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Tachometer (left) of a Volkswagen Golf Mk6 passenger car idling at just below 800 r/min.. Idle speed, sometimes simply called "idle", is the rotational speed an engine runs at when the engine is idling, that is when the engine is uncoupled from the drivetrain and the throttle pedal is not depressed.
You may idle while waiting in a drive-through line, picking up a curbside order or dropping off the kids at school or when you're stuck in standstill traffic. Though idling is common, it's not ...
Redlining is riding or driving an automotive vehicle above the redline. The actual term redline comes from the red bars that are displayed on tachometers in cars starting at the rpm that denotes the redline for the specific engine. Straying into this area usually does not mean instant engine failure, but may increase the chances of damaging the ...
The sources of variability in IRI data include the difference among the readings of different runs of the test vehicle and the difference between the readings of the right and left wheel paths. [ 4 ] [ 5 ] Despite these facts, since its introduction in 1986, [ 6 ] [ 7 ] [ 8 ] the IRI has become the road roughness index most commonly used ...
Dieseling or engine run-on is a condition that can occur in spark-plug-ignited, gasoline-powered internal combustion engines, whereby the engine keeps running for a short period after being turned off, drawing fuel through the carburetor, into the engine and igniting it without a spark.
Although the IAC is supposed to last the vehicle's lifetime, various reasons may cause it to fail/malfunction prematurely. The most common failure mode is partial/complete jamming of the actuator (due to dirt/dust or even oil) where it cannot be smoothly controlled. The result is an engine that fails to maintain idle RPM and frequently stalls.
A lean burn mode is a way to reduce throttling losses. An engine in a typical vehicle is sized for providing the power desired for acceleration, but must operate well below that point in normal steady-speed operation. Ordinarily, the power is cut by partially closing a throttle.
German car manufacturers were relatively slow to adopt V6 engines, because engineers believed that they lacked the smoothness of an inline-6 engine. Eventually, the first German V6 engine was a 2.8 liter 90 ° V6 that was launched in the 1990 Audi 100 , and the narrow-angle VR6 , which was introduced across Volkswagen's mid-size and sports car ...