used in drag races, and is not found in manual transmissions. The electronic timer is packed in a metal enclosure when it is sold to drag the racer, so the slang terminating box. This timer box is a very accurate type of monostable multivibrator (electrical engineers also call this type of multivibrator as "one shot"). The timer box works like a time-delay relay. Many of the delay boxes actually have an internal relay to divert the output current, but some models have solid state transistor output circuits. The transistorized type made today almost always uses the MOSFET type output power. Drag racing delay box is designed to operate from a 12 volt DC power system vehicle. Some drag racing cars now use a 16 volt DC system, in such a scenario the delay box should be able to work well from 16 volts DC, as well as 12 volts DC.
The race car racer holds the switch press the electric button pressed with the finger or thumb of his right or left hand until he sees the desired visual cues. The electric pushbutton switch is monitored by the snooze box. As long as the car racer holds the pushbutton, the delay box sends 12 Volt DC (or 16VDC) in many Amperes to a racing car transmission (where the internal electromagnetic solenoid located on or on the transmission energizes, which in turn positions the spool valve that directs the hydraulic fluid pressure in a valvebody transmission that locks the transmission at the forward and reverse gear at the same time).
When the transbrake moves at the start line of the drag race race (the driver holds the button pressed), the car remains stationary regardless of how much machine power is applied to the drive line. The driver usually uses the current full speed, and the car remains stationary at the starting line under full engine power. When the driver sees the desired visual cues in front of him, the driver immediately releases his finger (or thumb) from the pushbutton. This release button will open a contact in a push button that flags the snooze box and the start delay box counts internally. When the countdown timer reaches zero, the delay box stops flowing current to the solenoid in the transmission and causes the spool valve to return to its normal position. With the spool valve in the normal position the hydraulic fluid pressure in the transmission is removed from the inverted clutch package (but retained in the clutch package forward), this causes the drag racing car to "launch" (often with great thrust) from the beginning of the line, finish line.
Maps Delay box
History
The delay box began to appear in race cars in the 1980s. The starting unit is a timer in a sheet metal box with an analog potentiometer and a locking nut to set the setpoint without reading or feedback for the driver. This initial unit uses a resistor/capacitor charging scheme to trigger the unijunction transistor to release the electromechanical relay. Such drag racing timers are very rough by today's standards. Nolen (IKE) Hamma is credited with introducing such early devices to drag races. (currently DBA as Digital Delay, INC.) Ike Hamma is dead. His family was assigned a patent for a kind of delay timer, his son Charlie Hamma is the current president of Digital Delay Inc., producer of drag racing timers. Other entities contribute to the delay-box technology and also have Intellectual Property. Some of these other entities have a deferred box patent (Reid and Furrow), some entities are not pursuing patents for their invention even though their inventions may have preceded those known to the patent holder.
In the late 1980s the unit began to appear in the digital market in natural rendering of analog, unijunction, R/C timer designs obsolete.
New digital timers use decimal or binary decatted thumbwheel switches to set the countdown timer value in digital logic. The thumb wheel also provides visual numerical value feedback that the racecar driver can use to help him calculate the exact settings. The popular early digital unit of this type was designed and manufactured by Robert Furrow (B. F. Electronics Weatherford, Oklahoma). Robert Furrow's delay box uses quartz crystals for timing accuracy and integrated circuits Transistor-transistor logic (TTL). Furrow's digital delay box is a substantial increase in accuracy and ergonomics but suffers in reliability. In the United States, many timers delay Electronics B.F. sold nationally.
Shortly after, the first microprocessor-based box delay timer was introduced by Richard Beutnagel (Thorn Microsystems in Rochester, NY). The design of Richard Beutnagel also uses a quartz crystal time base for accuracy but without TTL glue logic. Thorn Microsystems units use Intel single chip microcomputers, professionally made two-sided printed circuit boards with layered holes, large BCD handheld switches, and solid solid bipolar output circuits (without electromechanical relays). Thorn Microsystems design reduces the number of parts to "one chip" and one power transistor substantially reduces the interconnected solder PCB (printed circuit board) for significant improvements in reliability. Firmware embedded in Intel's microcontroller chip performs all the required time and control functions of the snooze box with digital accuracy of quartz crystals.
Many new TTL and CMOS glue logic designs continue to appear in the market for several more years. Names like Meziere, Terminator, K & amp; R, ATI, Digital Delay (Ike Hamma), Biondo, Davis, D & amp; D (Danny Duberry) and other prominent figures in the history of the drag racing delay box. Some types of glue logic designs have large LED (light emitting diode) readouts to display timer settings, others display an attractive LCD backlight (liquid crystal display), others use thumbs of various sizes and qualities. All the delay boxes on the market were precise quartz crystals in 1990. Several years passed before other delay-box designs appeared with embedded microprocessors.
Today, almost all delay delay race boxes are microprocessors based on intelligent backlit LCD readings. The most popular models feature internal crossover calculations (allowing the driver to choose visual cues from the opposite side of the Christmas tree, the internal delay box performs simple math calculations for the driver), raise and lower compensation (allowing the driver) to easily make small time adjustments plus or minus quickly and remotely), crossover compensation (offset time that can be set by the driver while crossing), interlock safeguard (prevent delay box from being reactivated once racing car, valuable feature), bypass (feature where delay box is disabled before being able to complete the countdown, so soon launch the car), and other features.
Controversial Use
The use of the snooze box was highly controversial in the 1980s and 1990s, with the height of the controversy that occurred around 1993-1994. This continues until today but the controversy has dropped substantially from its peak. The use of box delays is controversial because experienced riders lose some of the advantages they enjoy over younger and less experienced rivals. The veteran racer who opposed the use of the snooze box complained to the owner of the race track and dragged the body wearing racing sanctions that the delay box was unfair. The use of box delays does not provide an inexperienced driver reaction re- sion so that more experienced drivers need time and money to learn. The drivers of this old time say that the use of the delay box is cheating. The term "cheater box" was heard in the drag race for years. Track owners across the United States began to make separate races on the same race day at their facility by dividing the racers into two groups or classes, box and boxless classes. "Some" racers start hiding the snooze box and enter the no-box class, because it's really cheating.
The use of box delay was initially thought to be limited to transbranted cars. Delayed use of the box by motor drag riders lags far behind that used by car racers. These factors contribute to the delay box controversy because some racers feel the equipment they choose does not match the use of the snooze box. This is not true and educating the bracket racing community takes time.
The reason a significant motor drag rider lags behind in applying the electronic delays of the box due to various driveline configurations on dragbikes. From a successful drag race car, most automatic transmissions are equipped with transbrakes. Innovation quickly adapted the snooze box to the car with a dual channel lock (a device that locks the brakes on all four wheels electrically), and a manual transmission using a hydraulic throwing pad to hold the clutch plate, and also adapted to pneumatic or hydraulic dragbikes to drive discharge clutch, or centrifugal dragbike coupling known as the "slider hook" involved with per minute machine rotation (RPM). When using a snooze box on a motorcycle with a clutch slider, the engine RPM is electronically controlled (limited) by an electronic rev barrier connected to the snooze box. When the delay time runs out, the engine is left free to clutch and launch the motorcycle. As you can see, the snooze box can be used on cars and motorcycles. Transmission brakes are not required to use the snooze box for drag races. When the racer is educated for this, and also shows how to utilize the delay box on a motorcycle, there are some pitfalls of the initial controversy.
The delay box increases the accuracy of the initial line reaction time for the driver. Box delays do not do this independently. Driver interaction is still needed to launch the vehicle and driver skills are still needed to achieve favorable reaction time. A small number of drag racers take to add to the delay box, or technology paid for the circuit to do so. This racer hides a custom electronic circuit that is customized in the cage box delay in a hidden way that does break some drag racing rules. Modifications involve circuits that improve the consistency of Elapse Time race cars. Time Elapsed Vehicles are separate, but equally important, variables to win the bracket race. Unethical and unethical home-made circuits carry a closed-loop control of the elapsed Time Pass (ETA). Control of electronic vehicles of this type is prohibited for breaking the rules by automatically performing tasks on board that are not triggered by the driver. This circuit is inserted into the enclosure box of commercial delay by the end user as the desired hiding place. Such home-made circuits create "turmoil" from electronic-related controversies in drag races, besides, and stain the tug box unfairly. If this unethical home-made circuit is hidden elsewhere (or never made), the delay box is likely to avoid regulatory action.
Rule
The damage became so widespread in the 1990s that the National Hot Rod Association (NHRA) required delayed box manufacturers to make delay boxes more difficult to modify by end users, and shrink enclosures so there was no room for additional content. Sealing the enclosure of the delay box so it will be easy to see if it is tampered also is part of the process. NHRA also creates rules that determine how the drag racer electrically distributes the racing car, which requires drivers to leave the cables unclassified so they can be quickly and easily traced by the eye. Rules are also made to limit how many interconnects can be attached to the wire between the snooze and transmission box. NHRA track officials are authorized to check cables to make sure they meet new rules. NHRA has also begun to ask the manufacturer of the delay box to pay the fees and submit the design of the delay box for NHRA approval. Then NHRA instituted a rule allowing only NHRA-approved delay boxes on its race tracks. This includes disclosing trade secrets to NHRA, while NHRA refuses to enter into Non-Disclosure Agreements with boxed-in manufacturers. Upon submission for NHRA approval, and paying fees, making the delay box is not permitted to make changes in the design for any reason without resubmitting to NHRA for re-approval and paying other fees. To obtain NHRA approval, the tugs manufacturer must accommodate NHRA by making design changes mandated by NHRA. Basically NHRA is now designing a delay box by proxy. Furthermore, the drag race is prevented from using any snooze boxes they make themselves at home. It changes the face of drag racing in a big way. Traditionally, drag racing grass roots are where drivers can build chassis, engine, transmission, differential, pipe & amp; vehicle cables, etc. Skilled riders can build their own racing cars with their own hands from wherever they get them. Racers do not have to buy anything they have made if they do not want to. Those days became history almost overnight. Almost all racing innovations (electronic or mechanical) are now questionable and can lead to disqualification. The NHRA track can deny the ability to race on their tracks if they see something being made themselves in a race car. The road to the race with the least worry being disqualified is buying everything for the car from an approved NHRA manufacturer (other sanctions are quickly following, such as IHRA, NMCA, etc.).
Only a handful of delayed box manufacturers are willing to pay NHRA's mailbox approval fees and submit designs for NHRA approval without obtaining confidentiality agreements. Also not many delay box manufacturers want to be forced to meet the demands of NHRA design changes. These manufactures are immediately out of business or diverted to non-racing-related markets. As a result, very few companies produce snooze boxes for today's drag races and any designs close to their functionality to the next. The reduced competition allows some of these companies to enjoy the whole market for themselves. Innovation almost stopped in the market. Approved delay box manufacturers also enjoy the bonus of reduced market competition for other on-board racing timers such as: throttle stop timer, data recorder, timer shifter, RPM switch, electronic nitrous oxide injection controller and device other. Delay box manufacturers that do not receive NHRA approvals are closed from all electronic drag race markets.
As mentioned above, in the first paragraph under "Controversial Use", many drag racing line operators begin dividing race days into "squares" and "no class" boxes, with "no box class" prohibited from using any type of snooze box in their race car. However, the electronic timing track system is still used for the "no box class" which means that a deceptive racer would rather easily hide the delay box somewhere in his car (or the person), and have an unfair advantage over his competitors. Therefore, racing track operators create a monumental task to enforce rules against electronic devices in Bracket Racings "without box class", and thus, rarely pursue law enforcement. As the track operator tries to catch the fraudsters with a "no-box" class timer, enforcement tasks can be very complicated and the results are usually controversial. This creates tension between all the racers and between racers and track operators as well.
The popular US cable television program "Pinks" (Speed ​​Channel) uses a TV show host as a flagman with the technique of falling arms at the starting line (plus the finish line of the human claimant, and the "finished photo" camera similar to that used in horse racing and dog racing). It simulates the history of the post-WWII 1940s racing drag race, and non-electronic drag races in the 1950s and 1960s. The snooze box is useless in Pink, since the first trajectory is run with a Pro tree (.400 three amber) than the Standard Tree (.500 per light), and the second run and all the elimination is run with a drop of arm, which forces the driver to launch on the host order , and not with a snooze box.
Source of the article : Wikipedia
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