What causes the metering valve to close after BDC?
A pre-determined time after BDC, a control signal is applied to the metering valve causing it to close so that continued movement of the plunger causes fuel pressurisation.
How to reset throttle body calibration [ step by step guide ]?
Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds.
What causes engine detonation at lower RPM range?
For example, if the engine spends more time under load at a lower engine speed, the engine may encounter detonation, whereas it would not detonate at the same load higher in the RPM range. A racing gasoline with a higher octane may be needed to combat the potential for detonation operating in the lower RPM range.
What makes a throttling valve a fluid control device?
THROTTLING VALVES Valves that are utilized as fluid control devices are typically “throttling valves”. Such valves experience internal velocity and internal pressure gradients (both positive and negative) that conclude with a permanent pressure loss (∆P) from the inlet pipe-to-outlet pipe connections.
What is the internal velocity of a throttling valve?
Such valves experience internal velocity and internal pressure gradients (both positive and negative) that conclude with a permanent pressure loss (∆P) from the inlet pipe-to-outlet pipe connections. Throttling valve trim (plug-seat) experiences relatively high internal velocities nearly 100% of operating time.
Why is a nonlinear controller needed for a throttle valve?
Due to the existence of multiple nonsmooth nonlinearities, the controller design to the electronic throttle valve becomes difficult task. These nonlinearities including stick–slip friction, backlash, and a discontinuous nonlinear spring involved in the system.
Which is better a globe or eccentric Globe throttling valve?
As a general rule, globe and eccentric plug (rotary globe) styles tend to make “better” throttling control valves. -6- Cond. 1 Cond. 2 Throttling Valve Upstream Downstream LIQUID (Non-Compressible) GAS–VAPOR (Compressible) ∆P = P1- P2 LIQUIDLIQUID FLUID STATES Fluid flow is classified into two basic fluid states at the inlet.