Search results
Results From The WOW.Com Content Network
The PSA Group sells a variety of diesel automobile engines with the HDi (high-pressure direct injection) designation. Earlier versions were exclusive to Peugeot and Citroën. In 1998, PSA entered into a joint venture with the Ford Motor Company to produce a range of new diesel engines. The joint venture makes identical engines which are fitted ...
Opel also adds the marketing term "Whisper Diesel" in some markets, claiming relatively low levels of noise, vibration, and harshness. Production commenced in late 2013 at Szentgotthárd, Hungary. The MDE is Opel's first all-aluminum diesel engine and offers a power density of 85 hp (63 kW) per liter 136 PS (100 kW; 134 hp) in its most powerful ...
Hexamethylene diisocyanate (HDI) is the organic compound with the formula (CH 2) 6 (NCO) 2. It is classified as an di isocyanate . It is a colorless liquid. [ 2 ]
As a result, this engine exhibits rougher behaviour, producing more vibration and noise. On the other hand, it has a superb torque output thanks to the addition of the Rocam (roller finger camshaft) feature. In 2003, the Zetec-Rocam engine was introduced in Europe, but labeled as Duratec 8v, for the SportKa and StreetKa models. Later a 1.3 L ...
The noise power from a simple load is equal to kTB, where k is the Boltzmann constant, T is the absolute temperature of the load (for example a resistor), and B is the measurement bandwidth. This makes the noise figure a useful figure of merit for terrestrial systems, where the antenna effective temperature is usually near the standard 290 K ...
The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
Quantified noise is similar to classical noise theory and will not always return an asymmetric spectral density. [ 1 ] [ clarification needed ] Shot noise as coined by J. Verdeyen [ 2 ] is a form of quantum noise related to the statistics of photon counting , the discrete nature of electrons, and intrinsic noise generation in electronics.
One definition of signal-to-noise ratio is the ratio of the power of a signal (meaningful input) to the power of background noise (meaningless or unwanted input): =, where P is average power.