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Fuel consumption (liters/sec) = RPM(in min) * injector open time (in ms) * injector flow(in min)

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+/**
+ * @file    fuel_consumption_calculator.cpp
+ * @brief   fuel consumption calculator
+ *
+ * @date May 3, 2014
+ * @author Dmitry Sidin
+ * @author Andrey Belomutskiy (c) 2012-2014
+ */
+
+#include "fuel_consumption_calculator.h"
+#include "rpm_calculator.h"
+#include "main.h"
+#include "ec2.h"
+
+extern engine_configuration_s *engineConfiguration;
+static FuelConsumption ConsCalc ;
+
+void FuelConsumption::refreshConsumption(float fuel) {
+
+	fuelConsumption = fuelConsumption + fuel / 60000 * engineConfiguration->injectorFlow;
+	// cm3
+
+}
+
+float FuelConsumption::getConsumptionCurrLiterPerHour(void) {
+
+	nowUs = getTimeNowUs();
+
+	diff = nowUs - lastFuelEventTimeUs;
+
+	lastFuelEventTimeUs = nowUs;
+
+	// 1000000 - Us per second
+	// 1000 cm3 per liter
+	// 3600 seconds per hour
+
+	float consumption = fuelConsumption * 3600 / ( diff / 1000000 ) / 1000 ;
+	fuelConsumption = 0 ;
+	return consumption;
+}
+
+float FuelConsumption::getFuelTrip(void) {
+	return fuelConsumption * 1000;
+}
+
+void refreshConsumption(float fuel) {
+  ConsCalc.refreshConsumption(fuel);
+}
+
+float getConsumptionCurrLiterPerHour(void) {
+	return ConsCalc.getConsumptionCurrLiterPerHour();
+}
+
+float getFuelTrip(void) {
+	return ConsCalc.getFuelTrip();
+}