A trip computer is a

computer A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations ( computation) automatically. Modern digital electronic computers can perform generic sets of operations known as programs. These prog ...

fitted to some cars; most modern trip computers record, calculate, and display the distance travelled, the average speed, the average fuel consumption, and

real-time Real-time or real time describes various operations in computing or other processes that must guarantee response times within a specified time (deadline), usually a relatively short time. A real-time process is generally one that happens in defined ...

fuel consumption. The first, mechanical trip computers, such as the

Halda Halda Watch Company is a Swedish manufacturer of high-end watches. It was founded in 1887 by Henning Hammarlund in Svängsta. History Halda was founded in 1887 by the factory owner Henning Hammarlund (1857-1922) in order to primarily pro ...

Speedpilot, produced by a Swedish taximeter manufacturer, were made in the 1950s as car accessories to enable the driver to maintain a given time schedule, particularly useful in rallying. One was installed as standard equipment in the 1958 Saab GT750. The 1952

Fiat 1900 Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...

came standard with a complex mechanical device, called ''mediometro'' in Italian, that showed the average speed. In 1978, the

Cadillac The Cadillac Motor Car Division () is a division of the American automobile manufacturer General Motors (GM) that designs and builds luxury vehicles. Its major markets are the United States, Canada, and China. Cadillac models are distributed ...

division of

General Motors The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...

introduced the "Cadillac Trip Computer", available on the

Cadillac Seville The Seville was manufactured by Cadillac from 1975 to 2004 as a smaller-sized, premium model. It was replaced by the STS in 2004. Origin of the name The name of "Cadillac's first small car" was selected over a revival of LaSalle or the GM de ...

;

Chrysler Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automotiv ...

also launched an electric trip computer on its low-end Omni/Horizon. They can range from basic to complex. The most basic trip computers incorporate average fuel mileage and perhaps an outside temperature display. Mid-range versions often include information on fuel, speed, distance, cardinal heading (compass), and elapsed time. The most advanced trip computers are reserved for high-end cars and often display average calculations for two drivers, a stop watch, tire-pressure information, over-speed warnings, and many other features. Sometimes the trip computer's display is in the gauge cluster, the dashboard or navigation-system screen, or an overhead console. Some displays include information about scheduled maintenance. The current

Acura TL The Acura TL is an executive car that was manufactured by Acura, the luxury division of Honda. It was introduced in 1995 to replace the Acura Vigor and was badged for the Japanese-market from 1996 to 2000 as the Honda Inspire and from 1996 to 200 ...

does this in stages, first alerting the driver with a "Due Soon" message; once the programmed mileage is reached, the message is "Due Now"; when more time or distance has elapsed, the message changes to "Past Due". Mercedes-Benz vehicles constantly monitor the quality of the oil and alert the driver when the oil has degraded to a certain extent. GM and FCA vehicles provide oil change alerts based on the number and length of trips, engine temperature, and other factors. Some vehicles also use the trip computer to allow owners to change certain aspects of vehicle behavior, e.g. how the power locks work, but in most cars "setting preferences" is now done through a center screen also used for the backup camera and radio. Some trip computers can display the diagnostic codes that mechanics use. This is especially useful when the mechanic wants to see the codes while driving the car. In 2004, Linear Logic developed the ScanGauge, which at the time was the only easily installed (via OBDII) accessory that worked as a trip computer, 4 simultaneous digital gauges, and a diagnostic trouble-code reader. This device has available 12 different measurements which can be used as the 4 digital gauges. The units of measure can be independently selected between miles/km, gallons/liters, Celsius/Fahrenheit, and PSI/kPa. In 2008, the OBDuino project announced a low-cost

DIY "Do it yourself" ("DIY") is the method of building, modifying, or repairing things by oneself without the direct aid of professionals or certified experts. Academic research has described DIY as behaviors where "individuals use raw and sem ...

trip computer design using the OBDII interface and the

Arduino Arduino () is an open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices. Its hardware products are licensed under ...

hobbyist microcontroller platform, released under the GPL open source license.

References

{{Car-interior Auto parts Automotive accessories Automotive electronics Measuring instruments Onboard computers

See also

References