#include <high_pressure_fuel_pump.h>

Collaboration diagram for HpfpLobe:

Public Member Functions
angle_t	findNextLobe ()
	Calculate the angle (after crank TDC) for the top of the next lobe.

Data Fields
uint8_t	m_lobe_index = 0
	0-based index of the last lobe returned

Detailed Description

Definition at line 27 of file high_pressure_fuel_pump.h.

Member Function Documentation

◆ findNextLobe()

angle_t HpfpLobe::findNextLobe ( )

Calculate the angle (after crank TDC) for the top of the next lobe.

Definition at line 41 of file high_pressure_fuel_pump.cpp.

                               {
    // TODO: Ideally we figure out where we are in the engine cycle and pick the next lobe
    // based on that.  At least we should do that when cranking, so we can start that much
    // sooner.
 
    auto lobes = engineConfiguration->hpfpCamLobes;
    if (!lobes) {
        return 0;
    }
 
    // Which lobe are we on?
    int next_index = m_lobe_index + 1;
    // Note, this will be insufficient if the # of cam lobes is
    // dynamically changed rapidly by more than 2x, but it will
    // correct itself rather quickly.
    if (next_index >= lobes) {
        next_index -= lobes;
    }
    m_lobe_index = next_index;
 
    // Calculate impact of VVT
    angle_t vvt = 0;
    if (engineConfiguration->hpfpCam != HPFP_CAM_NONE) {
        // pump operates in cam-angle domain which is different speed from crank-angle domain on 4 stroke engines
        int mult = (int)getEngineCycle(getEngineRotationState()->getOperationMode()) / 360;
        int camIndex = engineConfiguration->hpfpCam - 1;
        // TODO: Is the sign correct here?  + means ATDC?
        vvt = engine->triggerCentral.getVVTPosition(
            BANK_BY_INDEX(camIndex),
            CAM_BY_INDEX(camIndex)) / mult;
    }
 
  // heh, looks like we assume 4 stroke here?
    return engineConfiguration->hpfpPeakPos + vvt + next_index * 720 / lobes;
}