Technique of detecting intake pressure of fuel
AssigneeHonda Motor Co., Ltd.
InventorYoichi Yamamura
Life of this patent
Estimating the term…
Abstract
An intake pressure sensor is provided in an intake path of a single cylinder engine and detects an intake pressure. A crank angle sensor detects a crank angle of the single cylinder engine. A sampling unit samples the intake pressure detected by the intake pressure sensor when the crank angle detected by the crank angle sensor becomes a sampling start angle. A calculation unit extracts M intake pressures of relatively small values of N intake pressures sampled by the sampling unit. The calculation unit acquires, as a bottom pressure, an average value of P intake pressures remaining after several intake pressures of relatively large values and several intake pressures of relatively small values of the M intake pressures are excluded.
Claims9
An intake pressure detection apparatus comprising:
- an intake pressure sensor provided in an intake path of a single cylinder engine and configured to detect an intake pressure;
- a crank angle sensor configured to detect a crank angle of the single cylinder engine;
- a sampling unit configured to sample the intake pressure detected by the intake pressure sensor when the crank angle detected by the crank angle sensor becomes a sampling start angle;
- and
- a calculation unit configured to extract M intake pressures of relatively small values of N intake pressures sampled by the sampling unit and acquire, as a bottom pressure, an average value of P intake pressures remaining after several intake pressures of relatively large values and several intake pressures of relatively small values of the M intake pressures are excluded.
An intake pressure detection apparatus comprising:
- an intake pressure sensor provided in an intake path of a single cylinder engine and configured to detect an intake pressure;
- a sampling unit configured to sample the intake pressure detected by the intake pressure sensor in an intake stroke of the single cylinder engine;
- and
- a calculation unit configured to extract M intake pressures of relatively small values of N intake pressures sampled by the sampling unit and acquire, as a bottom pressure, an average value of P intake pressures remaining after several intake pressures of relatively large values and several intake pressures of relatively small values of the M intake pressures are excluded.
An electronically controlled fuel supply apparatus comprising:
- an intake pressure sensor provided in an intake path of a single cylinder engine and configured to detect an intake pressure;
- a crank angle sensor configured to detect a crank angle of the single cylinder engine;
- a sampling unit configured to sample the intake pressure detected by the intake pressure sensor when the crank angle detected by the crank angle sensor becomes a sampling start angle;
- a calculation unit configured to extract M intake pressures of relatively small values of N intake pressures sampled by the sampling unit and acquire, as a bottom pressure, an average value of P intake pressures remaining after several intake pressures of relatively large values and several intake pressures of relatively small values of the M intake pressures are excluded;
- a decision unit configured to decide an injection amount of fuel to implement a predetermined air fuel ratio based on the average value of the intake pressures obtained by the calculation unit;
- and
- an injector configured to inject the fuel in the injection amount decided by the decision unit.
Dependencies are inferred from the claim text.