48 lines
1.9 KiB
C++
48 lines
1.9 KiB
C++
#pragma once
|
|
|
|
#include "FluidSim/Crankcase.hpp"
|
|
#include <cstdint>
|
|
|
|
namespace fluidsim::port {
|
|
|
|
class Carburetor;
|
|
|
|
// Two-stroke variant of the reciprocating cylinder model. The shared four-
|
|
// stroke implementation supplies geometry, state balance, and combustion
|
|
// parameters; cycle events and pumping torque are specialized here.
|
|
class TwoStrokeCylinder final : public EngineCylinder {
|
|
public:
|
|
TwoStrokeCylinder(float bore, float stroke, float connecting_rod_length,
|
|
float compression_ratio, float transfer_duration_degrees,
|
|
float exhaust_duration_degrees);
|
|
|
|
float transfer_open() const { return 180.0f - transfer_duration_ * 0.5f; }
|
|
float transfer_close() const { return 180.0f + transfer_duration_ * 0.5f; }
|
|
float exhaust_open() const { return 180.0f - exhaust_duration_ * 0.5f; }
|
|
float exhaust_close() const { return 180.0f + exhaust_duration_ * 0.5f; }
|
|
void set_crankcase(Crankcase& crankcase) { crankcase_ = &crankcase; }
|
|
void set_carburetor(Carburetor& carburetor) { carburetor_ = &carburetor; }
|
|
float transfer_width{.050f}, exhaust_width{.036f};
|
|
// Retained as two-stroke compatibility metadata; port areas come from the
|
|
// transfer and exhaust geometry above rather than poppet valve motion.
|
|
float intake_valve_lift{}, exhaust_valve_lift{};
|
|
float minimum_burn_seconds{.0008f};
|
|
std::uint64_t combustion_count() const { return combustion_count_; }
|
|
|
|
float valve_area(float cycle_degrees, bool inlet) const override;
|
|
void pre_step(Crankshaft& crank, float dt, float throttle) override;
|
|
|
|
private:
|
|
float transfer_duration_{}, exhaust_duration_{};
|
|
Crankcase* crankcase_{};
|
|
Carburetor* carburetor_{};
|
|
|
|
float active_burn_duration_{60};
|
|
float current_rpm_{};
|
|
float active_spark_angle_{};
|
|
std::uint64_t combustion_count_{};
|
|
void handle_cycle_events(float previous_degrees, float current_degrees);
|
|
};
|
|
|
|
} // namespace fluidsim::port
|