Two-stroke engine with additional valve (SuperValve)

Abstract

Two-stroke engine with an additional valve, characterized by at least one additional valve (hereinafter referred to as a supervalve) located in the cylinder head and / or cylinder wall. If necessary, the supervalve can significantly reduce the braking effect of the combustion engine (sailing mode) and / or generate a stronger engine braking effect (braking modes): Sailing mode (driver or vehicle does not accelerate or brake). The SuperValve can be opened continuously and / or temporarily during the first stroke (piston moves from bottom to top dead center) and / or the second stroke (piston moves from top to bottom dead center) (piston is decelerated less). Sailing mode can save fuel. In hybrid vehicles (e.g., a combination of at least one internal combustion engine with at least one electric motor / generator and at least one battery), maximum recuperation is achieved. Braking Mode 1 (driver and / or vehicle lightly applies the service brake pedal): The SuperValve remains closed (normal conventional engine braking effect). In hybrid vehicles, maximum recuperation occurs. Braking Mode 2 (driver and / or vehicle applies more force to the service brake pedal than in Braking Mode 1): The SuperValve opens shortly before top dead center and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and remains open during the downward movement of the piston (second stroke). In hybrid vehicles, maximum recuperation occurs. Braking Mode 3 (driver and / or vehicle) applies the service brake pedal more forcefully than in Braking Mode 2): The SuperValve opens shortly before top dead center and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and closes again during the downward movement of the piston (second stroke). In hybrid vehicles, maximum recuperation occurs. Braking mode 4 (driver and / or vehicle) applies the service brake pedal more forcefully than in braking mode 3): The SuperValve opens shortly before top dead center and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and is closed again during the downward movement of the piston (second stroke). In addition, the service brake (conventional brakes, e.g., disc and / or drum brakes) is activated. In hybrid vehicles, maximum recuperation occurs. In hybrid vehicles, the SuperValve is only activated in braking modes when the braking effect from recuperation is too weak. Otherwise, the SuperValve is in coasting mode (when the driver and / or vehicle do not require propulsion). If the driver and / or vehicle require propulsion, the SuperValve remains closed and the combustion engine operates as usual. In hybrid vehicles, the propulsion requirement is met, for example, by the electric motor and / or the combustion engine and / or an air hybrid. When the battery is fully charged (no recuperation), the air flowing through the SuperValve can be used to drive and / or assist at least one turbocharger and / or one compressor and / or one pump (e.g., water pump, oil pump, hydraulic pump) and / or one generator and / or one electric motor, and / or to drive it in a supplementary manner, and / or be stored in at least one compressed air tank. If there is insufficient air in the pressure tank, it can be filled with a compressor.

Description

[0001] The SuperValve allows a two-stroke engine (e.g., a Bühler two-stroke engine) to be put into coasting mode, resulting in significant fuel savings. In hybrid vehicles (e.g., a combination of a combustion engine and an electric motor), this allows for better or more intensive recuperation (e.g., for charging the battery), which also leads to significant fuel savings.

[0002] The SuperValve also eliminates the disadvantage of previous two-stroke engines, namely their inability to generate strong engine braking. This significantly protects the service brakes (e.g., disc brakes and / or drum brakes) (reducing wear). Furthermore, significantly fewer gear changes (manual or automated transmissions or automatic transmissions) are required, which also reduces wear on these systems (also, for example, clutches, torque converters, drivetrain, differential, propshaft, drive shafts, tires).

Claims

[1] Two-stroke engine with additional valve, characterized by that at least one additional valve (hereinafter referred to as SuperValve) is located in the cylinder head and / or cylinder wall. If required, the SuperValve can significantly reduce the engine braking effect (coasting mode) and / or generate a stronger engine braking effect (braking modes): Sailing mode (driver or vehicle neither accelerates nor brakes): The SuperValve can be opened continuously and / or intermittently during the first stroke (piston moves from bottom dead center to top dead center) and / or the second stroke (piston moves from top dead center to bottom dead center), thus reducing piston braking. Sailing mode can save fuel. In hybrid vehicles (e.g., a combination of at least one combustion engine, at least one electric motor / generator, and at least one battery), maximum energy recuperation is achieved. Braking mode 1 (driver and / or vehicle lightly applies the service brake pedal): The SuperValve remains closed (normal, conventional engine braking). Maximum energy recuperation is achieved in hybrid vehicles. Braking mode 2 (driver and / or vehicle applies the service brake pedal more forcefully than in braking mode 1): The SuperValve opens shortly before and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and remains open during the piston's downward movement (second stroke). Maximum energy recuperation occurs in hybrid vehicles. In braking mode 3 (driver and / or vehicle), the service brake pedal is applied more forcefully than in braking mode 2. The SuperValve opens shortly before and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and closes again during the piston's downward movement (second stroke). In hybrid vehicles, maximum energy recuperation occurs. In braking mode 4 (driver and / or vehicle), the service brake pedal is pressed more firmly than in braking mode 3. The SuperValve opens shortly before and / or at top dead center and / or shortly thereafter to release the compressed air from the first stroke and closes again during the piston's downward movement (second stroke). Additionally, the service brakes (conventional brakes, e.g., disc and / or drum brakes) are engaged. In hybrid vehicles, maximum energy recuperation occurs. In hybrid vehicles, the SuperValve is only activated in the braking modes when the braking effect from recuperation is too weak. Otherwise, the SuperValve is in coasting mode (when neither the driver nor the vehicle requires propulsion). If the driver and / or vehicle require propulsion, the SuperValve remains closed and the combustion engine operates in its conventional manner. In hybrid vehicles, the propulsion requirement is met, for example, by the electric motor and / or the combustion engine and / or an air hybrid system. With a fully charged battery (no recuperation), the air flowing through the SuperValve can be used to drive or assist at least one turbocharger, compressor, pump (e.g., water pump, oil pump, hydraulic pump), generator, or electric motor, and / or to store it in at least one compressed air tank. If there is insufficient air in the compressed air tank, it can be filled with a compressor. [2] Two-stroke engine according to claim 1, characterized by , that in hybrid vehicles (e.g. combination of at least one combustion engine and at least one electric motor / generator) the strength of the recuperation can be adjusted by the driver. [3] Two-stroke engine according to claim 1 or 2, characterized by that it can be used as both a single-cylinder and a multi-cylinder engine. [4] Two-stroke engine according to claims 1 to 3, characterized by that it can be used for all types of fuel (e.g. gasoline, diesel, hydrogen).