Ad
related to: why is my lexus sc430 engine knocking noise problems when running
Search results
Results From The WOW.Com Content Network
The objective of knock control strategies is to attempt to optimize the trade-off between protecting the engine from damaging knock events and maximizing the engine's output torque. Knock events are an independent random process. [8] It is impossible to design knock controllers in a deterministic platform. A single time history simulation or ...
The reduced engine speeds allow more time for autoignition chemistry to complete thus promoting the possibility of pre-ignition and so called "mega-knock". Under these circumstances, there is still significant debate as to the sources of the pre-ignition event. [3] Pre-ignition and engine knock both sharply increase combustion chamber temperatures.
This engine was the same model as that found in the UCF30 Lexus LS. The SC 430's V8 could produce 288 hp (215 kW) and 430 N⋅m (317 lb⋅ft) of torque, allowing the coupe to go from 0–60 mph in 6.2 seconds. [24] 2001–2005 Lexus SC 430
To detect knock, a piezoelectric knock sensor (basically a microphone) bolted to the engine block responds to unique frequencies caused by engine knock. The sensor generates a small voltage that is sent to the electronic control unit , which processes the signal to determine if, in fact, knock is occurring.
SC 430, SC430, or SC-430 may refer to: Konig SC 430 aircraft engine; Lexus SC 430 automobile; Santa Catarina SC-430, a highway in Brazil; South Carolina Highway 430, ...
The 4.0 L (3,969 cc; 242.2 cu in) all-alloy 1UZ-FE debuted in 1989 in the first generation Lexus LS 400/Toyota Celsior and the engine was progressively released across a number of other models in the Toyota/Lexus range. The engine is oversquare by design, with a bore and stroke size of 87.5 mm × 82.5 mm (3.44 in × 3.25 in). [2]
Early research into "engine knocking" (also called "pinging" or "pinking") was also led by A.H. Gibson and Harry Ricardo in England and Thomas Boyd in the United States. The discovery that lead additives modified this behavior led to the widespread adoption of their use in the 1920s, and therefore more powerful, higher-compression engines. [ 16 ]
Now TEL has been removed, we don't seem to have reverted to having a problem with knocking. How so? Was there never really a problem to solve or have we found a modern solution that renders TEL unnecessary? If so it isn't discussed here. Atconsul 16:28, 9 October 2023 (UTC) The potential problem of detonation remains as high as ever.