Supercharging device of an engine

Details Supercharging device of an engine Supercharging device of an engine

1989-03-31

1991-06-11

Hart, Douglas

Internal-combustion engines

Charge forming device

Supercharger

F02B 3300

Patent

active

050223755

ABSTRACT:
In the present invention, in addition to a main throttle valve which is conventional, a sub-throttle valve for exclusive use of a mechanical supercharger is provided. By this sub-throttle valve, a flow rate of intake air is throttled by a fixed amount when the mechanical supercharger is switched from a non-connected state to a connected state. This makes it possible to prevent supercharged air from being bypassed to upstream of the supercharger through a bypass and also prevents generation of air intake noises. Moreover, in the case where the mechanical supercharger is of a type involving interior compression, at the time of the switching operation torque shock can be prevented and controllability of engine output by an accelerator pedal is improved.

REFERENCES:
patent: 4350135 (1982-09-01), Casey et al.
patent: 4565178 (1986-01-01), Nagase

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