This fuel injection example demonstrates the ability to integrate a broad range of engineering disciplines to model a complete mechatronic system. This includes a DC motor/pump and pressure regulator system, an electro-hydraulic fuel injector, and a mixed-signal (analog + digital) drive circuit that regulates the injector current.

The design shows the ability to reduce the current after injection-start, for the purpose of improved efficiency. This leverages a characteristic that is common to electro-magnets, in that a lower current is needed to "hold" the magnet closed than is needed for "pull-in".

An alternate pressure regulation design, that varies the voltage of the pump to control the outlet pressure, is show in this companion design: https://www.systemvision.com/design/direct-fuel-pressure-regulation-pump-drive-control

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This example is a car lift powered by a three-phase induction motor driven pump. Three valves are used to control the pump outlet flow, directing it either to the extend port of the hydraulic cylinder or to the tank return. When pressurized, the cylinder lifts the 2000 kg vehicle.

The simulation results show the motor phase A current and shaft speed (see upper left waveform viewer, zoomed in on initial start-up time), as well as the lift position of the car and the extend port pressure (upper right viewer).

This fuel injection example demonstrates the ability to integrate a broad range of engineering disciplines to model a complete mechatronic system. This includes a DC motor/pump and pressure regulator system, an electro-hydraulic fuel injector, and a mixed-signal (analog + digital) drive circuit that regulates the injector current.

The design shows the ability to reduce the current after injection-start, for the purpose of improved efficiency. This leverages a characteristic that is common to electro-magnets, in that a lower current is needed to "hold" the magnet closed than is needed for "pull-in".

An alternate pressure regulation design, that varies the voltage of the pump to control the outlet pressure, is show in this companion design: https://www.systemvision.com/design/direct-fuel-pressure-regulation-pump-drive-control