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A real working prototype of the system was designed, worked out and tested before to start with the international patent protection procedures. The prototype was mounted on a Russian made passenger car with a weight of 1100 kg. (i.e. 2420 lbs.), 82 hp engine and manual gearbox. The prototype had been assembled entirely of “second hand” and even scrappy units. The hydraulic pumps had operative pressure 160 bar (i.e. 2300 psi). The volume of the high pressure hydraulic accumulator was about 5 litters (i.e. about one and a quarter gallon). The function of the computer was fulfilled by an unit including standard for the car microprocessor for control of an electric valve of the carburator, supplemented by one electronic scheme.
Here are the results of the prototype tests:
1. The basic version:
» Reduction of the fuel consumption of the car at ECE 15 Type I test cycle (according to 70/220 EEC) – 8%-12%;
2. The extended version:
» Reduction of the fuel consumption of the car at 90 km/h (56 mph) constant speed 8%;
» Reduction of the fuel consumption of the car at ECE 15 Type I test cycle (according to 70/220 EEC) – 17%-20%;
It is worth noticing that the said reductions of the fuel consumption are compared with an initial consumption of the car, which have not been originally equipped with power steering (i.e. having not any extra consumption due to it).
The operation of the system did not cause any inconvenience for the driver. Switching off-on the pumping and motoring regimes of operation was not more noticeable by the driver than switching of-on of a common air-conditioning. Apart of this they happened most often when the driver presses/looses the throttle pedal and thus he expected in any way the corresponding reactions of the car.
A real working prototype of the system was designed, worked out and tested before to start with the international patent protection procedures. The prototype was mounted on a Russian made passenger car with a weight of 1100 kg. (i.e. 2420 lbs.), 82 hp engine and manual gearbox. The prototype had been assembled entirely of “second hand” and even scrappy units. The hydraulic pumps had operative pressure 160 bar (i.e. 2300 psi). The volume of the high pressure hydraulic accumulator was about 5 litters (i.e. about one and a quarter gallon). The function of the computer was fulfilled by an unit including standard for the car microprocessor for control of an electric valve of the carburator, supplemented by one electronic scheme.
Here are the results of the prototype tests:
1. The basic version:
» Reduction of the fuel consumption of the car at ECE 15 Type I test cycle (according to 70/220 EEC) – 8%-12%;
2. The extended version:
» Reduction of the fuel consumption of the car at 90 km/h (56 mph) constant speed 8%;
» Reduction of the fuel consumption of the car at ECE 15 Type I test cycle (according to 70/220 EEC) – 17%-20%;
It is worth noticing that the said reductions of the fuel consumption are compared with an initial consumption of the car, which have not been originally equipped with power steering (i.e. having not any extra consumption due to it).
The operation of the system did not cause any inconvenience for the driver. Switching off-on the pumping and motoring regimes of operation was not more noticeable by the driver than switching of-on of a common air-conditioning. Apart of this they happened most often when the driver presses/looses the throttle pedal and thus he expected in any way the corresponding reactions of the car.