Popular articles

How can you tell diesel quality?

How can you tell diesel quality?

You just require a test vial, a sampling pipette, and an oxidation catalyst. Pipette out 10 millimetres of diesel in the vial, introduce the oxidation catalyst to it. If the fuel is old, it will turn dark within twenty minutes. It is worth mentioning that oxidised diesel leads to tank sludge and filter plugging.

What is High Speed Diesel?

High Speed Diesel (HSD) HSD is normally used as a fuel in medium and high speed compression ignition engines (operating) above 750 rpm) in commercial vehicles, stationary diesel engines, locomotives and pumps etc.

What should AFR be at idle?

How does it affect performance?

Gasoline AFR Methanol AFR
Cruise 14.7-15.5 6.4-6.8
Idle 13.5-15.0 6.0-6.6
Stoich 14.7 6.4
WOT 11.5-13.3 5.1-5.8

Which air cleaner is considered to be most effective in diesel engines?

Oil bath type

What is the best density of diesel?

Fuel Density@15°C – ρ –
(kg/m3) (lb/ft3)
Diesel 2D1) 849 53
Diesel 4D1) 959 59.9
EN 590 Diesel 2) 820-845 51-53

What is density in diesel?

2.3. The density of petroleum diesel is about 0.85 kg/l – about 15–20% higher than the density of gasoline, which has a density of approximately 0.70–0.75 kg/l.

What is the difference between diesel and high speed diesel?

HSD is normally used in the engine which runs above 750rpm such as in buses, locomotives, trucks etc. And LDO is used in below 750 rpm engines. Generally it is used in steady engines or to burn in furnace. The one which we get on petrol pumps/diesel pumps across the nation is HSD.

How rich is too rich AFR?

Long story short, since that seems to be what you are looking for, is anything more rich than 9.99:1 is too rich. Under boost you should shoot for 10.5/12-1, going leaner with caution and a knock detector. I’d say any richness greater than 8:1 may be unwise. No damage will occur from running AFRs in the 10.

What is a bad air fuel ratio?

If the ratio is too rich or too lean, the engine will not burn optimally burn the air-fuel mixture which can cause performance issues or use up too much fuel. The ideal air-fuel ratio that burns all fuel without excess air is 14.7:1. This is referred to as the “stoichiometric” mixture.

What is low speed diesel?

The low speed diesel engines feature four-cycle and two-valve type simple structure keeping low fuel consumption rate and low NOx emission. The engines are mostly provided to main engines for inland water merchant vessels, fishing boats, navigation training vessels, etc.

What is a good AFR?

Best performance for most vehicles is in the 12.5 to 13 AFR range. Going too rich will have the opposite affect and decrease your performance. Getting up to cruising speed or getting ready to pass someone, you usually are looking for the performance to get up and go. Best performance for most vehicles is around 12 AFR.

What is a rich air/fuel ratio?

The ideal (theoretical) air-fuel ratio, for a complete combustion, is called stoichiometric air-fuel ratio. When the air-fuel ratio is lower than the stoichiometric ratio, the air-fuel mixture is called rich. For example, for a gasoline engine, an AFR of 16.5:1 is lean and 13.7:1 is rich.

When a cold engine is started it requires a mixture?

When a cold engine is started, it requires a _____________ mixture. Explanation: For starting a cold engine, generally a richer mixture is required. 4.

What is scavenging air?

In automotive usage, scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh draught of air or fuel/air mixture for the next cycle. This process is essential in having a smooth-running internal combustion engine.

What AFR makes the most power?

Maximum power is usually found between 12-14:1, but this may be too lean for safety on many engines. For maximum reliability at full power, air/ fuel ratios from 10.5-12.5:1 are considered best, depending on the engine.

What is the minimum cetane rating of a 4 D diesel?


Why rich mixture is required for maximum power?

During Power Range, Engine Requires Richer Mixture, for – Preventing the overheating of engine components, as ENRICHING THE MIXTURE REDUCES THE FLAME TEMPERATURE AND CYLINDER TEMPERATURE.

Is high flow diesel the same as normal diesel?

High flow or not, comes from the same tank. Big truck stops may have more than one tank, but it’ll still be the same fuel in both with an auto switchover. In some cases they may have their premium diesel going only to the low flow pump and the lower spec diesel to the highflows.

Why rich mixture is required for sudden acceleration?

Rich mixture is required to compensate for the charge dilution due toexhaust gases from the combustion chamber. Also, the amount of fresh charge admitted is less due to smaller throttleopening. As the throttle is opened further, the exhaust gas dilution reduces and themixture requirement shifts to the leaner side.

What is cetane rating in diesel fuel classification?

Cetane rating, also known as cetane number is a measurement of the quality or performance of diesel fuel. The higher the number, the better the fuel burns within the engine of a vehicle. The cetane number is similar to the octane rating in that it is a rating assigned to a fuel to rate the quality of its combustion.

What is high engine speed?

High-speed engines, with rated speeds of 900 to 1,200 revolutions per minute, are used in a few cases in ships, but engines of this class are almost always found in small craft such as tugs, fishing vessels, and high-speed ferries.

What is a good AFR at idle?

If you prefer better PERFORMANCE then we suggest to run an AFR of 14:1 or even richer to around 13.5:1. Most stock to slightly modified engines will run just fine at an AFR of 14.5:1 and yield better MPG. If you prefer better PERFORMANCE then we suggest to run an AFR of 13.5:1 or even richer to around 13:1.

What is HSD yard?

HSD stands for High Speed Diesel in oil Industry. HSD (High Speed Diesel) is normally used as a fuel in medium and high speed compression ignition engines that are operating above 750 rpm in commercial vehicles , stationary diesel engines , locomotives and pumps etc.

What is low speed engine?

The low-speed engine is characterized by rated speeds in the range of 80–120 revolutions per minute. In all cases it is a two-stroke engine supercharged by exhaust-gas turbochargers. Whereas medium-speed engines are widely employed ashore, the low-speed engine is almost exclusively a marine engine that is…

What does the blue smoke in diesel engine indicate?

Blue exhaust smoke in a diesel vehicle could still mean oil is being burned, but it could also mean the engine oil is being atomized. High engine oil levels. Worn out piston rings.

How can I make my car run richer?

To run richer put a restricter in the return fuel line small enough to up the fuel pressure . You can make it adjustible so you can control the fuel . The same duty cycle ( stock ECU )with higher pressure will give you more fuel . Note that increased fuel pressure will richen the mixture at idle & cruise too.

What is the best diesel cetane booster?

  1. Editor’s Pick: STA-BIL Diesel Fuel Stabilizer.
  2. Howes Diesel Treat.
  3. Power Service Diesel Kleen + Cetane Boost.
  4. Stanadyne Diesel Performance Formula.
  5. Ford Motorcraft Cetane Booster.
  6. Power Service Diesel 911.
  7. Star Brite Star Tron Gas Tank & Fuel System Cleaner.
  8. Opti-Lube Ag Formula Diesel Fuel Additive.

Which fuel has the highest density?

Liquid hydrocarbons (fuels such as gasoline, diesel and kerosene) are today the most dense way known to economically store and transport chemical energy at a very large scale (1 kg of diesel fuel burns with the oxygen contained in ≈15 kg of air).