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| Number | Title | Issue Date |
| 7353812 | Vehicle engine with integral vacuum generator An integral vacuum generator system for an internal combustion engine includes a throttle body and intake manifold defining a bypass passage which is connected with a vacuum manifold by both a venturi and a direct vacuum supply passage. Vacuum flow through the ventu... | 04/08/2008 |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 4633845 | Vacuum control device A device for selectively modifying the vacuum level provided by a variable vacuum source is described, which generally includes a housing having two inlet ports and an outlet port. The first inlet port provides communication between the housing and the va... | 01/06/1987 |
| 4563998 | Control arrangement for an internal combustion engine A control arrangement for an internal combustion engine equipped with vacuum-operated control devices includes a method and apparatus for applying a vacuum to a control device, retaining the vacuum for a specified time or under specified engine operating ... | 01/14/1986 |
| 4434776 | EGR Control system An EGR system has two vacuum modulation valves, one responsive to venturi vacuum and "EGR" pressure (which prevails just upstream of the EGR flow control valve) and the other responsive to venturi vacuum and induction vacuum. The first valve predominately... | 03/06/1984 |
| 4398525 | Multi-stage exhaust gas recirculation system An automotive type exhaust gas recirculation (EGR) system has two modes of operation, a first one that regulates EGR flow at a constant percentage rate as a function of throttle valve position independently of exhaust gas backpressure changes, and a secon... | 08/16/1983 |
| 4369752 | Exhaust gas purification control apparatus for internal combustion engine An exhaust gas purification control apparatus for an internal combustion engine wherein vacuum signals applied to air fuel mixture control, exhaust gas recirculation control, and ignition timing control are modified by a vacuum signal modifier. The vacuum... | 01/25/1983 |
| 4351303 | Manually adjustable valve means for an exhaust gas recirculation system An improvement to an interval combustion engine having an exhaust gas recirculation system which comprises a negative pressure line from the carburetor communicating with valve means to control the amount of recycled exhaust, the improvement being provide... | 09/28/1982 |
| 4282846 | Exhaust gas recirculating device An exhaust gas recirculating device having a regulator integrally formed with an air horn of the carburetor, a throttle body and an insulator, both secured to a carburetor flange, a groove cut on the underside of the carburetor flange, a plate interposed ... | 08/11/1981 |
| 4274384 | Engine exhaust gas recirculation system An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air... | 06/23/1981 |
| 4273092 | Exhaust gas recirculation system with engine load dependent performance An exhaust gas recirculation system is disclosed, which is of the well-known type wherein an exhaust gas recirculation control valve in the exhaust gas recirculation passage controls the amount of exhaust gas recirculation. An orifice element, upstream of... | 06/16/1981 |
| 4249490 | Exhaust gas recirculation for engine An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air... | 02/10/1981 |
| 4249503 | Exhaust gas recirculation for engine An exhaust gas recirculation system for an internal combustion engine employs an exhaust gas recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. The intake pass... | 02/10/1981 |
| 4242998 | Engine exhaust gas recirculation system An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air... | 01/06/1981 |
| 4235208 | Exhaust gas recirculation regulating system A system for controlling introduction of gas into a passage of an internal combustion engine employs a first control valve in a gas introduction passageway, a second control valve in an air conduit connecting the intake passage to atmosphere, and a regula... | 11/25/1980 |
| 4222355 | Exhaust gas recirculation apparatus for an internal combustion engine Disclosed herein is an internal combustion engine provided with an exhaust gas recirculation system of so-called back pressure control type. The exhaust gas recirculation system is provided with a vacuum line connecting a so-called EGR port with a vacuum ... | 09/16/1980 |
| 4203400 | Exhaust gas recirculation system for an internal combustion engine An exhaust gas recirculation system for an internal combustion engine wherein a fixed restriction, a pressure chamber and a pressure control valve are arranged in the order named in an exhaust gas recirculation passage and the pressure control valve is co... | 05/20/1980 |
| 4190031 | Devices for re-cycling the exhaust gases of an internal combustion engine The device regulates the flow of exhaust gas reintroduced in the induction pipe in accordance with the conditions of utilization of the engine. It consists mainly in modifying a depression case the movable wall of which is connected by a cable to the clos... | 02/26/1980 |
| 4186699 | Exhaust gas recirculation system An exhaust gas recirculation system comprises a valve assembly for controlling the recirculation of exhaust gases in such a manner as to maintain a difference between a first and second pressure at a predetermined value. The first pressure is a pressure i... | 02/05/1980 |
| 4180033 | Exhaust gas recirculation control system An altitude correction device is provided which adjusts a working vacuum, in the diaphragm unit for operating the EGR control valve, in accordance with the atmospheric pressure so as to reduce the flow of recirculated engine exhaust gases in accordance wi... | 12/25/1979 |
| 4178896 | Exhaust gas recycling system Controlled exhaust gas recycling can be accomplished by a pneumatically actuated valve which restricts the flow of exhaust gas from an exhaust manifold of an internal combustion engine to the intake manifold. Exhaust gas may be removed from the manifold a... | 12/18/1979 |
| 4176636 | Internal combustion engine having exhaust emission control system Air bleeding apparatus for an exhaust emission control system comprising three plates joined face to face. The first plate has a plurality of grooves each communicating at one end with a vacuum source and at the other end with a vacuum actuator for an ign... | 12/04/1979 |
| 4114576 | Exhaust gas recirculating control system An exhaust gas recirculating control system for internal combustion engines including an engine vacuum operated exhaust gas recirculating valve which allows recirculation of the engine exhaust when a high vacuum is applied, an engine vacuum operated vacuu... | 09/19/1978 |
| 4106452 | Exhaust gas recirculator An exhaust gas recirculator in an internal combustion engine wherein a part of the exhaust gas is supplied to a suction manifold only at the time when the throttle valve is opened and in some time interval immediately after the time afterwards, and the su... | 08/15/1978 |
| 4099497 | Internal combustion engine having exhaust emission control system The characteristics of an exhaust emission control system can be varied by bleeding air into a vacuum conduit through which a vacuum is applied to a vacuum actuator in the exhaust emission control system. Means for bleeding air into the vacuum conduit inc... | 07/11/1978 |
| 4080941 | Device for recycling the exhaust gases of an internal combustion engine The device comprises a recycling passage interconnecting the induction pipe and exhaust pipe of the engine. A valve for regulating the flow in the passage is controlled by the movable wall of a suction capsule. The inside of the capsule communicates with ... | 03/28/1978 |
| 4041915 | Apparatus to control the recirculation of exhaust gases into the intake passage in an internal combustion engine A diaphragm assembly operates to open an exhaust gas recirculation control valve when the suction in the intake manifold decreases at a predetermined rate with respect to time as during acceleration.... | 08/16/1977 |
| 4002154 | Vacuum delay and shutoff valve A vacuum operated valve and vacuum delay device is disclosed. The device, which may be connected to a variable vacuum source and employed to serve a vacuum operated switch or valve, includes a bleed orifice for restricting the passage of air therethrough ... | 01/11/1977 |
| 3998194 | System for control of exhaust gas recirculation In an automotive internal combustion engine, metered quantities of exhaust gases are recirculated by way of a control valve to the intake manifold of the engine in order to control temperatures within the combustion chambers, thereby reducing formation of... | 12/21/1976 |
| 3977381 | Exhaust gas recirculation system An auxiliary flow control valve is disposed in an exhaust gas recirculation passageway at a location upstream of a main flow control valve controlling the flow rate of exhaust gases recirculated into an intake system. Two conduits communicating with an in... | 08/31/1976 |
