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US 10,895,216 B2Granted
Control device of internal combustion engine
AssigneesToyota Jidosha Kabushiki Kaisha, Denso Corporation
InventorsToru Suda, Rintarou Tachibana, Tetsuji Nagata
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Abstract
A controller of a control device of an internal combustion engine includes: a storage configured to store fuel pressure detected during injection of one port injection valve of port injection valves in association with another port injection valve, of the port injection valves, scheduled to inject fuel after one or two cycles of the fuel pressure pulsation elapsing from injection of the one port injection valve; and a calculator configured to calculate an energization period of the another port injection valve based on the stored fuel pressure.
Claims12
A control device of an internal combustion engine comprising:
- cylinder injection valves that respectively inject fuel directly into cylinders of the internal combustion engine;
- a first port injection valve and a second port injection valve that respectively inject fuel into a first intake port and a second intake port of the internal combustion engine;
- a low pressure pump that supplies pressurized fuel to the first port injection valve and the second port injection valve via a low pressure fuel passage;
- a high pressure pump driven in conjunction with a crankshaft of the internal combustion engine, the high pressure pump being configured to further pressurize the fuel supplied from the low pressure pump and supply the further pressurized fuel to the cylinder injection valves via a high pressure fuel passage that branches off from the low pressure fuel passage,
- wherein the high pressure pump generates at least one cycle of fuel pressure pulsation in the low pressure fuel passage;
- a fuel pressure sensor that detects a fuel pressure in the low pressure fuel passage;
- a crank angle sensor that detects a rotational angle of the crankshaft of the internal combustion engine;
- and
- a controller configured to:
- calculate a first energization period of the first port injection valve and a second energization period of the second port injection valve, the first energization period and the second energization period corresponding to a respective required injection quantity,
- wherein the second energization period of the second port injection valve is based on a stored fuel pressure that was detected in the low pressure fuel passage via the fuel pressure sensor during an injection by the first port injection valve, the stored fuel pressure being updated by the controller whenever the first port injection valve injects fuel;
- energize the first port injection valve in a first instance of a predetermined crank angle interval only for the first calculated energization period;
- and
- energize the second port injection valve in a second instance of the predetermined crank angle interval only for the second calculated energization period,
- wherein the second port injection valve is scheduled to inject fuel after the at least one cycle of fuel pressure pulsation elapses after the injection by the first port injection valve.
12 more elements
A control device of an internal combustion engine comprising:
- cylinder injection valves that respectively inject fuel directly into cylinders of the internal combustion engine;
- a first port injection valve and a second port injection valve that respectively inject fuel into a first intake port and a second intake port of the internal combustion engine;
- a low pressure pump that supplies pressurized fuel to the first port injection valve and the second port injection valve via a low pressure fuel passage;
- a high pressure pump driven by a cam that is interlocked with a crankshaft of the internal combustion engine, the high pressure pump being configured to further pressurize the fuel supplied from the low pressure pump and supply the further pressurized fuel to the cylinder injection valves via a high pressure fuel passage that branches off from the low pressure fuel passage,
- wherein the high pressure pump generates at least one cycle of fuel pressure pulsation in the low pressure fuel passage;
- a fuel pressure sensor that detects a fuel pressure in the low pressure fuel passage;
- a crank angle sensor that detects a rotational angle of the crankshaft of the internal combustion engine;
- and
- a controller configured to:
- calculate a first energization period of the first port injection valve and a second energization period of the second port injection valve, the first energization period and the second energization period corresponding to a respective required injection quantity,
- wherein the second energization period of the second port injection valve is based on a stored fuel pressure that was detected in the low pressure fuel passage via the fuel pressure sensor during an injection by the first port injection valve, the stored fuel pressure being updated by the controller whenever the first port injection valve injects fuel;
- energize the first port injection valve in a first instance of a predetermined crank angle interval only for the first calculated energization period;
- and
- energize the second port injection valve in a second instance of the predetermined crank angle interval only for the second calculated energization period,
- wherein the second port injection valve is scheduled to inject fuel after the at least one cycle of fuel pressure pulsation elapses after the injection by the first port injection valve.
12 more elements
Dependencies are inferred from the claim text.