DE3234128A1 - Starting aid and mixture preparation support principally for cold starting of spark-ignition engines - Google Patents

Abstract

The state of the art is the starting aid for supporting the mixture preparation principally when cold starting spark-ignition engines by electrical resistance heating. This is necessary by reason of the exhaust emissions legislation. Processes exist which owing to an enlarged surface are more efficient in getting fuel particles to evaporate, principally in the starting phase (MTZ December 1982 Report: The new 55kW engine as largest engine size for the VW Polo Coupe p.561 et seq). The energy requirement is very high, up to approx. 700 watts depending on the temperature. The starting aid and support for mixture preparation according to the invention, principally for cold starting of spark-ignition engines, utilises ultrasonic atomisation and requires less than 1/10th to 1/100th of the energy of resistance heating. No heating-up time is required and considerably more energy is available for the starter than hitherto.

Description

Jump start and support for mixture preparation

mainly with cold start of Otto engines Prov.Nr: 22 In more recent Time is becoming more common, not just to get you started, but also to improve the exhaust gases, a semiconductor heating element used in cold mode, which changes the electrical resistance as the temperature rises, and it keeps decreasing Energy needed. So the lower the temperature, the lower the resistance and consequently the higher the power consumption. Specifically, up to approx. 700 watts and more is required from the preheating element alone for a cold start. This in turn means missing Energy on the starter. Of course, this is a question of battery capacity, but basically the smallest possible battery is to be aimed for.

Reasons: driving weight, payload, costs and environmental pollution.

- Hence the underlying task is to think of possibilities and research that require significantly less energy, but as soon as possible are functional. In order to achieve this goal, the invention proposes a Install the ultrasonic system in such a way that the carburettor and the injection nozzle falling fuel droplets are to be brought onto the vibrating plate in such a way that they are atomized and get into the work area with the passing air.

This works as follows: in the suction pipe (1) below the injection nozzle respectively.

the carburetor (2) is in the same place as it is now the heating bowl or other heating device, a suitably shaped vessel (3), in the middle or all around of which high-frequency acoustic panels (4) are arranged on which more or less large droplets of fuel fall or are guided. As soon as these have reached the oscillating plate (4), complete fogging takes place of the fuel.

The advantages of ultrasonic atomization over evaporation consist essentially in the fact that 1. the energy consumption is considerably lower, due to the lack of heat of evaporation, 2. atomization starts immediately with the Beginning of oscillation of the diaphragm - no warm-up time. This is a further improvement of exhaust gases in terms of hydrocarbons at start-up.

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Claims (1)

Claim: J Jump start primarily in cold weather Preparation of a more ignitable mixture, which in a known manner under the carburetor or the nozzle is arranged to droplet-shaped fuel deposits to comminute, characterized in that this is done by one or more acoustic Vibration membrane is accomplished (ultrasonic atomization).