engine_math.h

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/**
 * @file    engine_math.h
 *
 * @date Jul 13, 2013
 * @author Andrey Belomutskiy, (c) 2012-2020
 */
 
#pragma once
 
#include "rusefi_enums.h"
 
void setAlgorithm(engine_load_mode_e algo);
 
void setFlatInjectorLag(float value);
 
/**
 * @return time needed to rotate crankshaft by one degree, in milliseconds.
 * @deprecated use at least Us, maybe even Nt
 */
#define getOneDegreeTimeMs(rpm) (1000.0f * 60 / 360 / (rpm))
 
/**
 * @return float, time needed to rotate crankshaft by one degree, in microseconds.
 * See also engine->rpmCalculator.oneDegreeUs
 */
#define getOneDegreeTimeUs(rpm) (1000000.0f * 60 / 360 / (rpm))
 
floatms_t getCrankshaftRevolutionTimeMs(float rpm);
floatms_t getEngineCycleDuration(float rpm);
 
float getFuelingLoad();
float getIgnitionLoad();
 
ignition_mode_e getCurrentIgnitionMode();
 
void setTimingRpmBin(float from, float to);
 
void setSingleCoilDwell();
 
// we combine trigger-defined triggerShape.tdcPosition with user-defined engineConfiguration->globalTriggerAngleOffset
// expectation is that for well-known triggers engineConfiguration->globalTriggerAngleOffset would usually be zero
// while for toothed wheels user would have to provide a value
// If camSyncOnSecondCrankRevolution is active, 360° are added
#define tdcPosition() \
        (getTriggerCentral()->triggerShape.tdcPosition \
            + ( engineConfiguration->camSyncOnSecondCrankRevolution ? engineConfiguration->globalTriggerAngleOffset + 360 : engineConfiguration->globalTriggerAngleOffset ))
 
/** Gets phase offset for a particular cylinder's ID and number
 * For example on 4 cylinder engine with firing order 1-3-4-2, this
 * returns 0-180-360-540 for index 0-1-2-3
 * Cylinder number is used for per-cylinder adjustment, if you have
 * an odd-fire engine (v-twin, V10, some v6, etc)
 */
angle_t getPerCylinderFiringOrderOffset(uint8_t cylinderIndex, uint8_t cylinderNumber);
 
// Table blending helpers
struct BlendResult {
    // Input blend parameter (lookup to bias table)
    float BlendParameter;
 
    // Bias in percent (0-100%)
    float Bias;
 
    // Result value (bias * table value)
    float Value;
 
    // Y axis value used for lookup (to show the dot correctly in TunerStudio)
    float TableYAxis;
};
 
BlendResult calculateBlend(blend_table_s& cfg, float rpm, float load);