462results about How to "Reliable start" patented technology

When the temperature of an engine and a main battery is low at the time of activating a vehicle system, an ECU starts the engine in advance and outputs a running permission signal after completion of engine startup. At this stage, the ECU suspends a defect diagnosis operation on a subsidiary load and feedback-controls the DC/DC converter by setting the voltage control value to a level lower than the output voltage from the subsidiary battery and at least the lower limit of the operating voltage of the ECU. The ECU feedback-controls the DC/DC converter by setting the voltage control value to a level of at least the output voltage of the subsidiary battery in response to completion of engine start-up. Then, the suspension of the defect diagnosis operation on the subsidiary load is canceled and a running permission signal is output.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

A hand-held power tool (1) includes a linear motor (2) having a rotor (3) which is movable along a percussion axis (A) in an axially limited manner between two reversal points (W) and which can be driven by the striking piston (5) of the power tool with the intermediary of an air spring (4), sensors designed for determining the actual state of the rotor (3) and connected to a computer (9) connected via power electronics (33) to at least one field coil (10) of the linear motor (2), with the rotor (3) being displaced against a contact element (11a, 11b) at least at one reversal point (W) and being pressed against the contact element electromagnetically; and a control process for the hand-held power tool.

A pressure intensifier for fluids has an intensifier piston with a high-pressure piston and a low-pressure piston having a greater diameter than the high-pressure piston. The pistons are moveable in a high-pressure cylinder and a low-pressure cylinder, respectively, and move together. The high-pressure cylinder is connected to a high-pressure connection. A first control line is connected to a supply connector. A second control line is connected to a control valve having first and second switching positions. A first connection connects the control lines. The low-pressure cylinder is connected via the control valve in the first switching position to a supply connector and in the second switching position to a return connector. The switching positions are controlled by the intensifier piston. The intensifier piston opens or closes the first connection between the control lines. The first connection is arranged completely within a movement stroke of the high-pressure piston.

In a method of operating a starting system coupled to a crankshaft of a vehicle engine, during engine starting, torque supplied by the starting system to the engine is continuously adjusted to provide more than two levels based on operating conditions of the vehicle or engine.

Firmware FW1 and FW2 is separately stored in a non-volatile memory, in which a boot code for start-up and a restoration code are stored, and a first magnetic disk. A copy of the firmware FW1 stored in the non-volatile memory is stored in the first magnetic disk, and a copy of the entire firmware FW1 and FW2 stored in the first disk medium is stored in the second magnetic disk. When an error occurs during firmware update, upon next power-on, whether the volatile memory, the first magnetic disk, and the second magnetic disk are normal or abnormal is determined, and valid firmware is read and allocated to the volatile memory so as to perform start-up by a start-up mode corresponding to the determination contents.

An output isolated, switching power supply (100) has a transformer (73) with a primary (91) and two secondaries (92, 93), and electronic switch (75) in series with the primary, a first rectifier (87) and filter (88) on the first secondary (93) to provide bias power during both startup and operating modes, and a second rectifier (80) and filter (82) on the second secondary (92) to provide regulated output power. A resistor-capacitor network (78, 74) on the primary side provides an initial operating condition, such as a single control pulse, to the electronic switch which causes sufficient energy to be transferred through the first secondary to supply sufficient startup energy to operate a current control integrated circuit (89) on the secondary side in a staged fashion. After the initial operating condition, the current control integrated circuit generates and applies a control signal to the electronic switch through an isolation circuit (77) to cause the electronic switch to turn on and off in controlled fashion in order to deliver regulated power to the output of the supply. The low voltage, secondary side, current control integrated circuit provides a further aspect of the present invention.

A control system configured with a speed change mechanism. When starting combustion in an internal combustion engine under a combustion-stopped vehicle running condition, the combustion in the internal combustion engine is stopped, the speed change mechanism forms the one-way transmission speed, and the output member rotates. A rotational speed feedback control is executed that sets a value that multiplies a rotational speed of the output member by a speed ratio of the one-way transmission speed as a reference rotational speed of the input member, sets a starting rotational speed, and controls a rotary electric machine such that the rotational speed of the input member matches the target rotational speed. During execution of the rotational speed feedback control, a start control is performed that increases engagement pressure of the clutch to increase a rotational speed of the internal combustion engine and start combustion in the internal combustion engine.

A bandgap reference voltage circuit includes a constant-current circuit, a reference voltage output circuit generating a reference voltage according to the constant current, a power supply voltage detection circuit, and a start-up output circuit. The start-up output circuit supplies a starting potential to the constant-current circuit until the power supply voltage detection circuit detects that the power supply has reached a voltage sufficient for the constant-current circuit to maintain operation. The power supply voltage detection circuit has elements analogous to the elements in the constant-current circuit that determine this voltage, so start-up operation can occur and end reliably. The start-up output circuit includes a low-impedance path from the power supply to a node controlling supply of the starting potential, so power-supply noise does not trigger unwanted output of the starting potential after start-up operation has ended.

A hybrid drive system for a vehicle, comprising an internal-combustion engine, a generator, an electric motor, an electric energy accumulator, and a connection device for establishing mechanical connections between the internal-combustion engine, the generator, the electric motor and the vehicle, and a control device. The control device controls a converter device and, as required, the connection device such that the internal-combustion engine is used exclusively for driving the vehicle only if it operable in an operating range in which the operation could also take place only with an electromotive drive, with a specific fuel consumption ESVE lower than ESVL/(G×B×M), wherein ESVL is the effective specific fuel consumption with which the generator was driven during the charging of the energy stored in the electric energy accumulator, G is the efficiency with which the generator converts the mechanical driving power into electric power, B is the efficiency with which the electric power generated in the generator is stored as energy in the electric energy accumulator and is supplyable to the driving motor, and M is the efficiency with which the electric power in the driving motor is convertible into mechanical energy.

The invention relates to engine piston position and phase position full operation condition measurement system and method which can accurately measure the stop position of an engine piston and the phase position of each cylinder and can judge the forward and reverse rotation of an engine crankshaft. In the invention, a photoelectric element is adopted as a sensor and can generate accurate signals when at a low speed; 128 different notches are evenly distributed on a designed crankshaft signal target disc; and 128 sets of different signals are generated when the signal target disc rotates in a circle with the crankshaft to mark the absolute position of the piston and judge the forward and reverse rotation of the engine. The four effect areas of a camshaft signal target disc also can mark the phase position of the engine. The measurement system and method designed by the invention can meet real-time piston position and engine phase monitoring of an instant inversion and direct start-stop system of a direct inject gasoline engine in aspects of function and accuracy and can complete measurement of crankshaft rotation speed and camshaft phase position.

In a method of starting an internal combustion engine, a combustion energy is generated by combusting a fuel that has been injected into a cylinder in an expansion stroke when the internal combustion engine is stopped. In the aforementioned method, the combustion energy generated by combusting the fuel is obtained based on a state of an air/fuel mixture within the cylinder to which the fuel has been injected. Based on the obtained combustion energy, a kinetic energy to be supplied to the internal combustion engine from a primary energy supply source is estimated. A difference between a predetermined target kinetic energy required for starting the internal combustion engine subsequent to the start of combustion and the estimated kinetic energy to be supplied from the primary energy supply source is obtained. The kinetic energy corresponding to the obtained difference is supplied from a secondary energy supply source in the form of a starter motor.

The invention belongs to control technology of electric power transmission and distribution, and relates to a method for controlling the automatic operation of standby power by using a microcomputer. The method includes two basic control methods which are the inner bridge connection or single bus sectional connection control method and the single bus connection control method, wherein the inner bridge connection or single bus sectional connection control method comprises the following control processes of: tripping control of a first breaker 1DL, tripping control of a second breaker 2DL, switching-on charge and discharge control of the first breaker 1DL, switching-on control of the first breaker 1DL, switching-on charge and discharge control of the second breaker 2DL, switching-on control of the second breaker 2DL, switching-on charge and discharge control of a third breaker 3DL, switching-on control of the third breaker 3DL, and abnormal signal control. The method has simple action principle and high reliability, is completely in accordance with the fundamental principle of the automatic operation of the standby power, and is applicable to the one-time main connection of electric power substations in three forms of inner bridge connection, single bus sectional connection and single bus connection, in the power transmission and distribution network.

The invention discloses a circuit weak feedback side protection self-adapting start distinguishing method, which judges whether the weak feedback side protection can be started or not and opens a lockout relay of the weak feedback side protection according to weak feedback starting elements such as a zero sequence current variation starting element, a zero sequence voltage variation starting element, a phase-to-phase current decrement judgment starting element, a phase-to-phase voltage decrement judgment starting element and the like through the weak feedback features in circuit fault; when any one of the four elements meets starting conditions, the starting conditions of the circuit weak feedback side protection can be considered to be met. The starting elements can be started repeatedly, can overcome the problem that the existing protective device can only judge weak feedback once, and can the lead weakfeed back criterion to overcome the defects of incapability of being arranged at two sides, low sensitivity, inadaptation of dynamic weak feedback and the like by being matched with other criterions.