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EP0478099A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

High pressure oil generating apparatus of internal combustion engine

Assignee: Mitsubishi Heavy Industries Ltd
•
Filing: 1991-08-29
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Granted: —
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Expires: 2011-08-29
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Abstract

Abstract The present invention relates to a high pressure oil generating apparatus of an internal combustion engine for driving valves or devices installed in the internal combustion engine with working oil. The construction consists of a cam (4) having one and more lobes fixed to a crank shaft (1) as one body, one and more jerk type high pressure pumps (9) operated by the cam (4), a working oil source (20) for feeding working oil to the high pressure pumps (9), an accumulator (17) for accumulating high pressure working oil discharged from respective high pressure pumps (9) and a control means (16), and is characterized in that the rack positions of above-mentioned respective high pressure pumps (9) are adjusted and the working oil pressure is controlled at a predetermined pressure by the control means (16). Thus, the high pressure oil generating apparatus is applied practically for controlling the fuel injection quantity of the internal combustion engine and for controlling a suction/discharge valve, and particularly for controlling operation of a discharge valve.

Inventors

  • 👤 Yasutaka c/o Yokohama Dockyard Machin.Wrks Irie
  • 👤 Shigemi c/o Yokohama Dockyard Machin.Wrks Ono
  • 👤 Etsuo c/o Nagasaki Techn. Inst. Kunimoto
  • 👤 Youzou c/o Nagasaki Techn. Inst. Tosa
  • 👤 Yoshinori c/o Nagasaki Techn. Inst. Nagae

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 19:49
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/02; F02M59/10; F02M59/105; F02M47/00; F01; F01L; F01L9/00; F01L9/10; F01M; F01M1/00; F01M1/02; F02M59/04; F02M59/06

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 135 words
A high pressure oil generating apparatus of an internal combustion engine for driving valves or devices and the like installed in the internal combustion engine with working oil, comprising: a cam having one and more lobes fixed to a crank shaft of said engine as one body; one and more jerk type high pressure pumps operated by said cam; a working oil source for feeding working oil to said high pressure pumps; an accumulator or a gathering pipe for accumulating high pressure working oil discharged from respective high pressure pumps; and a control means which detects working oil pressure in said accumulator or gathering pipe and adjusts rack positions of said respective high pressure pumps based on deviation thereof from a predetermined pressure so as to control said working oil pressure at said predetermined pressure.
Claim 2
Dependent Claim 30 words
A high pressure oil generating apparatus of an internal combustion engine according to Claim 1, characterized in that said high pressure pumps are arranged at equal intervals around said cam.
Claim 3
Dependent Claim 186 words
A high pressure oil generating apparatus of an internal combustion engine for driving valves or devices and the like installed in the internal combustion engine with working oil, comprising: a cam having one and more lobes fixed to a crank shaft of said engine as one body, one and more jerk type high pressure pumps operated by said cam; a working oil source for feeding working oil to said high pressure pumps; an accumulator or a gathering pipe for accumulating high pressure working oil discharged from respective high pressure pumps; a control means which detects working oil pressure in said accumulator or gathering pipe and adjusts rack positions of said respective high pressure pumps based on deviation thereof from a predetermined pressure so as to control said working oil pressure at said predetermined pressure; a crank angle detector; an oil pressure driven fuel injector; a switching valve provided between a pressure chamber of said fuel injector and said accumulator or gathering pipe; and a control means which opens and closes said switching valve at a predetermined timing based on a signal of said crank angle detector.
Claim 4
Dependent Claim 31 words
A high pressure oil generating apparatus of an internal combustion engine according to Claim 3, comprising a starting booster which feeds high pressure working oil to said accumulator or gathering pipe.
Claim 5
Dependent Claim 186 words
A high pressure oil generating apparatus of an internal combustion engine for driving valves or devices and the like installed in the internal combustion engine with working oil, comprising: a cam having one and more lobes fixed to a crank shaft of said engine as one body; one and more jerk type high pressure pumps operated by said cam; a working oil source for feeding working oil to said high pressure pumps; an accumulator or a gathering pipe for accumulating high pressure working oil discharged from respective high pressure pumps; a control means which detects working oil pressure in said accumulator or gathering pipe and adjusts rack positions of said respective high pressure pumps based on deviation thereof from a predetermined pressure so as to control said working oil pressure at said predetermined pressure, a crank angle detector; an oil pressure driven valve device; a switching valve provided between a pressure chamber of said valve device and said accumulator or gathering pipe; and a control means which opens and closes said switching valve at a predetermined timing based on a signal of said crank angle detector.
Claim 6
Dependent Claim 31 words
A high pressure oil generating apparatus of an internal combustion engine according to Claim 5, comprising a starting booster which feeds high pressure working oil to said accumulator or gathering pipe.

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