# Engine definition. Dimensional keys state their units.
schema_version = 2
id = "twin-270"
name = "700 cc / 270-degree parallel twin"
category = "Twins / parallel"
description = "Estimated concept calibration / EFI"
order = 19
cycle = "four_stroke"

[simulation]
cells_per_meter = 50.0

[engine]
bank_angle_deg = 60.0
cylinders = 2
initial_rpm = 1400.0
initialize_phased_charge = true
layout = "inline"
maximum_load_torque_nm = 30.0
minimum_substeps = 1
phase_degrees = [0.0, 450.0]
pipe_damping = 1.0
starter_torque_nm = 17.09026
throttle_diameter_mm = 65.0
topology = "collector"

[cylinder]
afr = 14.7
ambient_temperature_k = 300.0
bore_mm = 80.0
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 = 25.6
fuel_lhv_j_per_kg = 4.4e+07
heat_transfer = 100.0
intake_valve_count = 1
intake_valve_diameter_mm = 30.4
misfire_probability = 0.0
rod_mm = 122.4
stroke_mm = 68.0
wall_area = 0.02
wiebe_a = 5.0
wiebe_m = 2.0

[crankshaft]
friction_constant_nm = 2.734442
friction_quadratic_nm_s2 = 0.0
friction_viscous_nm_s = 0.002734442
inertia_kg_m2 = 0.08203326

[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 = 150.3943
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 = 240.0
primary_reduction = 1.8
rolling_resistance = 0.015
rotational_inertia_kg_m2 = 1.2
wheel_radius_mm = 320.0

[fuel]
system = "injection"

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

[[pipes]]
id = "runners"
count = 2
diameter_mm = 35.0

[[pipes]]
id = "primaries"
count = 2
diameter_mm = 38.0

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

[cam.intake]
points = [
  [0.000, 0.000000],
  [340.000, 0.000000],
  [345.000, 0.145408],
  [350.000, 0.548864],
  [355.000, 1.161216],
  [360.000, 1.933312],
  [365.000, 2.816000],
  [370.000, 3.760128],
  [375.000, 4.716544],
  [380.000, 5.636096],
  [385.000, 6.469632],
  [390.000, 7.168000],
  [395.000, 7.682048],
  [400.000, 7.962624],
  [402.500, 8.000000],
  [527.500, 8.000000],
  [532.500, 7.854592],
  [537.500, 7.451136],
  [542.500, 6.838784],
  [547.500, 6.066688],
  [552.500, 5.184000],
  [557.500, 4.239872],
  [562.500, 3.283456],
  [567.500, 2.363904],
  [572.500, 1.530368],
  [577.500, 0.832000],
  [582.500, 0.317952],
  [587.500, 0.037376],
  [590.000, 0.000000],
  [720.000, 0.000000]
]

[cam.exhaust]
points = [
  [0.000, 0.000000],
  [130.000, 0.000000],
  [135.000, 0.121256],
  [140.000, 0.458807],
  [145.000, 0.973327],
  [150.000, 1.625489],
  [155.000, 2.375967],
  [160.000, 3.185435],
  [165.000, 4.014565],
  [170.000, 4.824033],
  [175.000, 5.574511],
  [180.000, 6.226673],
  [185.000, 6.741193],
  [190.000, 7.078744],
  [195.000, 7.200000],
  [325.000, 7.200000],
  [330.000, 7.078744],
  [335.000, 6.741193],
  [340.000, 6.226673],
  [345.000, 5.574511],
  [350.000, 4.824033],
  [355.000, 4.014565],
  [360.000, 3.185435],
  [365.000, 2.375967],
  [370.000, 1.625489],
  [375.000, 0.973327],
  [380.000, 0.458807],
  [385.000, 0.121256],
  [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 = [ -49, 0, 0 ]
tilt_deg = 0.0

[[geometry.cylinders]]
origin_mm = [ 49, 0, 0 ]
tilt_deg = 0.0

# intake
[[geometry.pipes]]
index = 0
points_mm = [
  [ -298, 155.9556, -354 ],
  [ -98, 155.9556, -354 ]
]

# runners 1
[[geometry.pipes]]
index = 1
points_mm = [
  [ -49, 155.9556, -282 ],
  [ -49, 155.9556, -32 ]
]

# runners 2
[[geometry.pipes]]
index = 2
points_mm = [
  [ 49, 155.9556, -282 ],
  [ 49, 155.9556, -32 ]
]

# primaries 1
[[geometry.pipes]]
index = 3
points_mm = [
  [ -49, 155.9556, 40 ],
  [ -47.6414, 152.9696, 53.5851 ],
  [ -43.8021, 148.472, 65.1692 ],
  [ -37.8363, 142.566, 74.9076 ],
  [ -30.0984, 135.3552, 82.9554 ],
  [ -20.943, 126.9429, 89.4678 ],
  [ -10.7243, 117.4325, 94.5999 ],
  [ 0.2032, 106.9274, 98.5068 ],
  [ 11.485, 95.5311, 101.3437 ],
  [ 22.7669, 83.347, 103.2658 ],
  [ 33.6944, 70.4784, 104.4283 ],
  [ 43.913, 57.0288, 104.9862 ],
  [ 53.0685, 43.1016, 105.0948 ],
  [ 60.8063, 28.8002, 104.9091 ],
  [ 66.7721, 14.2281, 104.5844 ],
  [ 70.6115, -0.5115, 104.2758 ],
  [ 71.9701, -15.315, 104.1385 ]
]

# primaries 2
[[geometry.pipes]]
index = 4
points_mm = [
  [ 49, 155.9556, 40 ],
  [ 49.465, 153.1235, 51.7218 ],
  [ 50.7792, 148.49, 61.9229 ],
  [ 52.8211, 142.2161, 70.709 ],
  [ 55.4697, 134.4629, 78.1854 ],
  [ 58.6034, 125.3916, 84.4576 ],
  [ 62.1011, 115.1632, 89.631 ],
  [ 65.8413, 103.9388, 93.8112 ],
  [ 69.7029, 91.8796, 97.1037 ],
  [ 73.5645, 79.1467, 99.6138 ],
  [ 77.3048, 65.9012, 101.447 ],
  [ 80.8024, 52.3041, 102.7088 ],
  [ 83.9362, 38.5167, 103.5048 ],
  [ 86.5847, 24.6999, 103.9402 ],
  [ 88.6267, 11.015, 104.1207 ],
  [ 89.9409, -2.377, 104.1516 ],
  [ 90.4059, -15.315, 104.1385 ]
]

# tailpipe
[[geometry.pipes]]
index = 5
points_mm = [
  [ 139.685, -55, 119 ],
  [ 1639.685, -55, 119 ]
]

[[geometry.volumes]]
id = "intake_plenum"
center_mm = [ 0, 155.9556, -354 ]
size_mm = [ 196, 70.8617, 144 ]

[[geometry.volumes]]
id = "exhaust_collector"
center_mm = [ 100, -55, 119 ]
size_mm = [ 79.3701, 79.3701, 79.3701 ]