Patents Assigned to Regie Nationale Des Usines Renault S.A.
  • Patent number: 5676099
    Abstract: An internal combustion engine at least two intake valves and one exhaust valve per cylinder. The valves are actuated by an intake camshaft and an exhaust camshaft operating with variable timings. The internal combustion engine is also provided with an intake system having separate intake ducts leading to the intake valves. One control flap is provided in at least one intake duct. To optimize the operation of the internal combustion engine with regard to exhaust emissions, fuel consumption, performance, and torque, the timings of the valves and the throughputs of the intake ducts are influenced as a function of the defined characteristic map areas of a torque-rpm graph.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: October 14, 1997
    Assignees: Ing. h.c.F. Porsche AG, Regie Nationale des Usines Renault S.A.
    Inventor: Manfred Bier
  • Patent number: 5474047
    Abstract: A process for supplying fuel to an internal combustion engine of the multi-cylinder type with controlled fuel injection and comprising a controlled fuel vapor recovery system. During predetermined operating phases of the engine, the fuel injection is stopped for a given period, while the fuel vapors trapped in the recovery system are recycled into an intake circuit of the engine.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: December 12, 1995
    Assignee: Regie Nationale Des Usines Renault S.A.
    Inventors: Pierre Cochard, Bernard Vallee
  • Patent number: 5425340
    Abstract: A system for producing a signal for marking cylinders for control of a phased sequential multipoint injection in an engine including a crankshaft sensor for providing a marking of passings of a top dead center for each of the cylinders and a system for detecting combustion misfires. The system includes the following successive steps. First, injection of fuel for a predetermined reference cylinder is stopped. An occurrence of a combustion misfire for the predetermined reference cylinder is then detected. The moment of stopping of the injection and the moment of detecting the combustion misfire is then compared, and the moment of passing of the intake or firing top dead center for the predetermined reference cylinder is identified. A signal for marking cylinders in phase with the top dead center signal is then produced, initialized at the moment of passing an intake or firing top dead center of the reference cylinder and resuming the sequence of the combustions.
    Type: Grant
    Filed: June 23, 1993
    Date of Patent: June 20, 1995
    Assignee: Regie Nationale des Usines Renault S.A.
    Inventors: Armelle Petitbon, Jean-Marc Hornewer
  • Patent number: 5409426
    Abstract: Automatic transmission control device with stepped gears comprising a torque converter (1) equipped with bridging means (6, 6'), a planetary gear train (2), several hydraulic receivers (E.sub.i, F.sub.i) assuring the switching of planetary gear train (2), and a hydraulic distributor (16, 17) delivering a line pressure PL, which makes it possible to feed selectively receivers (E.sub.i, F.sub.i) under the control of a computer, according to the data concerning the operation of the vehicle equipped with the transmission, characterized in that at least one switching element (8) is dimensioned to be able to slip in a controlled manner, particularly when converter (1) is bridged, in response to a momentary reduction of line pressure PL, and in that this slipping is servocontrolled, by line pressure PL, at set values depending on torque Cm and engine speed .omega.m.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: April 25, 1995
    Assignee: Regie Nationale Des Usines Renault S.A.
    Inventors: Jean-Paul Berthe, Benoit Honore, Francois Leorat
  • Patent number: 5267251
    Abstract: A line interface for a two wire bus for detecting defects of the bus. The interface includes a shaping circuit having three comparators. The first comparator having two inputs connected to the two wires of the bus, the second comparator having a first input connected to one of the bus wires and another input connected to a reference signal, and the third comparator having a first input connected to the other wire of the bus and the second input connected to a reference signal. A first counter is connected to the output of the first comparator and counts a number of transitions which occur on the bus during a predetermined period of time. If the number of transitions detected by the first comparator is counted to be less than a predetermined number of transitions, the bus is defective. The second and third counters are respectively connected to the second and third comparators.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: November 30, 1993
    Assignee: Regie Nationale des Usines Renault S.A.
    Inventors: Dominique Lenoir, Jean-Michel Remaud
  • Patent number: 5115791
    Abstract: The invention concerns a crankcase or cylinder block for an internal combustion engine of any type, for example, of the V or in-line cylinder type. The upper half of the crankcase comprises internal conduits which connect the upper part of the crankcase with the lower compartments separating the crankshaft bearings, these conduits making possible the exhaust of crankcase gases and the recycling of the engine oil and opening into a chamber of a flat shape, with said chamber and said internal conduits forming an integral as-cast system. The invention applies in particular to the automotive industry.
    Type: Grant
    Filed: July 11, 1991
    Date of Patent: May 26, 1992
    Assignees: Automobiles Peugeot, Automobiles Citroen, Regie Nationale des Usines Renault S.A.
    Inventor: Jacques Dore
  • Patent number: 5033566
    Abstract: Device for steering the rear wheels of a vehicle with four wheel steering comprising an electric drive systems (1), a bolt-nut system (2) and a reduction mechanism (3), bolt (4) is placed between two guide elements (5) and is integral with an interball joint bar (6) by two connecting elements (7), said interball joint bar (6) being parallel to bolt (4); the unit being supported by a central plate (8) which receives two cases placed on both sides of said plate (8) to which they are attached so as to have a closed unit, interball joint bar (6) passing through said central plate (8).
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: July 23, 1991
    Assignee: Regie Nationale Des Usines Renault S.A.
    Inventors: Antonio Moretti, Jean-Louis Laffont, Pascal Vaumoron