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Questions and Answers
What primary function does the flow divider serve in the fuel injection system?
What primary function does the flow divider serve in the fuel injection system?
What condition must be met for fuel to flow through the valve in the flow divider?
What condition must be met for fuel to flow through the valve in the flow divider?
At what engine state does the flow divider require only a small opening for fuel delivery?
At what engine state does the flow divider require only a small opening for fuel delivery?
What occurs to the valve in the flow divider when fuel pressure builds up above idle requirements?
What occurs to the valve in the flow divider when fuel pressure builds up above idle requirements?
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What is the role of the diaphragm in the flow divider assembly?
What is the role of the diaphragm in the flow divider assembly?
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How does the regulator impact the flow divider’s operation?
How does the regulator impact the flow divider’s operation?
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What happens to the nozzle lines as fuel flow increases beyond idle requirements?
What happens to the nozzle lines as fuel flow increases beyond idle requirements?
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Which component directly experiences the opposing force due to fuel pressure in the flow divider?
Which component directly experiences the opposing force due to fuel pressure in the flow divider?
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What role does fuel pressure play in the operation of the flow divider valve?
What role does fuel pressure play in the operation of the flow divider valve?
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How is fuel flow to the engine determined when using a pressure gauge with the Bendix RSA injection system?
How is fuel flow to the engine determined when using a pressure gauge with the Bendix RSA injection system?
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What is unique about the configuration of fuel discharge nozzles in the Bendix system?
What is unique about the configuration of fuel discharge nozzles in the Bendix system?
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What is the effect of fuel pressure before the individual nozzles in the injection system?
What is the effect of fuel pressure before the individual nozzles in the injection system?
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What component must engines modified with turbosuperchargers use for fuel discharge?
What component must engines modified with turbosuperchargers use for fuel discharge?
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What is the purpose of mixing fuel with air before it enters the individual intake valve chambers?
What is the purpose of mixing fuel with air before it enters the individual intake valve chambers?
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What determines the size of the calibrated jet for fuel discharge nozzles in the Bendix system?
What determines the size of the calibrated jet for fuel discharge nozzles in the Bendix system?
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How does the outlet of the fuel discharge nozzle function in relation to the intake port?
How does the outlet of the fuel discharge nozzle function in relation to the intake port?
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What is indicated by the pressure measured by the fuel pressure gauge in the context of fuel flow?
What is indicated by the pressure measured by the fuel pressure gauge in the context of fuel flow?
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What happens to the fuel as it discharges through the jet into the nozzle assembly?
What happens to the fuel as it discharges through the jet into the nozzle assembly?
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What is the primary function of the airflow section in the Bendix/Precision fuel-injection system?
What is the primary function of the airflow section in the Bendix/Precision fuel-injection system?
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Which component of the Bendix/Precision system directly opposes the air metering force?
Which component of the Bendix/Precision system directly opposes the air metering force?
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What does the term 'air metering force' refer to in the Bendix/Precision fuel-injection system?
What does the term 'air metering force' refer to in the Bendix/Precision fuel-injection system?
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In the Bendix fuel-injection system, what is the purpose of the fuel flow divider?
In the Bendix fuel-injection system, what is the purpose of the fuel flow divider?
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What is one advantage of using a fuel-injection system over a conventional carburetor system?
What is one advantage of using a fuel-injection system over a conventional carburetor system?
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Which section of the Bendix/Precision fuel-injection system controls the orifice opening for fuel flow?
Which section of the Bendix/Precision fuel-injection system controls the orifice opening for fuel flow?
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What role does the constant-head idle spring play in the Bendix/Precision fuel-injection system?
What role does the constant-head idle spring play in the Bendix/Precision fuel-injection system?
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What adjustment does the manual mixture control valve in the fuel metering section allow for?
What adjustment does the manual mixture control valve in the fuel metering section allow for?
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How does an increase in airflow affect the diaphragm in the Bendix fuel-injection system?
How does an increase in airflow affect the diaphragm in the Bendix fuel-injection system?
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What is the main purpose of the fuel metering section in the Bendix/Precision fuel-injection system?
What is the main purpose of the fuel metering section in the Bendix/Precision fuel-injection system?
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What type of system does the Bendix fuel-injection system primarily utilize?
What type of system does the Bendix fuel-injection system primarily utilize?
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What does the idle valve connect to in the Bendix/Precision system?
What does the idle valve connect to in the Bendix/Precision system?
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What influences the opening of the ball valve in the regulator section?
What influences the opening of the ball valve in the regulator section?
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What is the function of the power enrichment jet in some injector models of the Bendix system?
What is the function of the power enrichment jet in some injector models of the Bendix system?
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What component determines the amount of fuel returned to the fuel pump in the fuel control assembly?
What component determines the amount of fuel returned to the fuel pump in the fuel control assembly?
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Which part of the fuel manifold valve provides the necessary force for moving the diaphragm?
Which part of the fuel manifold valve provides the necessary force for moving the diaphragm?
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What is the function of the ball valve installed within the fuel manifold valve?
What is the function of the ball valve installed within the fuel manifold valve?
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In the fuel system, what is the significance of the fine screen installed in the diaphragm chamber?
In the fuel system, what is the significance of the fine screen installed in the diaphragm chamber?
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How does the plunger valve in the fuel manifold valve operate?
How does the plunger valve in the fuel manifold valve operate?
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What is the role of the diaphragm in the fuel manifold valve?
What is the role of the diaphragm in the fuel manifold valve?
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Where is the fuel discharge nozzle typically located in the fuel injection system?
Where is the fuel discharge nozzle typically located in the fuel injection system?
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Which of the following statements about the fuel charging process is incorrect?
Which of the following statements about the fuel charging process is incorrect?
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What feature is designed into the fuel manifold valve to ensure equal distribution of fuel?
What feature is designed into the fuel manifold valve to ensure equal distribution of fuel?
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What aspect of the fuel flow does the air throttle affect?
What aspect of the fuel flow does the air throttle affect?
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What is the primary function of the diaphragm-type relief valve in the fuel-injection pump?
What is the primary function of the diaphragm-type relief valve in the fuel-injection pump?
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Which component of the Continental/TCM Fuel-Injection System is responsible for controlling the air intake?
Which component of the Continental/TCM Fuel-Injection System is responsible for controlling the air intake?
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In a positive-displacement rotary-vane pump, what does the mechanism trap?
In a positive-displacement rotary-vane pump, what does the mechanism trap?
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How does the fuel-injection system maintain proper fuel delivery at various engine speeds?
How does the fuel-injection system maintain proper fuel delivery at various engine speeds?
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What role does the auxiliary pump play in the Continental/TCM Fuel-Injection System?
What role does the auxiliary pump play in the Continental/TCM Fuel-Injection System?
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What distinguishes the air throttle assembly in the Continental/TCM Fuel-Injection System?
What distinguishes the air throttle assembly in the Continental/TCM Fuel-Injection System?
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What is the main purpose of the swirl well in the fuel-injection pump?
What is the main purpose of the swirl well in the fuel-injection pump?
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How is fuel delivered to the fuel manifold in the Continental/TCM system?
How is fuel delivered to the fuel manifold in the Continental/TCM system?
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What material is the Fuel Control Assembly body made from for optimal performance?
What material is the Fuel Control Assembly body made from for optimal performance?
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What happens to fuel pressure as engine speed changes in the Continental/TCM system?
What happens to fuel pressure as engine speed changes in the Continental/TCM system?
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What function do check valves serve in the fuel-injection system?
What function do check valves serve in the fuel-injection system?
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What configuration does the fuel injector pump typically feature in the Continental/TCM Fuel-Injection System?
What configuration does the fuel injector pump typically feature in the Continental/TCM Fuel-Injection System?
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Why is vapor return important in the fuel-injection system?
Why is vapor return important in the fuel-injection system?
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What is a unique feature of the air throttle mounted at the manifold inlet?
What is a unique feature of the air throttle mounted at the manifold inlet?
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What is the primary function of the drilled radial holes in the fuel discharge nozzle?
What is the primary function of the drilled radial holes in the fuel discharge nozzle?
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How are the nozzles for a given engine identified?
How are the nozzles for a given engine identified?
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What is the purpose of the shield that is press-fitted on the nozzle body?
What is the purpose of the shield that is press-fitted on the nozzle body?
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In what part of the fuel discharge nozzle does the air/fuel mixing occur before the spray exits?
In what part of the fuel discharge nozzle does the air/fuel mixing occur before the spray exits?
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What feature of the nozzle contributes to effective filtration of foreign materials?
What feature of the nozzle contributes to effective filtration of foreign materials?
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Which of the following statements about the removable orifice in the upper bore is true?
Which of the following statements about the removable orifice in the upper bore is true?
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What is the significance of using nozzles from the same range for a particular engine?
What is the significance of using nozzles from the same range for a particular engine?
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What role does the filter screen play in the operation of the fuel discharge nozzle?
What role does the filter screen play in the operation of the fuel discharge nozzle?
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Study Notes
Reciprocating Engine
- A type of engine where a piston moves back and forth in a cylinder, creating mechanical energy.
Fuel-Injection Systems
- Fuel-Injection Systems have many advantages over a conventional carburetor system
- Advantages include reduced danger of induction system icing, improved acceleration and fuel distribution, and better fuel economy.
Bendix/Precision Fuel-Injection System
- Consists of an injector, a flow divider, and fuel discharge nozzles.
- It's a continuous-flow system that measures engine air consumption, using airflow forces to control fuel flow to the engine.
- Fuel distribution to individual cylinders is achieved using a fuel flow divider and air bleed nozzles.
- The system has an airflow section for measuring engine airflow, an impact pressure, and a venturi throat pressure.
Fuel Metering Section
- Attached to the air metering section, containing an inlet fuel strainer, a manual mixture control valve, and an idle valve.
- The Idle valve is linked to the throttle valve via an external adjustable link and contains a main metering jet and a power enrichment jet in some models.
Flow Divider
- Meters and controls fuel flow to the flow divider.
- The volume of airflow determines the rate of fuel flow, and a pressure differential is referred to as the "air metering force" and is accomplished by channeling the impact and venturi suction pressures to opposite sides of a diaphragm.
Fuel Discharge Nozzles
- An air-bleed configuration with one nozzle for each cylinder located in the cylinder head.
- These nozzles are located at intake ports.
- Fuel is introduced into the intake valve chambers before entering the intake valves.
Continental/TCM Fuel-Injection System
- This system injects fuel into the intake valve port, into the cylinder head.
- The system is comprised of a fuel injector pump, a fuel control unit, a fuel manifold, and fuel discharge nozzles
Fuel/Air Control Unit
- Controls engine air intake and sets metered fuel pressure, for proper fuel/air ratio.
- Located at the manifold inlet, with a butterfly valve, positioned by in the aircraft's throttle control.
- This controls intake airflow into the engine.
- It includes an air throttle assembly with an aluminum casting that holds a shaft and butterfly valve assembly.
Fuel Manifold Valve
- Contains a diaphragm chamber, a spring-loaded diaphragm, and a valve in the central bore.
- Fuel is delivered through outlet ports to individual nozzles.
- The valve is operated by pressure, and a fine screen is installed to prevent contamination.
- The valve includes a ball valve that has a direct connection to the fuel manifold valve, which divides fuel flow to individual cylinders.
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Description
Test your knowledge on the critical components of fuel injection systems, focusing on the flow divider's role and operation. This quiz covers the function of the flow divider, conditions for fuel flow, and how pressure impacts fuel delivery. Perfect for students studying automotive technology or related fields.
