High torque: Heavy vehicles are used to carry a high load like goods and passengers, hence these vehicles require high torque at low speed. Diesel engines can provide high torque than petrol engines hence diesel engines are preferred for heavy vehicles.
Why diesel engines are used in heavy vehicles?
Heavy vehicles can employ heavy engine without much weight issue. Diesel engines are much heavy as they have twice the compression ratio of petrol engine. They generate high pressure in engine thus higher torque on low rpm. In heavy vehicles need is for high torque not power.
Why SI engine is not used in heavy vehicles?
It is not suitable for heavy vehicles because by burning of petrol it gives lot of energy in a short time. At this circumstances, the vehicles has to move quick but due to heavy load it cannot as a result the cylinder may burst. Energy released by the burning of fuel must be utilised simultaneously.
What is the disadvantage of diesel engine?
Cons of diesel cars
Diesel fuel usually costs more. Servicing can be more expensive, although you don’t need to do it as often. Diesel cars produce a lot more NO2. Diesel engines can be slightly noisier.
Why diesel is not used in bikes?
Diesel has the potential to generate more energy than petrol. When the diesel burns in the engine, the heat is so high that it can damage the cylinder and surface of the light engine. A larger engine is needed to reduce heat, which cannot be applied to a bike.
Why is petrol used in lightweight vehicles?
HERE THE ANSWER… Diesel engines have higher torque because of their larger piston travel (stroke), hence they have higher load carrying capacity making them useful for trucks. … petrol engine basically used for high speed(low load) vehicles like car, motorcycle.
Is a diesel engine better than petrol?
Diesels are more fuel efficient than petrol engines and emit less CO2, which makes them better for the environment. Diesels produce considerably more torque (pulling power) than their petrol counterparts, which makes them good engines for towing or carrying heavy loads – ie: seven occupants – on a regular basis.
Is a Paccar engine a Cummins?
The Cummins 4- and 6-liter engines, badged as PACCAR, are exclusive in the DAF LF product. … Loughrey noted, Cummins was the first diesel engine installed in Kenworth in 1933 and this agreement continues the legacy of innovation and market leadership between the two companies.
Which is better Duramax or Cummins?
More horsepower means faster acceleration whether you’re towing or not. The current Duramax 6.6L L5P diesel wins this category with 445 horsepower. The current 6.7L 24V Ram Cummins diesel engines produce 400 horsepower. Historically, horsepower has swayed slightly in favor of the Duramax versus the Cummins line.