# Engine definition. Dimensional keys state their units.
schema_version = 2
id = "rb26"
name = "RB26-inspired / 2.6 inline six NA"
category = "Inline six"
description = "Unequal primaries / small junctions / staged collectors / EFI"
order = 24
cycle = "four_stroke"

[simulation]
cells_per_meter = 20.0

[engine]
bank_angle_deg = 60.0
cylinders = 6
initial_rpm = 1400.0
initialize_phased_charge = true
layout = "inline"
maximum_load_torque_nm = 30.0
minimum_substeps = 1
phase_degrees = [0.0, 240.0, 480.0, 120.0, 600.0, 360.0]
pipe_damping = 0.0
starter_torque_nm = 64.21635
throttle_diameter_mm = 65.0
topology = "staged"

[cylinder]
afr = 14.7
ambient_temperature_k = 300.0
bore_mm = 86.0
burn_duration_deg = 60.0
burn_start_deg = 5.0
compression = 10.0
energy_variation = 0.05
exhaust_valve_count = 1
exhaust_valve_diameter_mm = 27.52
fuel_lhv_j_per_kg = 4.4e+07
heat_transfer = 100.0
intake_valve_count = 1
intake_valve_diameter_mm = 32.68
misfire_probability = 0.0
rod_mm = 132.66
stroke_mm = 73.7
wall_area = 0.02
wiebe_a = 5.0
wiebe_m = 2.0

[crankshaft]
friction_constant_nm = 10.27462
friction_quadratic_nm_s2 = 0.0
friction_viscous_nm_s = 0.01027462
inertia_kg_m2 = 0.3082384

[ecu]
idle_base_opening = 0.05
idle_control = "feedback"
idle_ki = 4e-05
idle_kp = 0.0001
idle_max_opening = 0.25
idle_minimum_advance_deg = -5.0
idle_rpm = 1000.0
idle_spark_gain = 0.02
ignition_map = [[0.0, 10.0], [15000.0, 40.0]]
overrun_cut_rpm = 3500.0
overrun_fuel_cut_enabled = true
overrun_ignition_cut_enabled = false
overrun_resume_rpm = 2400.0
power_afr = 12.8
rev_limit_enabled = true
rev_limit_fuel_cut_enabled = true
rev_limit_rpm = 7000.0
rev_resume_rpm = 6750.0
stoichiometric_afr = 14.7
throttle_closing_rate = 0.0
throttle_closing_time_constant_s = 0.0
throttle_rate = 1000.0
throttle_time_constant_s = 0.001

[vehicle]
air_density = 1.225
clutch_capacity = 565.1038
clutch_engagement_rate = 8.0
drag_coefficient = 0.7
final_drive_ratio = 2.7
frontal_area = 0.65
gear_ratios = [4.1, 2.7, 2.0, 1.55, 1.25, 0.98]
gravity = 9.80665
mass_kg = 1400.0
primary_reduction = 1.8
rolling_resistance = 0.015
rotational_inertia_kg_m2 = 1.2
wheel_radius_mm = 320.0

[fuel]
system = "injection"

[junctions]
h_pipe = true

[[pipes]]
id = "intake"
diameter_mm = 75.0

[[pipes]]
id = "runners"
count = 6
diameter_mm = 35.0

[[pipes]]
id = "primary_1"
diameter_mm = 38.0

[[pipes]]
id = "primary_2"
diameter_mm = 38.0

[[pipes]]
id = "primary_3"
diameter_mm = 38.0

[[pipes]]
id = "primary_4"
diameter_mm = 38.0

[[pipes]]
id = "primary_5"
diameter_mm = 38.0

[[pipes]]
id = "primary_6"
diameter_mm = 38.0

[[pipes]]
id = "tailpipe_13"
diameter_mm = 60.0

[[pipes]]
id = "secondary_14"
diameter_mm = 48.0

[[pipes]]
id = "secondary_15"
diameter_mm = 48.0

[cam.intake]
points = [
  [0.000, 0.000000],
  [340.000, 0.000000],
  [345.000, 0.156314],
  [350.000, 0.590029],
  [355.000, 1.248307],
  [360.000, 2.078310],
  [365.000, 3.027200],
  [370.000, 4.042138],
  [375.000, 5.070285],
  [380.000, 6.058803],
  [385.000, 6.954854],
  [390.000, 7.705600],
  [395.000, 8.258202],
  [400.000, 8.559821],
  [402.500, 8.600000],
  [527.500, 8.600000],
  [532.500, 8.443686],
  [537.500, 8.009971],
  [542.500, 7.351693],
  [547.500, 6.521690],
  [552.500, 5.572800],
  [557.500, 4.557862],
  [562.500, 3.529715],
  [567.500, 2.541197],
  [572.500, 1.645146],
  [577.500, 0.894400],
  [582.500, 0.341798],
  [587.500, 0.040179],
  [590.000, 0.000000],
  [720.000, 0.000000]
]

[cam.exhaust]
points = [
  [0.000, 0.000000],
  [130.000, 0.000000],
  [135.000, 0.130350],
  [140.000, 0.493218],
  [145.000, 1.046327],
  [150.000, 1.747401],
  [155.000, 2.554165],
  [160.000, 3.424343],
  [165.000, 4.315658],
  [170.000, 5.185836],
  [175.000, 5.992600],
  [180.000, 6.693674],
  [185.000, 7.246783],
  [190.000, 7.609651],
  [195.000, 7.740001],
  [325.000, 7.740001],
  [330.000, 7.609651],
  [335.000, 7.246783],
  [340.000, 6.693674],
  [345.000, 5.992600],
  [350.000, 5.185836],
  [355.000, 4.315658],
  [360.000, 3.424343],
  [365.000, 2.554165],
  [370.000, 1.747401],
  [375.000, 1.046327],
  [380.000, 0.493218],
  [385.000, 0.130350],
  [390.000, 0.000000],
  [720.000, 0.000000]
]

[valves.intake]
mass_g = 35.0
spring_rate_n_per_mm = 38.0
damping_n_s_per_m = 24.0
seat_force_n = 75.0
maximum_lift_mm = 15.0
seat_restitution = 0.005
cam_restitution = 0.01
stop_restitution = 0.01

[valves.exhaust]
mass_g = 35.0
spring_rate_n_per_mm = 38.0
damping_n_s_per_m = 24.0
seat_force_n = 75.0
maximum_lift_mm = 15.0
seat_restitution = 0.005
cam_restitution = 0.01
stop_restitution = 0.01

[valve_sound]
mode_hz = 3600.0
effective_mass_g = 180.0
radiation_area_cm2 = 10.0
damping_ratio = 0.9

[[geometry.cylinders]]
origin_mm = [ -260, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ -156, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ -52, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 52, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 156, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 260, 0, 0 ]
tilt_deg = 0.0

# intake
[[geometry.pipes]]
index = 0
points_mm = [
  [ -512, 169.6989, -361.8 ],
  [ -312, 169.6989, -361.8 ]
]

# runners 1
[[geometry.pipes]]
index = 1
points_mm = [
  [ -260, 169.6989, -284.4 ],
  [ -260, 169.6989, -34.4 ]
]

# runners 2
[[geometry.pipes]]
index = 2
points_mm = [
  [ -156, 169.6989, -284.4 ],
  [ -156, 169.6989, -34.4 ]
]

# runners 3
[[geometry.pipes]]
index = 3
points_mm = [
  [ -52, 169.6989, -284.4 ],
  [ -52, 169.6989, -34.4 ]
]

# runners 4
[[geometry.pipes]]
index = 4
points_mm = [
  [ 52, 169.6989, -284.4 ],
  [ 52, 169.6989, -34.4 ]
]

# runners 5
[[geometry.pipes]]
index = 5
points_mm = [
  [ 156, 169.6989, -284.4 ],
  [ 156, 169.6989, -34.4 ]
]

# runners 6
[[geometry.pipes]]
index = 6
points_mm = [
  [ 260, 169.6989, -284.4 ],
  [ 260, 169.6989, -34.4 ]
]

# primary_1
[[geometry.pipes]]
index = 7
points_mm = [
  [ -260, 169.6989, 43 ],
  [ -258.9425, 166.7079, 55.9219 ],
  [ -255.954, 162.0061, 66.9219 ],
  [ -251.3103, 155.731, 76.1501 ],
  [ -245.2874, 148.0196, 83.7568 ],
  [ -238.161, 139.0093, 89.8919 ],
  [ -230.207, 128.8373, 94.7057 ],
  [ -221.7012, 117.6409, 98.3485 ],
  [ -212.9196, 105.5573, 100.9702 ],
  [ -204.138, 92.7238, 102.7211 ],
  [ -195.6323, 79.2776, 103.7514 ],
  [ -187.6783, 65.3559, 104.2112 ],
  [ -180.5519, 51.0961, 104.2507 ],
  [ -174.5289, 36.6354, 104.02 ],
  [ -169.8852, 22.111, 103.6693 ],
  [ -166.8968, 7.6602, 103.3488 ],
  [ -165.8393, -6.5798, 103.2085 ]
]

# primary_2
[[geometry.pipes]]
index = 8
points_mm = [
  [ -156, 169.6989, 43 ],
  [ -156, 166.8166, 54.605 ],
  [ -156, 162.0189, 64.6276 ],
  [ -156, 155.4836, 73.1827 ],
  [ -156, 147.389, 80.3855 ],
  [ -156, 137.9129, 86.3509 ],
  [ -156, 127.2335, 91.194 ],
  [ -156, 115.5287, 95.0298 ],
  [ -156, 102.9766, 97.9735 ],
  [ -156, 89.7552, 100.14 ],
  [ -156, 76.0426, 101.6444 ],
  [ -156, 62.0167, 102.6017 ],
  [ -156, 47.8557, 103.1269 ],
  [ -156, 33.7375, 103.3352 ],
  [ -156, 19.8401, 103.3415 ],
  [ -156, 6.3417, 103.261 ],
  [ -156, -6.5798, 103.2085 ]
]

# primary_3
[[geometry.pipes]]
index = 9
points_mm = [
  [ -52, 169.6989, 43 ],
  [ -53.0575, 166.7079, 55.9219 ],
  [ -56.046, 162.0061, 66.9219 ],
  [ -60.6896, 155.731, 76.1501 ],
  [ -66.7126, 148.0196, 83.7568 ],
  [ -73.839, 139.0093, 89.8919 ],
  [ -81.793, 128.8373, 94.7057 ],
  [ -90.2988, 117.6409, 98.3485 ],
  [ -99.0804, 105.5573, 100.9702 ],
  [ -107.8619, 92.7238, 102.7211 ],
  [ -116.3677, 79.2776, 103.7514 ],
  [ -124.3217, 65.3559, 104.2112 ],
  [ -131.4481, 51.0961, 104.2507 ],
  [ -137.4711, 36.6354, 104.02 ],
  [ -142.1148, 22.111, 103.6693 ],
  [ -145.1033, 7.6602, 103.3488 ],
  [ -146.1607, -6.5798, 103.2085 ]
]

# primary_4
[[geometry.pipes]]
index = 10
points_mm = [
  [ 52, 169.6989, 43 ],
  [ 53.0575, 166.6343, 57.2699 ],
  [ 56.046, 161.9975, 70.224 ],
  [ 60.6896, 155.8982, 81.9166 ],
  [ 66.7126, 148.446, 92.4023 ],
  [ 73.839, 139.7507, 101.7358 ],
  [ 81.793, 129.9218, 109.9715 ],
  [ 90.2988, 119.0691, 117.164 ],
  [ 99.0804, 107.3023, 123.3678 ],
  [ 107.8619, 94.731, 128.6374 ],
  [ 116.3677, 81.465, 133.0275 ],
  [ 124.3217, 67.6138, 136.5926 ],
  [ 131.4481, 53.2872, 139.3871 ],
  [ 137.4711, 38.5949, 141.4657 ],
  [ 142.1148, 23.6465, 142.8829 ],
  [ 145.1033, 8.5517, 143.6932 ],
  [ 146.1607, -6.5798, 143.9512 ]
]

# primary_5
[[geometry.pipes]]
index = 11
points_mm = [
  [ 156, 169.6989, 43 ],
  [ 156, 166.7349, 56.0518 ],
  [ 156, 162.0093, 68.1017 ],
  [ 156, 155.6694, 79.1718 ],
  [ 156, 147.8627, 89.284 ],
  [ 156, 138.7365, 98.4604 ],
  [ 156, 128.4383, 106.7232 ],
  [ 156, 117.1154, 114.0943 ],
  [ 156, 104.9152, 120.5959 ],
  [ 156, 91.9852, 126.25 ],
  [ 156, 78.4727, 131.0786 ],
  [ 156, 64.5251, 135.1038 ],
  [ 156, 50.2899, 138.3477 ],
  [ 156, 35.9144, 140.8323 ],
  [ 156, 21.546, 142.5797 ],
  [ 156, 7.3321, 143.612 ],
  [ 156, -6.5798, 143.9512 ]
]

# primary_6
[[geometry.pipes]]
index = 12
points_mm = [
  [ 260, 169.6989, 43 ],
  [ 258.9425, 166.6343, 57.2699 ],
  [ 255.954, 161.9975, 70.224 ],
  [ 251.3103, 155.8982, 81.9166 ],
  [ 245.2874, 148.446, 92.4023 ],
  [ 238.161, 139.7507, 101.7358 ],
  [ 230.207, 129.9218, 109.9715 ],
  [ 221.7012, 119.0691, 117.164 ],
  [ 212.9196, 107.3023, 123.3678 ],
  [ 204.138, 94.731, 128.6374 ],
  [ 195.6323, 81.465, 133.0275 ],
  [ 187.6783, 67.6138, 136.5926 ],
  [ 180.5519, 53.2872, 139.3871 ],
  [ 174.5289, 38.5949, 141.4657 ],
  [ 169.8852, 23.6465, 142.8829 ],
  [ 166.8968, 8.5517, 143.6932 ],
  [ 165.8393, -6.5798, 143.9512 ]
]

# tailpipe_13
[[geometry.pipes]]
index = 13
points_mm = [
  [ 218.4202, -70, 169.5 ],
  [ 1718.4201, -70, 169.5 ]
]

# secondary_14
[[geometry.pipes]]
index = 14
points_mm = [
  [ -137.5798, -27.3284, 112.6045 ],
  [ -115.9354, -27.7815, 113.2086 ],
  [ -94.9697, -29.0619, 114.9159 ],
  [ -74.5859, -31.0515, 117.5686 ],
  [ -54.6869, -33.632, 121.0094 ],
  [ -35.1758, -36.6853, 125.0805 ],
  [ -15.9556, -40.0932, 129.6243 ],
  [ 3.0707, -43.7375, 134.4834 ],
  [ 22, -47.5, 139.5 ],
  [ 40.9293, -51.2625, 144.5166 ],
  [ 59.9556, -54.9068, 149.3757 ],
  [ 79.1758, -58.3147, 153.9195 ],
  [ 98.6869, -61.368, 157.9906 ],
  [ 118.5859, -63.9485, 161.4314 ],
  [ 138.9697, -65.9381, 164.0842 ],
  [ 159.9354, -67.2185, 165.7914 ],
  [ 181.5798, -67.6716, 166.3955 ]
]

# secondary_15
[[geometry.pipes]]
index = 15
points_mm = [
  [ 174.0108, -43.4202, 160.6401 ],
  [ 174.1004, -44.1614, 160.6706 ],
  [ 174.3536, -44.8101, 160.7569 ],
  [ 174.7471, -45.3796, 160.8911 ],
  [ 175.2574, -45.8829, 161.065 ],
  [ 175.8613, -46.3335, 161.2709 ],
  [ 176.5352, -46.7443, 161.5006 ],
  [ 177.2559, -47.1288, 161.7463 ],
  [ 178, -47.5, 162 ],
  [ 178.7441, -47.8712, 162.2536 ],
  [ 179.4648, -48.2557, 162.4994 ],
  [ 180.1387, -48.6665, 162.7291 ],
  [ 180.7426, -49.1171, 162.935 ],
  [ 181.2529, -49.6204, 163.1089 ],
  [ 181.6464, -50.1899, 163.2431 ],
  [ 181.8996, -50.8386, 163.3294 ],
  [ 181.9892, -51.5798, 163.3599 ]
]

[[geometry.volumes]]
id = "intake_plenum"
center_mm = [ 0, 169.6989, -361.8 ]
size_mm = [ 624, 62.1149, 154.8 ]

[[geometry.volumes]]
id = "junction_0"
center_mm = [ -156, -25, 109.5 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]

[[geometry.volumes]]
id = "junction_1"
center_mm = [ 156, -25, 154.5 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]

[[geometry.volumes]]
id = "junction_2"
center_mm = [ 200, -70, 169.5 ]
size_mm = [ 36.8403, 36.8403, 36.8403 ]