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AP_EFI: added fuel usage integration for Lutan EFI

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allows for EFI_COEF1 and EFI_COEF2 to be set to get fuel consumption
on GCS
This commit is contained in:
Andrew Tridgell 2022-05-14 20:12:23 +10:00 committed by Randy Mackay
parent 40a5c628c9
commit ee41132483
1 changed files with 13 additions and 1 deletions
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14
libraries/AP_EFI/AP_EFI_Serial_Lutan.cpp
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@ -21,6 +21,9 @@
#if HAL_EFI_ENABLED
#include <AP_SerialManager/AP_SerialManager.h>
// RPM Threshold for fuel consumption estimator
#define RPM_THRESHOLD 100
extern const AP_HAL::HAL &hal;
AP_EFI_Serial_Lutan::AP_EFI_Serial_Lutan(AP_EFI &_frontend):
@ -60,7 +63,6 @@ void AP_EFI_Serial_Lutan::update()
const uint32_t crc2 = ~crc_crc32(~0U, &pkt[2], length);
if (crc == crc2) {
// valid data
internal_state.last_updated_ms = now;
internal_state.spark_dwell_time_ms = int16_t(be16toh(data.dwell))*0.1;
internal_state.cylinder_status[0].injection_time_ms = be16toh(data.pulseWidth1)*0.00666;
internal_state.engine_speed_rpm = be16toh(data.rpm);
@ -71,6 +73,16 @@ void AP_EFI_Serial_Lutan::update()
// CHT is in coolant field
internal_state.cylinder_status[0].cylinder_head_temperature = internal_state.coolant_temperature;
internal_state.throttle_position_percent = int16_t(be16toh(data.tps))*0.1;
// integrate fuel consumption
if (internal_state.engine_speed_rpm > RPM_THRESHOLD) {
const float duty_cycle = (internal_state.cylinder_status[0].injection_time_ms * internal_state.engine_speed_rpm)/600.0f;
internal_state.fuel_consumption_rate_cm3pm = duty_cycle*get_coef1() - get_coef2();
internal_state.estimated_consumed_fuel_volume_cm3 += internal_state.fuel_consumption_rate_cm3pm * (now - internal_state.last_updated_ms)/60000.0f;
} else {
internal_state.fuel_consumption_rate_cm3pm = 0;
}
internal_state.last_updated_ms = now;
copy_to_frontend();
}
pkt_nbytes = 0;