JPS58167732U - Internal combustion engine with exhaust turbocharger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a preferred embodiment of an internal combustion engine with an exhaust turbo supercharger according to the present invention, and FIG.
3 is an intake valve lift diagram showing the opening/closing timing of the on-off valve adopted in the present invention, and Figure 4 is an internal combustion engine equipped with an exhaust turbo supercharger according to the present invention. FIG. In the figure, 1 is the internal combustion engine, 3 is its intake port, 7 is the intake system, and 8
is an exhaust system, 10 is a turbine, 10a is its exhaust inlet,
11 is the compressor, 11a is its suction port, 11b
12 is a drive shaft, 14 is an exhaust bypass passage, 15 is an intake bypass passage, 16 is a first bypass opening/closing valve, 17 is a second bypass opening/closing valve, 18 is a pressure accumulation chamber, 19
Reference numeral 21 indicates a discharge port side passage, 21 indicates a pressure supercharging passage, and 22 indicates an on-off valve. 11 s --, 242224 1" 22 Third amendment to the drawings June 9, 1982 The scope of claims for utility model registration and the brief description of the drawings are amended as follows. O Scope of claims for utility model registration 1 (1) ) In an internal combustion engine equipped with an exhaust turbo supercharger that drives a compressor installed in the intake system via the same drive shaft by a turbine installed in the exhaust system and supplies pressurized air to the internal combustion engine, the above-mentioned an exhaust bypass passage for branching from the upstream side of the exhaust gas inlet of the turbine and detouring the exhaust gas to the downstream side of the turbine; a first bypass opening/closing valve provided in the exhaust bypass passage for opening and closing the exhaust bypass passage; An intake bypass passage is provided in the intake system to bypass the intake side and the discharge side of the compressor, and the intake bypass passage is opened in synchronization with the opening of the exhaust bypass passage, and the exhaust bypass passage of the compressor is opened. For accumulating pressure air discharged from this on the outlet side.A second bypass opening/closing valve defining a pressure accumulation chamber, a pressure air supercharging passage connecting the pressure accumulation chamber and the internal combustion engine, and the pressure air supercharging passage. and an on-off valve for supercharging the internal combustion engine with the pressure air accumulated from the pressure accumulation chamber during an appropriate period during the opening period of the intake valve of the internal combustion engine. (2) The pressure accumulation chamber is defined by the second bypass on-off valve that blocks off a passage connected to the discharge side of the compressor by a predetermined length from the discharge port. An internal combustion engine with an exhaust turbo supercharger according to claim 1 of the registered utility model.' (3) An outlet side of the pressure air supercharging passage is open facing the intake port of the internal combustion engine. An internal combustion engine with an exhaust turbocharger as claimed in any one of claims 1 to 2 of the above-mentioned utility model registration claim, characterized in that: BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a preferred embodiment of an internal combustion engine with an exhaust turbo supercharger according to the present invention, and FIG.
-■ A sectional view taken along the line; Figure 3 is an intake valve lift diagram showing the opening/closing timing of the on-off valve adopted in the present invention. Figure 4 is an internal combustion engine equipped with an exhaust turbo supercharger according to the present invention. performance diagram,
FIG. 5 is a side sectional view showing a modification of the above embodiment, and FIG. 6 is a sectional view taken along the line IV--IV in FIG. In the figure, 1 is the internal combustion engine, 3 is its intake port, 7 is the intake system, and 8
is an exhaust system, 10 is a turbine, 10a is its exhaust inlet,
11 is a compressor, 11a is its suction port, 1-1b is a discharge port, 12 is a drive shaft, 14 is an exhaust bypass passage, 15
1 is an intake bypass passage, 16 is a first bypass opening/closing valve, 1
7 is a second bypass on-off valve, 18 is a pressure accumulation chamber, 19 is a passage on the discharge port side, 21 is a pressure air supercharging passage, and 22 is an on-off valve.

Claims (3)

[Scope of utility model registration request] (1) In an internal combustion engine equipped with an exhaust turbo supercharger that drives a compressor installed in the intake system through the same drive shaft by a turbine installed in the exhaust system, and supplies pressurized air to the internal combustion engine. , an exhaust bypass passage for branching from the upstream side of the exhaust gas inlet of the turbine to bypass the exhaust gas to the downstream side of the turbine; and a first bypass opening/closing provided in the exhaust bypass passage for opening and closing the exhaust bypass passage. a valve, an intake bypass passage provided in the intake system for bypassing the suction port side and the discharge port side of the compressor, and opening the intake bypass passage in synchronization with opening of the exhaust bypass passage; a second bypass opening/closing valve defining a pressure accumulation chamber for accumulating pressure air discharged from the compressor on the discharge port side of the compressor; a pressure air supercharging passage connecting the pressure accumulation chamber and the internal combustion engine; and an on-off valve provided in the supply passage for supercharging the internal combustion engine with the pressure air accumulated from the pressure accumulation chamber during an appropriate period of the valve opening movement of the intake valve of the internal combustion engine. Features an internal combustion engine with an exhaust turbo supercharger. (2) The above-mentioned utility model characterized in that the above-mentioned pressure accumulation chamber is defined by the above-mentioned second bypass on-off valve that blocks off a passage connected to the discharge side of the compressor by a predetermined length from the discharge port thereof. An internal combustion engine with an exhaust turbo supercharger according to the first registered claim.゛ (3) The exhaust turbo supercharger according to claim 1 or 2, wherein the outlet side of the pressurized air supercharging passage is opened facing the intake port of the internal combustion engine. Internal combustion engine.