trigger_renix.cpp

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/**
 * @file    trigger_renix.cpp
 *
 * https://en.wikipedia.org/wiki/Renix
 * Has something to do with AMC/Jeep
 *
 * @date Apr 18, 2020
 * @author Andrey Belomutskiy, (c) 2012-2020
 */
 
#include "pch.h"
 
#include "trigger_renix.h"
 
static void commonRenix(TriggerWaveform *s) {
    // 44-2-2 is symmetrical so we only need to define one half
    int count = 22;
    float tooth = s->getCycleDuration() / count; // hint: tooth = 8.181818 degrees
 
    float currentAngle = 0;
    for (int i = 0;i < 20;i++) {
        s->addEventAngle(currentAngle + tooth / 2, TriggerValue::RISE);
        s->addEventAngle(currentAngle + tooth, TriggerValue::FALL);
        currentAngle += tooth;
    }
 
    s->addEventAngle(currentAngle + tooth, TriggerValue::RISE);
 
    // float math error accumulates at this point so we have to spell out 180
    s->addEventAngle(s->getCycleDuration(), TriggerValue::FALL);
}
 
// TT_RENIX_44_2_2
void initializeRenix44_2_2(TriggerWaveform *s) {
    s->initialize(FOUR_STROKE_SYMMETRICAL_CRANK_SENSOR, SyncEdge::RiseOnly);
    commonRenix(s);
}
 
// TT_RENIX_66_2_2_2
void initializeRenix66_2_2(TriggerWaveform *s) {
    s->initialize(FOUR_STROKE_THREE_TIMES_CRANK_SENSOR, SyncEdge::RiseOnly);
    commonRenix(s);
}
 
// basically like the "normal" renix 22-2 pattern -> 66-2-2-2, except without the extra random tooth there in the middle.
// this is copied from vq35 36-2-2-2 pattern.
void JeepRenix66_2_2(TriggerWaveform* s, size_t halfCylinderCount, size_t totalWheel, size_t missing) {
 
    auto toothAngle = 360.0f / totalWheel;
 
    auto patternTeeth = totalWheel / halfCylinderCount;
    auto toothCount = patternTeeth - missing;
 
    float currentAngle = missing * toothAngle;
    for (size_t i = 0; i < toothCount; i++) {
        currentAngle += toothAngle;
        s->addEventAngle(currentAngle - (toothAngle/2), TriggerValue::RISE);
        if (i==toothCount-1) { // last event at 120
            s->addEventAngle( s->getCycleDuration(), TriggerValue::FALL);
        } else {
            s->addEventAngle(currentAngle, TriggerValue::FALL);
        }
    }
}
 
// TT_JEEPRENIX_66_2_2_2
void initializeJeepRenix66_2_2(TriggerWaveform *s) {
    s->initialize(FOUR_STROKE_THREE_TIMES_CRANK_SENSOR, SyncEdge::RiseOnly);
 
    // 6 cylinder = 66 tooth wheel, missing 2 teeth in 3 spots
    JeepRenix66_2_2(s, 3, 66, 2);
    s->setTriggerSynchronizationGap3(/*gapIndex*/0, 0.2, 0.5);
    s->setTriggerSynchronizationGap3(/*gapIndex*/1, 2, 4);
    s->setTriggerSynchronizationGap3(/*gapIndex*/2, 0.6, 1.4);
}