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DID YOU KNOW
trucks are classified by their gross
vehicle weight (GVW). GVW is the maximum allow able weight of the vehicle plus the weight of the load it
can safely carry

Diesel Cycle Process With P-V and T-S Diagram

The 4 process are as follows
1 Isentropic compression
2 constant pressure heat addition
3 Isentropic expansion
4 constant volume heat rejection

👉 Process 1-2: Isentropic Compression
In this process the piston moves from BDC to TDC and compression of air takes place isentropically. It means that during compression the entropy remains constant and there is no flow of heat out of the cylinder walls (non-conductors) happens. Here the air is compressed so the pressure increases from P1 to P2, volume decreases from V1 to V2, Temperature increases from T1 to T2 and entropy remains constant ( i.e. S1 = S2).

👉 Process 2-3: Constant Volume Heat Addition
In this process the, the hot body is kept in contact with the cylinder and heat addition to the air takes place at constant pressure. During this process, the piston rest for a moment at TDC. The pressure remains constant (i.e. P2 = P3), volume increases from V2 to V3, temperature increases from T2 to T3, entropy increases from S2 to S3.

👉 Process 3-4: Isentropic Expansion
In this process, after heat addition, the expansion of air takes place isentropically and work is obtained from the system. The piston moves downward during this process and reaches to BDC. The pressure falls from P3 to P4, Volume increases from V3 to V4, the temperature falls from T3 to T4 and entropy remains constant (i.e. S3=S4).

👉 Process 4-1: Constant Volume Heat Rejection.
In this process, the piston rest at BDC for a moment and the cold body is brought in contact with the cylinder and the heat rejection takes place at constant volume. The pressure decreases from P4 to P1, temperature decreases from T4 to T1, entropy decreases from S4 to S1 and volume remains constant (i.e.V4 = V1

Four-Stroke Diesel Engine
The typical sequence of cycle events in a four-stroke diesel engine involves a single intake valve, fuel-injection nozzle, and exhaust valve, as shown.
Injected fuel is ignited by its reaction to compressed hot air in the cylinder, a more efficient process than that of the spark-ignition internal-combustion engine