# Engine definition. Dimensional keys state their units.
schema_version = 2
id = "saab-straight"
name = "Saab B205 / straight-through"
category = "Inline four / Saab"
description = "6 L resonator and 18 L straight-through rear muffler"
order = 3
cycle = "four_stroke"

[simulation]
cells_per_meter = 40.0

[engine]
bank_angle_deg = 56.0
cylinders = 4
initial_rpm = 1200.0
initialize_phased_charge = true
layout = "inline"
maximum_load_torque_nm = 200.0
minimum_substeps = 2
phase_degrees = [0.0, 180.0, 540.0, 360.0]
pipe_damping = 0.0
starter_torque_nm = 65.0
throttle_diameter_mm = 52.0
topology = "collector"

[cylinder]
afr = 14.7
ambient_temperature_k = 300.0
bore_mm = 90.0
burn_duration_deg = 60.0
burn_start_deg = 5.0
compression = 8.8
energy_variation = 0.05
exhaust_valve_count = 2
exhaust_valve_diameter_mm = 28.0
fuel_lhv_j_per_kg = 4.4e+07
heat_transfer = 100.0
intake_valve_count = 2
intake_valve_diameter_mm = 32.0
misfire_probability = 0.0
rod_mm = 153.0
stroke_mm = 78.0
wall_area = 0.02
wiebe_a = 5.0
wiebe_m = 2.0

[crankshaft]
friction_constant_nm = 12.0
friction_quadratic_nm_s2 = 0.0
friction_viscous_nm_s = 0.012
inertia_kg_m2 = 0.18

[ecu]
idle_base_opening = 0.08
idle_control = "feedback"
idle_ki = 4e-05
idle_kp = 0.0001
idle_max_opening = 0.25
idle_minimum_advance_deg = -10.0
idle_rpm = 850.0
idle_spark_gain = 0.025
ignition_map = [[0.0, 10.0], [15000.0, 40.0]]
overrun_cut_rpm = 2000.0
overrun_fuel_cut_enabled = true
overrun_ignition_cut_enabled = false
overrun_resume_rpm = 1300.0
power_afr = 12.8
rev_limit_enabled = true
rev_limit_fuel_cut_enabled = true
rev_limit_rpm = 6500.0
rev_resume_rpm = 6250.0
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 = 300.0
clutch_engagement_rate = 8.0
drag_coefficient = 0.32
final_drive_ratio = 4.05
frontal_area = 2.2
gear_ratios = [3.382716, 1.758025, 1.177778, 0.8938271, 0.6592593]
gravity = 9.80665
mass_kg = 1675.0
primary_reduction = 1.0
rolling_resistance = 0.015
rotational_inertia_kg_m2 = 3.6
wheel_radius_mm = 317.0

[fuel]
system = "injection"

[silencers]
cell_length_mm = 35.0
connecting_length_mm = 800.0
diameter_mm = 60.0
enabled = true
inlet_length_mm = 1400.0
outlet_length_mm = 350.0

[silencers.resonator]
chambers = 1
core_diameter_mm = 60.0
length_mm = 400.0
loss_coefficient = 0.1
passage_diameter_mm = 60.0
resistance = 2.0
type = "straight_through"
diameter_mm = 138.1976604

[silencers.muffler]
chambers = 1
core_diameter_mm = 60.0
length_mm = 650.0
loss_coefficient = 0.35
passage_diameter_mm = 60.0
resistance = 4.0
type = "straight_through"
diameter_mm = 187.7736449

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

[[pipes]]
id = "runners"
count = 4
diameter_mm = 32.0

[[pipes]]
id = "primaries"
count = 4
diameter_mm = 34.0

[[pipes]]
id = "tailpipe"
profile = "silenced"

[cam.intake]
points = [
  [0.000, 0.000000],
  [340.000, 0.000000],
  [345.000, 0.154496],
  [350.000, 0.583168],
  [355.000, 1.233792],
  [360.000, 2.054144],
  [365.000, 2.992000],
  [370.000, 3.995136],
  [375.000, 5.011328],
  [380.000, 5.988352],
  [385.000, 6.873984],
  [390.000, 7.616000],
  [395.000, 8.162176],
  [400.000, 8.460288],
  [402.500, 8.500000],
  [527.500, 8.500000],
  [532.500, 8.345504],
  [537.500, 7.916832],
  [542.500, 7.266208],
  [547.500, 6.445856],
  [552.500, 5.508000],
  [557.500, 4.504864],
  [562.500, 3.488672],
  [567.500, 2.511648],
  [572.500, 1.626016],
  [577.500, 0.884000],
  [582.500, 0.337824],
  [587.500, 0.039712],
  [590.000, 0.000000],
  [720.000, 0.000000]
]

[cam.exhaust]
points = [
  [0.000, 0.000000],
  [130.000, 0.000000],
  [135.000, 0.134729],
  [140.000, 0.509786],
  [145.000, 1.081475],
  [150.000, 1.806099],
  [155.000, 2.639964],
  [160.000, 3.539372],
  [165.000, 4.460628],
  [170.000, 5.360036],
  [175.000, 6.193901],
  [180.000, 6.918525],
  [185.000, 7.490214],
  [190.000, 7.865271],
  [195.000, 8.000000],
  [325.000, 8.000000],
  [330.000, 7.865271],
  [335.000, 7.490214],
  [340.000, 6.918525],
  [345.000, 6.193901],
  [350.000, 5.360036],
  [355.000, 4.460628],
  [360.000, 3.539372],
  [365.000, 2.639964],
  [370.000, 1.806099],
  [375.000, 1.081475],
  [380.000, 0.509786],
  [385.000, 0.134729],
  [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 = [ -162, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ -54, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 54, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 162, 0, 0 ]
tilt_deg = 0.0

# intake
[[geometry.pipes]]
index = 0
points_mm = [
  [ -366, 194, -367 ],
  [ -216, 194, -367 ]
]

# runners 1
[[geometry.pipes]]
index = 1
points_mm = [
  [ -162, 194, -286 ],
  [ -162, 194, -36 ]
]

# runners 2
[[geometry.pipes]]
index = 2
points_mm = [
  [ -54, 194, -286 ],
  [ -54, 194, -36 ]
]

# runners 3
[[geometry.pipes]]
index = 3
points_mm = [
  [ 54, 194, -286 ],
  [ 54, 194, -36 ]
]

# runners 4
[[geometry.pipes]]
index = 4
points_mm = [
  [ 162, 194, -286 ],
  [ 162, 194, -36 ]
]

# primaries 1
[[geometry.pipes]]
index = 5
points_mm = [
  [ -162, 194, 45 ],
  [ -160.763, 188.9129, 64.0687 ],
  [ -157.153, 180.2477, 79.8812 ],
  [ -151.3211, 168.5436, 92.717 ],
  [ -143.4188, 154.3395, 102.8556 ],
  [ -133.5973, 138.1743, 110.5766 ],
  [ -122.008, 120.5871, 116.1596 ],
  [ -108.8022, 102.1169, 119.884 ],
  [ -94.1311, 83.3026, 122.0296 ],
  [ -78.1462, 64.6831, 122.8757 ],
  [ -60.9986, 46.7976, 122.702 ],
  [ -42.8397, 30.185, 121.7881 ],
  [ -23.8208, 15.3842, 120.4134 ],
  [ -4.0933, 2.9342, 118.8576 ],
  [ 16.1917, -6.6259, 117.4002 ],
  [ 36.8826, -12.7573, 116.3208 ],
  [ 57.8284, -14.9208, 115.8988 ]
]

# primaries 2
[[geometry.pipes]]
index = 6
points_mm = [
  [ -54, 194, 45 ],
  [ -52.5634, 190.4508, 60.6385 ],
  [ -48.5035, 184.9694, 73.8883 ],
  [ -42.1951, 177.702, 84.9399 ],
  [ -34.0128, 168.7945, 93.9836 ],
  [ -24.3315, 158.3933, 101.2098 ],
  [ -13.526, 146.6443, 106.8088 ],
  [ -1.9709, 133.6937, 110.971 ],
  [ 9.959, 119.6875, 113.8869 ],
  [ 21.8888, 104.7719, 115.7468 ],
  [ 33.4439, 89.093, 116.741 ],
  [ 44.2495, 72.7969, 117.0599 ],
  [ 53.9308, 56.0297, 116.8939 ],
  [ 62.113, 38.9374, 116.4335 ],
  [ 68.4215, 21.6663, 115.8689 ],
  [ 72.4814, 4.3623, 115.3905 ],
  [ 73.9179, -12.8284, 115.1887 ]
]

# primaries 3
[[geometry.pipes]]
index = 7
points_mm = [
  [ 54, 194, 45 ],
  [ 54.4291, 190.6029, 58.7971 ],
  [ 55.6418, 184.9872, 70.6803 ],
  [ 57.5261, 177.3561, 80.7907 ],
  [ 59.9702, 167.9128, 89.2697 ],
  [ 62.862, 156.8603, 96.2586 ],
  [ 66.0897, 144.4017, 101.8985 ],
  [ 69.5412, 130.7403, 106.3308 ],
  [ 73.1046, 116.0791, 109.6968 ],
  [ 76.6681, 100.6212, 112.1377 ],
  [ 80.1196, 84.5698, 113.7948 ],
  [ 83.3472, 68.1279, 114.8094 ],
  [ 86.2391, 51.4988, 115.3227 ],
  [ 88.6831, 34.8854, 115.476 ],
  [ 90.5675, 18.4911, 115.4106 ],
  [ 91.7801, 2.5188, 115.2677 ],
  [ 92.2093, -12.8284, 115.1887 ]
]

# primaries 4
[[geometry.pipes]]
index = 8
points_mm = [
  [ 162, 194, 45 ],
  [ 161.4216, 190.5899, 58.9539 ],
  [ 159.7871, 184.9857, 70.9535 ],
  [ 157.2474, 177.3856, 81.144 ],
  [ 153.9532, 167.9879, 89.6711 ],
  [ 150.0555, 156.9908, 96.6801 ],
  [ 145.7053, 144.5927, 102.3166 ],
  [ 141.0532, 130.9918, 106.7259 ],
  [ 136.2503, 116.3863, 110.0536 ],
  [ 131.4474, 100.9746, 112.445 ],
  [ 126.7953, 84.9549, 114.0457 ],
  [ 122.445, 68.5255, 115.001 ],
  [ 118.5474, 51.8846, 115.4565 ],
  [ 115.2532, 35.2305, 115.5575 ],
  [ 112.7134, 18.7614, 115.4496 ],
  [ 111.0789, 2.6757, 115.2782 ],
  [ 110.5006, -12.8284, 115.1887 ]
]

# tailpipe
[[geometry.pipes]]
index = 9
points_mm = [
  [ 142.1717, -55, 129.5 ],
  [ 3742.1715, -55, 129.5 ]
]

[[geometry.volumes]]
id = "intake_plenum"
center_mm = [ 0, 194, -367 ]
size_mm = [ 432, 42.8669, 162 ]

[[geometry.volumes]]
id = "exhaust_collector"
center_mm = [ 100, -55, 129.5 ]
size_mm = [ 84.3433, 84.3433, 84.3433 ]