Installation for the advance of the ignition point

Claim 2

An installation for advancing the ignition point in internal combustion engines, which includes a vacuum-operated actuator means operatively connected with a suction pipe of the engine and normally controlled by the suction pipe vacuum, said vacuumoperated actuator means acting on a distributor means, characterized by valve mEans for closing the connection of the vacuum-operated actuator means to the suction pipe vacuum, when driving with a cold internal combustion engine, and for selectively connecting the vacuum-operated actuator means with a vacuum reservoir means to thereby advance the ignition instant in said distributor means over the entire range of throttle position of the engine while the latter remains cold.

Claim 3

An installation according to claim 1, characterized in that the engine is an Otto engine of a motor vehicle, and in that the reservoir means is located in a motor vehicle.

Claim 4

An installation according to claim 2, characterized in that the reservoir means is formed in effect by a brake-force servo means.

Claim 5

An installation according to claim 1, characterized in that a valve means is provided for controlling the connections of the vacuum operated actuator means which responds to the temperature of the internal combustion engine.

Claim 6

An installation according to claim 4, characterized in that the valve means responds directly to the temperature of the engine.

Claim 7

An installation according to claim 4, characterized in that the valve means responds indirectly to the temperature of the internal combustion engine.

Claim 8

An installation according to claim 4, characterized in that the valve means responds to the temperature of the lubricating oil.

Claim 9

An installation according to claim 4, characterized in that the valve means responds to the temperature of the cooling water.

Claim 10

An installation according to claim 4, characterized in that a pre-stressed bimetallic plate means operable to shift substantially instantaneously is arranged in the valve means.

Claim 11

An installation according to claim 9, characterized in that a closure body means is arranged at the bimetallic plate means which selectively opens and closes two mutually opposite bore means and which is operable to selectively connect the actuator means either with the suction pipe vacuum or with the vacuum reservoir means.

Claim 12

An installation according to claim 10, characterized in that said closure body means is of substantially spherical shape.

Claim 13

An installation according to claim 10, characterized in that said bimetallic plate means operates with large hysteresis.

Claim 14

An installation according to claim 12, characterized in that the necessary vacuum is produced by an auxiliary pump.

Claim 15

An installation according to claim 9, characterized in that said bimetallic plate means operates with large hysteresis.

Claim 16

An installation according to claim 1, characterized in that the necessary vacuum is produced by an auxiliary pump.

Claim 17

An installation according to claim 1, wherein said valve means includes a valve housing having three connecting means forming effectively three ports, two of said ports being disposed substantially opposite one another and being connected with the suction pipe and the vacuum reservoir means while the third port is connected with the vacuum-operated actuator means.

Claim 18

An installation according to claim 16, characterized by a single closure member selectively opening and closing said two ports in response to engine temperature.

Claim 19

An installation according to claim 17, characterized by temperature sensitive means for actuating said closure member and rigidly secured to the latter.

Claim 20

An installation according to claim 18, characterized in that said temperature sensitive means is a bimetallic element sensing directly the engine temperature.

Claim 21

An installation according to claim 1, wherein said valve means is provided with two ports and includes a closure member for said two ports and heat-sensing means directly sensing the engine temperature and directly and securely connected to said closure member for actuating the latter in dependence of engine temperature.

Claim 22

An installation according to claim 20, wherein said closure member is an approximately circularly shaped valve member with a bimetallic element extending as heat-sensing means through said valve membeR.

Claim 23

In an installation for advancing the ignition instant in an internal combustion engine, when the engine is cold, by selectively connecting a control means for an ignition distributor with a source of vacuum in lieu of a suction pipe until the engine reaches a predetermined temperature, the improvement comprising a valve adapted to be interposed between said control means, said suction pipe and said source of vacuum which comprises a valve housing provided with three ports, two of said ports being disposed substantially mutually opposite one another and being connected with said suction pipe and said source of vacuum, respectively, while the third port is in communication with a valve space, and a single closure member operable to selectively open one of said two ports while closing the other or opening said other while closing said one, and heat sensing means for actuating said closure member and directly coupled thereto.

Claim 24

In an installation for advancing the ignition instant in an internal combustion engine, when the engine is cold, by selectively connecting a control means for an ignition distributor with a source of vacuum in lieu of a suction pipe until the engine reaches a predetermined temperature, the improvement comprising a valve adapted to be interposed between said control means, said suction pipe and said source of vacuum which comprises a valve housing provided with three ports, two of said ports being disposed substantially mutually opposite one another and being connected with said suction pipe and said source of vacuum, respectively, while the third port is in communication with a valve space, and a single closure member operable to selectively open one of said two ports while closing the other or opening said other while closing said one, and heat sensing means for actuating said closure member and directly coupled thereto.

Claim 25

The combination according to claim 22, wherein said closure member as well as said heat sensing means are arranged in said valve space.

Claim 26

The combination according to claim 23, wherein said heat sensing means is a bimetallic element.