This presentation delves into the intricate workings of fuel injection pumps, essential components in the operation of internal combustion engines. Attendees will gain insights into the functionality, types, and significance of fuel injection pumps in optimizing engine performance and efficiency. Through clear visuals and concise explanations, key topics such as fuel delivery systems, injection timing, and pump design will be elucidated, providing valuable knowledge for engineers, technicians, and enthusiasts in the automotive and diesel engine industries.

1. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING SIR ROJANE F. BERNAS
Fuel Injection Pump
ROJANE F. BERNAS, PhD.
SIR ROJANE F. BERNAS

2. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Discussion
Outline of the Discussion
1. Function of injection pump
2. Procedure in installing injection pump

3. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Functions of Fuel injection pumps
• The fuel injection pump is a mechanical device that
introduces the fuel into the cylinders of automotive engines.
• It works as a heart of a diesel engine and maintains its
rhythm to keep it running smooth for years.
• It is also responsible for controlling the fuel flow to gain the
desired power.
• The fuel injection pump is traditionally driven indirectly from
the crankshaft by gears, belts, and chains, anything that
drives camshafts.

4. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING

5. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Four major functions
1. The major job of injection pumps is to feeds the fuel. It
compresses the fuel to high pressure where cam lifts the
plunger and then sent it to the injector.
2. It adjusts the fuel quantity. If the quantity of fuel which is
injected is changed with engine speed and its timing
remains the same, the outcome and the fuel dissipation will
change. As the output of the engine is in proportion with
injected fuel quantity, this is adjusted with the accelerator.

6. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Four major functions
3. Another important function is to adjust the injection
timing. It manages the timing from the point where fuel is
injected, ignited and combusted when maximum
combustion pressure is reached.
4. Lastly, it atomizes the fuel in order to improve the ignition
which results in complete combustion.

7. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Types of fuel injection pumps
INLINE PUMPS
• Often known as jerk pumps, these pumps
are built from separate pumps with
plunger units connected inline, one per
cylinder. Such kinds of injection pumps
are activated through a cam mechanically
connected to the engine and look pretty
much similar to mini inline engines.

8. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Types of fuel injection pumps
DISTRIBUTOR INJECTION PUMPS
• These types of injection pumps have
one fuel metering plunger. In these
pumps, a spinning rotor makes a
hydraulic connection with the different
ports on the distributor’s head. Due to
the fact that it comes with a single
plunger and all the fuel shots are
same, these come with the smaller
overall package. Moreover, distributor
pumps have less moving parts as
compared to inline injection pumps.

9. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Types of fuel injection pumps
COMMON RAIL INJECTION PUMPS
• In common rail fuel injection, it ost its
power to decide when the pressurized
fuel will be delivered and at what
quantity. It is a direct fuel injection
system for diesel and petrol engines.

10. SIR ROJANE F. BERNAS AUTOMOTIVE SERVICING
Types of fuel injection pumps
ELECTRIC PUMPS
• Modern cars come with electric fuel
pumps located inside the fuel tank. It
creates positive pressure in the fuel lines
and pushes fuel to the engine. The cars
with electric motor pumps have
electronic control unit (ECU) and is
programmed with safety logic that will
shut it off.