What does exhaust throttle valve do?
At least one exhaust throttle valve is located downstream of the engine on the fluid passageway. When the exhaust throttle valve is actuated, the valve obstructs the flow of exhaust gas and increases the temperature of the exhaust gas. The heated exhaust gas causes regeneration at the diesel particulate filter.
Are throttling valves used?
The globe valve is primarily used as a throttling valve.
What is the main function of throttle valve Mcq?
5. What is the main function of a throttle valve? Clarification: The purpose of a throttle valve is to control the quantity of the air-fuel mixture and it is attached to the accelerator pedal.
How does a throttling device work?
A throttling device is the generic name of any device or process that simply dissipates pressure energy by irreversibly converting it into thermal energy. Unlike nozzles and diffusers, throttling devices provide no form of useful energy recovery.
What happens in throttling process?
Throttling is a process where a high-pressure fluid is converted into low-pressure by using a throttle valve. In a throttling process, the enthalpy remains constant and the work done is zero.
Does throttling increase pressure?
The throttling effect is to reduce the inlet pressure by a constant enthalpy process (represented by horizontal line AB). The result is a loss in entropy and also a slight fall in temperature with some reduction in the available heat drop. This accounts for a small loss in efficiency.
Which of the following statements are correct for the throttle valve?
Right Answer is: A When a fluid flows through a constricted passage, like a partially open valve, an orifice, or a porous plug, there is an appreciable drop in pressure and the flow is said to be throttled. Throttling is done in an insulated pipe with a partially open valve.
What is the function of the flow control valve Mcq?
What is the function of the control valve? Explanation: The control valve is used to control different parameters of fluid, by which the required specific task is completed in a proper way as desired.
What is throttling process with example?
Throttling Process Thermodynamics – Thermodynamics An example of a throttling process is an ideal gas flowing through a valve in mid position. From experience we can observe that: Pin > Pout, velin < velout (where P = pressure and vel = velocity). These observations confirm the theory that hin = hout.
Does throttling decrease pressure?
A throttling valve restricts the cross sectional area through which the fluid flows increasing supply or upstream pressure and reducing flow resulting in a decrease in pressure and flow on the unrestricted or down stream branch of the system.
How does a throttling valve reduce pressure?
What would cause throttle body to go bad?
Possible causes of a malfunction One of the main causes of a malfunctioning throttle body is internal contamination. Due to the contamination accumulated in the throttle body, the throttle valve can no longer move properly, causing problems with the control of the air supply.
Which of the following is the use of the throttling process?
Throttling process is a thermodynamic process which is used to reduce or decrease the pressure of a fluid. In this process a liquid having high pressure is converted into low pressure fluid.
Is throttling process is steady flow?
Such type of flow of fluid where significant pressure reduction of fluid is secured by introducing a restriction in to its passage will be termed as throttled flow. Devices used for providing the restriction in the flow of fluid and simultaneously causing significant pressure drops will be termed as throttling devices.
Where is the throttle valve located on a diesel engine?
At least one exhaust throttle valve is located downstream of the engine on the fluid passageway. When the exhaust throttle valve is actuated, the valve obstructs the flow of exhaust gas and increases the temperature of the exhaust gas. The heated exhaust gas causes regeneration at the diesel particulate filter.
How does a 30 a 30 D throttle valve work?
When the exhaust throttle valve ( 30 A- 30 D) is actuated, the valve obstructs the flow of exhaust gas (F) and increases the temperature of the exhaust gas. The heated exhaust gas (F) causes regeneration at the diesel particulate filter ( 24 ).
Can the exhaust aftertreatment system 10 include two throttle valves?
Referring now to FIG. 3, it is also possible that the exhaust aftertreatment system 10can include two exhaust throttle valves 30C, 30D having two actuators 34C, 34D.
How does a needle type throttle valve work?
The needle type of throttle valve regulates the fluid flow rate by adjusting the size of throttle area through the axial movement of needle throttle poppet. Simple structure, but longer throttle gap with small hydraulic force radius, therefore, the needle throttle valve is easily be blocked and influenced by hydraulic oil temperature.